Plug Active Ground Water Leaks

A common problem when excavating for a foundation, basement or  under ground water tank is ground water seeping or gushing into the dug out area. The water can flood the complete excavation and not allow any masonry or concrete to be laid. Many times, even after pumping out the water, it keeps flooding. The only way to get any construction activity done, is to plug the leakage of ground water.

To do this we need a fast setting cement mix that does not crack on setting. A variety of products for this purpose are available, each having the goal of instantly plugging any leakage. The settings times can vary from a minute to 20 minutes. Choosing a mix with the right balance of setting time and compressive strength is the key to successfully plugging the ground water leak.

How to use a plugging cement mix?

Once the problem spots are identified, press the plugging cement into the seeping water with light pressure. Apply as much of the plug cement required to plug the leak.
Plug all leaks until ground water stops seeping into the excavation.
After the plug cement is fully set, apply a bond slurry, created using a a latex based product, over the entire surface of the plug cement.
While the bond slurry is still wet, pour the concrete or apply the masonry.

Areas of application

This method can be used to plug leaks while excavating for a foundation, excavations for basements and under ground water tanks. 

Products

Fosroc Rendroc Plug

Also available at our store :

Polymers in Construction Chemicals

Construction chemicals are the gift of modern chemistry to the civil construction and waterproofing industry. These chemicals make things that were previously thought impossible, possible. You can waterproof your roofs, construct terrace gardens, design swimming pools on the 10th floor, build retaining walls 100 feet deep, huge underground water tanks, fill gaps without using cement, all because of these chemicals and polymers.

There are a number of brands claiming market leadership in construction chemicals, but the bottom line is they all market various chemicals and additives under different names. The underlying chemicals are the same only varying in degrees of concentration, commercially termed as "solid content". Higher concentration of the active ingredient is indicated as a higher percentage of solid content.

The chemicals largely used are acrylic, latex, epoxy and polyurethane.

Acrylic is used where a UV resistant product is required. Typically acrylic is used in coatings for exterior walls and roofs. Binders used in plaster-crack-fillers are often acrylic polymers. Acrylic polymers bond well to cement and other porous substrates and have good film forming properties. Acrylic binders combined with polyester fibres create an even tougher film that is resistant to cracking with exposure to the elements. The acrylic polymer is also available as a solution that can be used as a binder along with white cement or ordinary Portland cement to create a waterproof coating that is used to coat bathroom floors before laying tiles.

Latex also know as SBR (Styrene Butadiene Rubber) is available as a solution. It has excellent bonding with cement and porous surfaces and is often used as a bonding agent. It is not UV resistant and needs protection, as it quickly deteriorates on exposure to sunlight. The strong point for latex is bonding. Cement with aggregates, water and latex create a superb repair mortar that has universal applications in repairs such as spalled concrete, broken and cracked plaster. Repairs with latex modified mortars, just stick! To create a bond slurry, mix cement with water and latex and bond bore packing to pipes, screed to mother slab concrete, old concrete to new concrete.

Epoxy. Sets like stone. It is what is used in MSeal and other epoxy putties. Epoxy tile grouts seal tile joints permanently. They are acid resistant, water proof and have excellent strength bond strength. Epoxy is also used as a bonding agent to join old and new concrete slabs. Epoxy is the chemical used in adhesives such as Araldite and Loctite Tough.

Polyurethane is another UV resistant polymer and is available as a single and a dual pack product. Polyurethane(PU) is highly elastic and has excellent bonding to most construction substrates. PU is used in sealants to seal construction joints and expansion joints. PU foams are used to fill, seal and insulate. PU foams are used to install door and window frames and as an insulating material in cold climates. PU foams are also used in bore packing, electrical duct insulation and sealing. PU coatings are also used to preserve wood and metal, also as an automotive finish.

Other chemicals such as polyester also find use in construction to anchor rods in concrete and as body fillers in automotive refinish.

These polymers have revolutionised the construction industry and have lead to more efficient and long lasting structures.

For a range of construction chemicals in India, visit www.paintnhardware.com

Also available at our store :

 

Cement Based Powder Tile Grouts Vs Epoxy Tile Grouts

Tile joint fillers also known as grout are traditionally white cement based powders that are used to fill gaps between tiles and other gaps in bathrooms and flooring. It is common practice even today to use white cement dyed with mineral based powder pigments (known commonly as oxide powders) to fill tile joints in bathrooms, flooring and terraces. While this fills the joints, it is not very long lasting. Being a cement based compound, it is not waterproof. It is absorbent and as a result carries moisture, leading to fungal/algal growth. This is what gives that ugly black/green stain to the tile joints. Also being a lime based product, it is not resistant to common cleaning agents such as acids and bathroom cleaners. This leads to erosion of the grout and ultimately water leakages through the joints.

To cover some shortcomings such as quick discolouration and uniform colour matching, many powder based cement grouts are available. These powder based cement grouts don't do much more that the above. They have no great resistance to cleaning agents and also are not waterproof. Some powder grouts do have additives to enable wide-tile-joint filling where normal grouts tend to crack. SBR based additives are also available to enhance the waterproofing capabilities of powder grouts, but they do nothing to enhance the resistance to cleaning agents.

Epoxy grouts cover all the above shortcomings. They work well as waterproof and chemical resistant tile joint fillers. They also work well on wide tile joints. They have a smooth glossy finish and never loose colour.

Epoxy grouts are supplied as 2 part or 3 part packs. They consist mainly of a resin and a hardner. 2 pack epoxies usually have a coloured resin and 3 part epoxies have clear resins and hardners and a third pigmented powder component used as an opaque filler. 2 part epoxies are easier to use in that they are easier to mix and apply. 3 part epoxies are cumbersome to mix and cause some amount of wastage.

Unlike powder grouts which have to be mixed with water to get a paste like consistency to apply. Epoxy grouts are ready to use once all its components are mixed. The mixed epoxy has a pot life of 25-45 minutes. It is prudent to be cautious while deciding on the quantity of material to be mixed. Mix only so much that can be used within its pot life. The immediate tack free time is about 10-15 minutes after application. The excess grout must be cleaned up before about 20 minutes from application. The only drawback for epoxy grouts is that it can leave behind a mess if not cleaned up properly in time. Epoxy grouts are usually applied using spacers between tiles so as to provide larger surface area for the grout to bond to the substrate. Spacers of 3mm minimum are recommended. Epoxy grout needs a dust and moisture free substrate.

Most bathroom leakages can be arrested using epoxy grouts. Epoxy grouts applied in a contrasting colour to the tiles form a beautiful grid pattern that is both modern and minimalist in design.

Epoxy grouts, as discussed above, out-perform on most criteria and are the future in tile laying.

For Commercially available Epoxy Grouts refer to "Bathroom leakage repairs - Waterproofing Tile Joints using Epoxy Grouts".

How to bond old and new concrete - Extending a concrete slab.

Renovating your construction? Need to extend your roof slab? Want to build a new balcony or chajja? You will need to extend an existing concrete slab. Old and new concrete are not exactly best of friends. Old and new concrete have to be bonded to create a water tight joint. Epoxy bonding agents are the ideal solution. Also new rods have to be anchored into the old concrete slab. To achieve this, polyester anchor grouts are the solution.

Materials Required
. Anchoring Grout
. Epoxy Bonding Agent
. Mason's tool kit
. Hammer drill and Bit
. Reinforcements Steel Rods
. Concrete Mix

Procedure
. Chip the old concrete slab to expose reinforcement rods.
. Drill 12" deep holes the diameter of the steel rebars at regular intervals in the section of the exposed slab.
. Mix the polyester resin and filler powder of the anchoring grout and partially fill the holes.
. Push the rebars into the holes within 15 minutes of filling the holes and allow the grout to set.
. Mix the 2 part epoxy bonding agent and apply on the exposed concrete with a brush.
. Pour the new concrete within 45 minutes of applying the bonding agent.
. Allow the concrete and bonding agent to set.

We have a water tight new construction.

Products in store

Epoxy Bonding Agents

. Fosroc Nitobond EP

Polyester Anchoring Grout

. Fosroc Lokfix

In Store now at 
Shree Venkateshwara Traders
#712, Modi Hospital Road, WOC,
Mahalaxmipuram, Bangalore 560086

Ph: 9036092531
Email : venkateshwara.traders@gmail.com

Waterproofing Liquid Admixtures

Water proofing liquid admixtures are usually water reducing agents or plasticisers which help the cement mortar or concrete to be pliable and dense.

Why use?
When the quantity of water is reduced, the resulting cured cement mixture is less porous and hence dense after the water has been absorbed by the cement or has evaporated. This greatly reduces capillary formation in the mixture which is the main cause of water absorbtion leading to leakage.

Dense concrete also does not allow atmospheric gases such as sulhpur-dioxide, carbon-dioxide and chlorides to be absorbed by the structure thus preventing carbonation and corrosion of steel rebars. Corroded rebars not only lose strength, but also increase in volume (rust takes up almost 10 times more volume than steel) and lead to cracks in concrete and eventually spalling. (See this article for repairs of spalled concrete)

Admixtures also improve workability of the mixture. Concrete can be cast easily, without leaving voids, due to better fluidity. Plaster shows lower rebound loss, when it is thrown onto walls and ceilings due to better adhesion. Increased cohesive property of concrete / mortars eliminates segregation and bleeding.

They also reduce shrinkage cracks in concrete and plasters

A small quantity of inexpensive admixtures go a long way in improving the performance of your cement mixtures. An investment worth every rupee.

Instructions
. Add the recommended dosage of admixture to the water for the mixture and mix thoroughly. Excess dosage can lead to reduction in strength of cement mixture.
. Ideally water must not exceed 28ltr per 50kg bag of cement.
. Add the water to the cement mixture. Mix thoroughly.

Available products


. Sikacim

. Dosage 100ml per 50Kg Bag of cement.

























. Asian Paints Vitalia

. Dosage 100ml per 50Kg Bag of cement. 













. Dr Fixit LW+

. Dosage 200ml per 50Kg Bag of cement.













In Store now at 
Shree Venkateshwara Traders
#712, Modi Hospital Road, West of Chord Road
Mahalaxmipuram, Bangalore 560086

email : venkateshwara.traders@gmail.com
phone : 9036092531 (Namit Bhulani)

Bathroom leakage repairs - Waterproofing Tile Joints using Epoxy Grouts

Leakages in/from the bathroom despite having laid tiles? Could be because of :

1. Exposed tile joints due to excessive use of acids to clean tiles.
2. Exposed tile joints due to improper application of joint fillers.
3. Gaps near drain.

A simple solution

Epoxy Tile Joint Fillers also known as epoxy grouts give you a  glossy, clean and acid resistant tile joint. They are very simple to apply and give you a long lasting solution to a nagging problem. 

Materials 
. Epoxy Resin and Hardner
. Coloured Filler to match the tile.
. Masking Tape of suitable width
. Putty Knifes
. Groove cutting machine or a scraping blade
. Gloves
. Scrubbing pad (like Steel Wool or 3M Scotch Brite)


Application
. Using the groove cutting machine or the scraping blade, remove all old and loose material from the joints.
. Mask the tiles on either side of the joint leaving a gap along the joint.
. Mix the required quantity of the epoxy base and hardner.
. Mix the coloured filler to the mixed epoxy.
. Fill the mix into the joint using a putty knife.
. Let the filler set for about 10mins.
. Once filled, remove the masking tapes and wipe away any excess material using a scrubbing pad.
. The filler will completely set in about 5-6 hours.


Epoxy Grouts available at our store

. ROFF Tilemate Epoxy Grout and Coloured Filler - 3 Part

. Asian Paints Epoxy Tile Grout - 2 Part

How to use Asian Paints Smartcare Epoxy Grout.

Precautions and Prevention

. Do not use acid or other acid based toilet cleaners excessively, as this eats away commonly used joint fillers such as cementitious grouts or white cement. Always use acids and cleaners in diluted form.

. Always apply a coat of waterproofing before laying tiles.


Above products available in store now:
Shree Venkateshwara Traders
712, Modi Hospital Road,
West of Chord Road, Mahalaxmipuram
Bangalore 560086

9036092531 - Namit Bhulani
080 - 23592523 - Landline

venkateshwara.traders@gmail.com

Sealants

Sealants find a variety of uses in new constructions and renovations. Sealants are available for a variety of different substrates all having a common purpose of sealing. They can also be used for bonding and gap filling. Depending on the elasticity of the sealant, it can be used in expansion and construction joints.

Wacker, a leading name in the world of silicone products, produces a number of sealants for the construction industry :

General Purpose (GP) Silicone Sealants
All Purpose | Gap-filling | Glazing | Plumbing | Electric

GP Sealants are used for substrates such as glass, wood, stainless steel etc. Can be used in a variety of applications for sealing and gap-filling. Can be used to bond glass to wood. GP Sealants are acetoxy cured and are corrosive to metals.
Available in Clear, White, Black, Grey and many other shades.

WeatherSeal Neutral (WN) Sealant
Interior | Exterior | Weatherseal | Connecting Joints | Windows & Doors

Designed specially for sealing External and Internal Connection and Expansion Joints. Can be used on alkaline substrates like concrete and mortar. It is Neutral in pH and non corrosive to metals. Excellent for sealing
. Skylights.
. Gaps between window/door frames and walls.
. Gaps between roofing sheets and walls.
Available in Clear, Grey, White and Black shades.

Paintable Sealants (PS)
Cracks in Walls | Gaps in bathrooms

Designed to fill gaps and cracks and can be easily painted over. It is an acrylic based hybrid sealant and is mainly used in decorative applications.
Available in White.

Sealants are available in standard cartridges which can be loaded into dispensers and easily used, avoiding the need for messy application by hand or putty knife. 

Application
. Clean the gap to be filled or sealed thoroughly with a wire brush/scrub pad or appropriate solvents to ensure it is free from oil, grease and dirt.
. Cut the seal on the sealant cartridge.
. Cut the nozzle provided with the sealant to get the appropriate thickness of the sealant bead/flow.
. Load the cartridge into the sealant dispenser.
. Dispense the sealant in a continuous bead. In case of the bead breaking, a small overlap must be made.
. Wearing appropriate gloves, press the sealant with your finger into the gap.

Viola... we have sealed joints and filled gaps!!

Wacker Sealants are available in store now @
Shree Venkateshwara Traders
712, Modi Hospital Road, WOC,
Mahalaxmipuram, Bangalore 560086
Ph: 9036092531
email : venkateshwara.traders@gmail.com

Anti Microbial Polyurethane Wall Coatings

Are you looking for an anti-microbial hygiene coat for your walls? Not satisfied with the performance of your regular acrylic paints? Are you looking for the next level in paint technology?

Polyurethane wall/cement paints are the answer for your interior and exterior wall paint needs.

 These paints have the following unmatchable Properties:

An Operation Theater painted with PU.

. High Sheen Level.
. Anti fungal and Anti Microbial - can be used as a hygiene coat.
. High Washability - Repeated cycles of washing can be performed.
. Forms a water proof barrier.
. Dry Film Thickness of 100micron, almost double that of regular acrylic paints.
. Excellent Crack bridging ability on cement plaster.
. Non Yellowing - shows minimal sulphur dioxide degradation.
. Anti-Carbonation - Protects the cement substrate and steel re-bars in RCC from smoke and chemicals.
. Can be applied on highly porous surfaces to reduce surface porosity and fluid absorption.
. Exterior grade PU has high UV Resistance - shows no degradation in sunlight.

Areas of Application:

. Interior walls of homes, apartments and offices.

. Hospitals and Operation theaters.

. Chemical Laboratories and Industries.

. Diagnostic laboratories.

. Exterior grades can be used as floor coatings.

. Exterior grades can be used for external wall painting and waterproofing.

. Exterior grades can be used as a waterproof barrier for terrace waterproofing.

  

Products available at our store

. MRF New Wall Coat (2 pack Solvent Based, Exterior Grade) 

. For Interior and Exterior walls.

. Thinner - GP Thinner. (10%-30% thinning)

. Primer - MRF Penetration Primer (Clear/Transparent).

                (10% thinning using GP Thinner)

. Coverage of 60sqft per litre per coat.

. Primer covers 60sqft per litre per coat.

. MRF Aquafresh (Water Based, Interior Grade)

For Interior walls.

Thinner - Potable water. (30%-50% thinning)

Primer - MRF Aquafresh Primer (Opaque White). 

             (30% Thinning with potable water)

Coverage of 140sqft per litre per coat.

Primer covers 120sqft per litre per coat.

 

 

Procedure of Application

. Make sure the cement plastered wall is free from dirt and grease and any loose particles. Use methods such as sanding or wire brushing to achieve this.

. Using a roller or brush, apply a coat of primer with required thinning. Allow to dry for 4-5 hours for water based products and 6-8 hours for solvent based products.

. Using leveling materials such as acrylic putty, bring the surface to a smooth finish.

. Apply a second coat of primer with required thinning. Allow to dry.

. Apply the first coat of PU top coat using a roller or brush with required thinning. For 2 pack systems, mix the base and hardner which are supplied in pre-measured packs and apply within the specified pot-life (usually 1-2 hours). Only material required for 1 coat must be mixed at a time.

. Allow to dry for 4-5 hours for water based products and 6-8 hours for solvent based products.
. Apply second and final coat of PU top coat.

We have bacteria free and beautiful walls.

Available in store now, at

Shree Venkateshwara Traders
712, Modi Hospital Road,
West of Chord Road, Mahalaxmipuram
Bangalore 560086

9036092531 - Namit Bhulani
080 - 23592523 - Landline

venkateshwara.traders@gmail.com

How to Keep Exposed Concrete and Cement Pavers Free of Organic Growth

Exposed Concrete & Cement Pavers

Exposed concrete gives an urban and contemporary look to any structure. Due to its porous nature, exposed concrete absorbs water and thus is susceptible to fungal and algal formation, ruining its aesthetics. It therefore needs to be protected from moisture.

Cement Pavers have great aesthetic value and also provide a hard finished surface with the minimum of fuss. They too are porous and absorb water easily, making them damp and susceptible to fungal and algal growth.

Organic growth is only the symptom. The real problem is water absorption.

Why prevent fungal / algal growth ?

Although fungal and algal growth are not harmful to the above substrates, they need to be prevented for
1. better aesthetics.
2. ease of maintanence.
3. In the case of pavers and concrete used in walkways, fungal / algal growth makes them slippery and it is all the more important to prevent them.

The Solution

Stopping water absorption, stops organic growth. 

A transparent water repellent coating is ideal to prevent absorption of water.

Products such as siloxane based water repellants are excellent for this purpose for the following reaaons.

1. They do not alter the look of the substrate in any way. 

2. They are absorbed into the pores of the substrate, thus there is no film formation as such and no risk of breakage of film, giving it a long usable life.

Products

. Organo Silane, water soluble, water repellant.
. Eco-Friendly, low VOC.
. Nano particles penetrate into cement pores and capillaries. Creates a layer of water repellant cement, upto 5mm deep.
. Prevents problems caused by dampness such as fungal formation, Scaling, premature aging, spalling etc.
. UV and thermal stable.
. Easy to apply by brush, spray or roller.

Application

. Make sure surface is free from oil, grease and organic growth. Use wire brushing along with water to remove any organic growth.
. Dilute silane product to given consistency using water. For zycosil plus, dilution is 1:20 parts of water. Consume within 48hrs of dilution.
. Apply by brush, spray or roller. Cover entire surface at one go.
. Surface is ready to use after 24 hours.
. Life of 10 years upwards is expected, depending on the wear of the surface.

An easy solution to a nagging problem.

Available in store now, at

Shree Venkateshwara Traders
712, Modi Hospital Road,
West of Chord Road, Mahalaxmipuram
Bangalore 560086

9036092531 - Namit Bhulani
080 - 23592523 - Landline

venkateshwara.traders@gmail.com

How to Waterproof your Terrace Garden

A terrace garden can be a refreshing getaway in a busy urban life. Waterproofing a terrace garden keeps away leaks and stops roots from growing into the roof slab, so that you enjoy years of beautiful blooms.

In order to do so we need a coating that
1. forms a waterproof barrier
2. Is flexible so as to accomodate movements in the roof slab and construction joints.
3. Forms a physical barrier to roots of plants.
4. Should be UV resistant as the terrace will be exposed to sunlight.

Sika's anti-root waterproof system for terrace gardens.

In the system shown in the above diagram, a PU based waterproof coating has been used which is overlayed with a water reduced cement concrete screed, protected by a UV resistant acrylic polymer modified cementitious(APMC) coating.

1. The PU coating provides a flexible waterproof coating.
2. The concrete screed does not allow roots to penetrate the roof slab.
3. The APMC Coating provides UV stability and also keeps the concrete screed waterproof.

Let us see the application procedure.

Application 

. The terrace slab is prepared so that there are no loose debris, cracks, potholes or fungal/algal formation on the slab. Methods such as wire brushing can be used to remove any organic growth on the slab. Slab repairs can be taken up using a polymer modified cement mortar.
. Once a sound surface is obtained, brush apply a coat of specified primer.
. Brush apply 2 coats of the PU based waterproof coating on the slab and upto the full height of the parapet walls with sufficient time between coats to allow for curing.
. Create a bond coat slurry by mixing sbr latex, water and cement in the proportion of 1:4:8 by volume.
. Apply the bond coat onto the cured PU waterproof coating. Once the coat is tacky, in about 30 to 45 mins, the screed concrete can be layed on top.
. For the screed concrete, a dry mix of cement, sand and aggregate is first prepared in the proportion of 1:2:3 by volume.
. A maximum of 23ltr of water should be added per 50Kg bag of cement. A water-reducing admixture in the proportion of 100ml-200ml (depending on the product used) per 50kg bag of cement should be added to the water.
. Add the water to the concrete mix and prepare the screed concrete.
. The screed concrete is spread onto the still tacky bond slurry making sure to provide slopes towards the water outlets.
. The screed is water cured for 2-3 days.
. Once cured, a acrylic polymer modified cementitious coating that is UV resistant is applied on top of the screed upto the level of soil contact with the slab and parapet walls.
. Cure the coating with water for 2-3 days.
. Over the coating, it is recommended to lay a geotextile fabric and spread loose gravel and silica sand on top of it. A uniform grill which will hold the soil and allow water to drain away should be laid on top of the gravel.

The soil can now be laid for that flower bed.

Products 

Products available for the above system at our store 

Shree Venkateshwara Traders, Modi Hospital Road, Bangalore are :

PU Coating

.Sikalastic 450I

Primer

. Sikalastic 450I Primer

Water Reducing Admixture

. Sikacim

. Dr. Fixit Pidiproof LW+

. Roff Hyproof

SBR Latex

. Sika Latex Power

. Pidicrete URP

Acrylic polymer modified cementitious coating

. Sika Topseal 109hi

. Dr. Fixit Fastflex

Above products Available in store now, at

Shree Venkateshwara Traders
712, Modi Hospital Road,
West of Chord Road, Mahalaxmipuram
Bangalore 560086

9036092531 - Namit Bhulani
080 - 23592523 - Landline

venkateshwara.traders@gmail.com

How to Protect Interior Wall Surfaces from External Dampness

Damp patches and fungal formation on interior walls? Paint flaking? Damp odour in your room? Its probably due to water leakage in your walls.

A simple procedure to arrest leaks from the inside is to provide a breathable water barrier. Breathable meaning that water vapour is allowed to pass through the barrier but liquid water is not. Any latent moisture in the walls is thus allowed to evaporate and any liquid water is blocked from entering beyond the barrier. 

Epoxy coatings are an excellent choice for the above. 

Materials required

. 2 part epoxy coating.

. White cement (for severe leaks)

. Wire brush, sand paper 80 grit.

. Putty knives

. Paint brush

Application

. Sand or wire brush the surface to remove all paint and loose materials, to expose the plaster.

. Slighty wet the surface with water.

• For normal leaks 

. Mix the 2 part epoxy thoroughly in its individual containers. 

. Now create a mix of the proportion 1 epoxy resin : 1 epoxy hardner : 1 part water. Mix thoroughly to gain a uniform consistency.  Note that the thus created mix should be consumed within an hour.

. Apply the first coat of this mix with a brush on the affected surface.

. After about 5-6 hours, create a second batch of the mix and apply the second coat in a direction perpendicular to the first coat.

. Allow the latent moisture to breathe out. The drying out time period can vary from 1 to 7 days.

. Normal paint and putty work can be undertaken after the drying out period.

• For severe leaks

. Mix the 2 part epoxy well in its individual containers.

. Now create a mix in the proportion of 1part epoxy hardner : 1 part epoxy resin : 4 part white  cement by weight. The thus created mix is an epoxy putty and must be consumed within an hour.

. Apply the epoxy putty using putty knives over the entire surface. 

. Allow to dry for 5-6 hours.

. Now create a fresh batch in the proportion of 1 part epoxy hardner : 1 part epoxy resin : 1 part water and apply using a paint brush over the entire surface. 

. Allow the latent moisture to breathe out. The drying out time period can vary from 1 to 7 days. 

. Normal paint and putty work can be undertaken after the drying out period. 

No more leaks!

2 Part Water Based Epoxy Products

2 part water based epoxy systems available at the store are :

l

. Dr. Fixit Dampgaurd (500g, 1Kg packs)
. Product Rating (4.5/5)
. Can be tinted with water-based stainers to match the colour of the wall.
. Dr. fixit Dampgaurd TDS.pdf

          

For any queries you can contact us or visit us.

Technical Datasheets for the above products can be found here.

Shree Venkateshwara Traders
#712, Modi Hospital Road, West of Chord Road
Mahalaxmipuram, Bangalore 86

Namit 9036092531
venkateshwara.traders@gmail.com

Waterproof Exterior Acrylic Wall Coating Products

Waterproof Acrylic top coats for Exterior walls available at the store
 




Dr Fixit Raincoat
Product Rating : (5/5)
Raincoat TDS.pdf










For any queries you can contact us or visit us.

Technical Datasheets for the above products can be found here.

Shree Venkateshwara Traders
#712, Modi Hospital Road, West of Chord Road
Mahalaxmipuram, Bangalore 86

How to Waterproof and Paint Exterior Walls

Tired of applying coat after coat of white cement on rain lashed walls and leakage still returns? Applied the most expensive decorative exterior paint and the leakage is still there? Contractor making a profit but building still not waterproof? Well the problem lies in the solution. The wrong solution. 

The common misconception among untrained contractors is that white cement is waterproof, which is not true. White cement being a form of cement, absorbs water and does not form a barrier against it, thus is not waterproof.
Also decorative paints that are commonly used on exterior walls are for mainly one purpose ... decoration, not waterproofing.

The proper solution is as follows.

Materials Required

. Acrylic polymer for repairs

. White cement (But why??, didn't you just say its not waterproof? Ans: It is used as a filler along with an acrylic repair polymer.)

. Acrylic Waterproof Coatings for Exterior Walls
. For new cement surfaces, Primer for  acrylic waterproof top coat.

. A good quality, large paint brush (100mm, 4")

Application

. Wash and saturate surface with water. All work should be taken up when surface is dry to touch (about 45mins later).

. Check for cracks and damage. Where there is cobweb cracking (cracks < 1mm), a mixture of 1part acrylic polymer for repairs : 2 part white cement by weight is prepared and applied by brush over the surface. The thus formed coating must be water cured twice a day for 2 days.

. Cracks > 1mm can be filled using an acrylic crack filler.

. Damage can be repaired using a polymer modified repair mortar. 

. Construction joints such joints between structural members and brick walls can be filled using a polyurethane construction sealant.

. Apply a coat of cement primer (as recommended by Acrylic waterproof top coat's product data sheet) diluted to the correct consistency on the entire surface using a paint brush.
. After about 4-5hours, apply the first coat of the acrylic top coat for walls by roller/brush; usually undiluted.
. 5-6hours later a second coat in the direction perpendicular to the first coat is applied. 

As can be seen, the above system is exactly the same as that followed when painting exterior walls with decorative paints. Thus adding no extra labour costs.

Advantages

. This system serves 3 purposes : 1. prolongs the life of the masonry (giving the property both life and value) 2. Gives an excellent finish 3. can be tinted to a shade of your choice; can be used as a decorative paint.
. The system is cost effective : can be done in the same cost of labour as decorative paints  
. The dry film thickness (DFT) of the system is usually > 130microns and gives excellent crack bridging.
. A heavy duty water barrier is formed keeping water out.
. Acrylic top coats give excellent anti-fungal and anti-algal performance.

So when you think of painting your exteriors, this system is an excellent option.

How to fill plaster cracks using an acrylic crack filler

Materials Required

. Acrylic Crack filler paste

. Putty blades/knifes

. Mason's toolkit

Application

. Identify cracks that are > 1mm and < 6mm. 

. Check for soundness of the plaster around the crack. Any loose plaster must be chipped off using a chisel or a stone cutting machine.

. Wire brush the crack and wash off dust and debris with a jet of water. 

. Prepare a primer for the crack by mixing the acrylic crack filler paste with water to obtain a paint like consistency. Apply the primer using a paint brush along the cracks and to about 25mm either side of the crack.

. While the primer is still tacky, fill the crack with the crack filler paste using a putty knife in direction perpendicular to the crack. The paste must be spread to about 25mm either side of the crack.

. Allow to cure for 24hrs.

. A second coat of crack filler can be applied to level the crack with the surrounding plaster.

How to Waterproof your damaged Terrace/Roof - Rescreeding / Re-laying maddi

Severe leaks in your roof slab can cause premature aging of the slab concrete. This causes

. weakening of the slab
. concrete breaking off, exposing the steel reinforcement bars (spalling)
. in milder cases, paint and putty flaking

not only giving your property a bad appearance but also diminishing its value and life. 

Screed de-bonding is one of the major causes of terrace leakage. Redoing the concrete screed on the terrace can help prevent the leakage. Proper bonding can be achieved by the following system.

Materials Required

. Latex or poly-carboxyl bonding agent

. Ordinary portland cement (OPC)

. Aggregates for screeding

. Waterproofing admixture

. Mason's tool kit

Application 

. Check the screed on the terrace for hollow spots using the wooden handle of a hammer.

. Chip off the loose material to obtain a sound surface with straight edges and repair using a polymer modified repair mortar..

. If there is excessive hollowness, chip off the complete screed using a hammer and chisel and remove the debris.

. With clean water, wash off all excess/loose dirt and debris and saturate the mother slab.

. On the side walls, mark the slope that has to be created in the screed, required for water run-off.

. Create the bond slurry using the latex/poly-carboxyl polymer, water and OPC usually in the proportion of 1 polymer : 4 water : 6-8 cement by weight.

. Apply the bond slurry using a large size brush or a hard broom, covering the entire surface evenly. Also apply the bond slurry to a height of about 100mm on the parapet walls.

. Prepare the screed concrete using OPC, aggregates and water containing a waterproofing admixture in the desired proportion (Refer to manufacturer's data sheet for the quantity of waterproofing admixture required).

. In the wet on wet condition (while the bond slurry is still wet), lay the screed concrete over the surface using a trowel to level the surface to obtain a minimum thickness of 50mm. Particular care must be taken to create slopes for water run-off while laying the screed concrete.

. Cure the thus formed cement surface using water.

. Once cured, prime the wall and floor joints using a mixture of 1 latex polymer :1 cement. Form angle fillets of 40mm x 40mm along the wall and floor joints using a polymer modified repair mortar while the primer is still tacky (wet on wet).

A sound screed gives a waterproof terrace.

How To Waterproof Your Underground(Sump) / Concrete Water Tank

Waterproofing your concrete water tanks can be done in 2 steps.

. During construction - Integral water proofing

. After Construction - Waterproof barrier cum Hygiene coatings

For Integral Waterproofing  

 Waterproof liquids / additives are available to make concrete dense and less porous, reducing water seepage. These liquids reduce the amount of water required to be added to concrete. Less water means dense concrete and lesser pores. 

Materials Required

. Cement, Jelly, Sand, Water (Concrete Mix)

. Waterproof Liquid

Application

. Measure water required for the concrete mix according to the waterproof liquid's  manufacturer's data sheets.

 The liquid is added to the measured water in the dosage (per bag of cement) as prescribed by the.manufacturer's data sheets.

. The above mixture is then added to the concrete mix. 
. Pour concrete and allow for curing.

Waterproof concrete is ready... or is it really?

 Waterproof barrier cum Hygiene coating

 The above does make the concrete dense but not 100% water proof. Hence, a waterproof barrier coating is recommended.

Materials Required

. Acrylic polymer bound cementitious waterproof coating material - Forms a waterproof, flexible coating.

. 2 component food-grade Epoxy coating material - Forms a hygiene coat; Prevents fungal formation and improves water-tightness.

. Brush

Application

. Saturate the cured cement surface with water.

. Liquid component of the acrylic polymer bound cementitious waterproof coating material is measured out into a bucket.

. The powder (cementitious) component is added slowly while stirring continuously to the liquid in the required proportion (usually 1 liquid : 2 powder by weight or as prescribed in the manufacturer's datasheet). Stirring is very important to avoid formation of lumps.

. Brush apply the mixture on the substrate. 

. Allow the coating to dry. 

. Cure the coating with water.

. Once cured, saturate the coating with water.

. Stir the contents of the 2 part epoxy first in their individual containers to a uniform consistency and then mix the the 2 components in the required proportion (usually the 2 components are available in pre-measured packs or as prescribed in the manufacturer's datasheet). Addition of water as per the datasheet.

. Apply the first coat of the epoxy system with a brush.

. Allow the coating to air-cure for about 6-8hours.

. Brush apply the second coat in a direction perpendicular to the direction of application of the first coat.

. Allow the coating to air-cure and harden. 

The above process takes about 48 hours and water can be filled in the tank after about another 48 hours.

A water-tight water tank which provides us years of clean potable water is ready. 

Some product links :

Acrylic polymer bound cementitious waterproof coating material
http://paintnhardware.com/waterproofing/461-smartcare-dampblock-2k.html 
http://paintnhardware.com/waterproofing/175-sikatop-seal-107-5kg.html

Waterproof Liquid
http://paintnhardware.com/waterproofing/96-asian-paints-smart-care-vitalia.html


2 component food-grade Epoxy coating material
http://paintnhardware.com/waterproofing/327-dr-fixit-dampguard-1kg.html

Acrylic Crack Filler Products

Crack Fillers available at the store are :

. Sika Cracksil(500g, 1Kg packs)
. Product Rating (5/5)
. Can be tinted with water-based stainers to match the colour of the wall.
. Sika Cracksil Paste TDS.pdf

                            . Asian Paints 
                              Smart Care - Crack Seal 
                              (360g, 900g packs)

                             . Product Rating (5/5)

                              Asian Crackseal TDS                           

 
 . Dr Fixit Crack X (1Kg, 5Kg packs)
. Product Rating (4/5)












For any queries you can contact us or visit us.

Technical Datasheets for the above products can be found here.

Shree Venkateshwara Traders
#712, Modi Hospital Road, West of Chord Road
Mahalaxmipuram, Bangalore 86

How to seal and waterproof construction joints - using polyurethane (PU) sealant and bituminus waterproof tape

Construction Joints are different from plaster cracks in many ways. 

. Joints are usually 2mm to 19mm wide, plaster cracks are usually 0.5-2mm wide.
. Joints usually have movements in them such as structural movements, movement due to unequal expansion of adjoining substrates etc. Plaster cracks are usually static.
. Joints can be sealed using permanently flexible compounds, whereas plaster cracks can be filled using materials that become rigid upon curing.

As a result, joints have to be treated differently from cracks. Here is one of the methods that can be used to seal and waterproof joints.

Materials Required 

. Polyurethane sealant

. 100mm wide Bituminous Tape

. Mason's Kit

Application

. Clean out the joints using a wire brush and remove the dust and debris using a dusting brush.

. Using a gun-grade Polyurethane(PU) Sealant, slowly squeeze out the sealant and move along the joint forming a continuous bead. In case of a break in the bead, overlap the new bead with the old for about an inch and continue. Allow the sealant to cure according to the manufacturer's datasheet.

. After the sealant has completely cured, check and fill any gaps.

. Paste the bituminous sealing tape along the joint sealed using the PU sealant, using a rubber roller giving good pressure. In case a rubber roller is not available, a bundle of cotton waste can also be used to apply pressure. At joints in the tape, ensure overlap of about 50mm. 

. If required, an acrylic topcoat can be applied on the tape by first priming the surface using a latex based primer. The topcoat must be spread about 50mm either side of the tape.

No more leaky joints!

Practical Scenarios

The above method can be used to seal joints such as

 . Parapet wall and terrace slab joints.
 . Joints between walls of adjoining buildings.
 . Skylight joints
 . Window-wall joints etc.

Products Available

. Sikaflex PU Sealant

Sikaflex Construction Sealant is a moisture-cured, 1-component, polyurethane-based,
non-sag elastomeric sealant.

Where to Use 
> Designed for all types of joints where maximum depth of sealant will not exceed 1/2 in.
> Suitable for vertical or horizontal joints; readily placeable at 40°F (4°C). 
> Has many applications as an elastic sealant between materials with dissimilar coefficients of expansion.

Ideal for:
> Weatherproofing of joints between brickwork, blockwork, masonry, wood and concrete
or metal frames.
> Joints in walls, floors, balconies, around window or door frames.
> Expansion joints.
> Roofing.
 
Advantages 
> High elasticity – cures to a tough, durable, flexible consistency with exceptional cut and tear-resistance.
> Stress relaxation.
> Excellent adhesion – bonds to most construction materials without a primer.
> Excellent resistance to aging, weathering.
> Non-staining.
> Urethane-based; suggested by EPA for radon reduction.
> Paintable with water-, oil- and rubber-based paints.
> Capable of ±25% joint movement.
> NSF Certified to NSF/ANSI Standard 61 for potable water contact.

. Sika Multiseal Tape

Self-adhesive, rubber modified, bituminous sealing tape, one side laminated with
aluminium foil.

Sealing and repairing against water ingress and draughts in:

• Roofs including sheet metal work
• Building cracks
• Bituminous felts and other types of roofing sheet
• Joints of wall to wall and floor to wall in sunken slab
• Joints of AC cement sheet with wall
• Around pipe penetrations in walls/concrete

Characteristics / Advantages

• Very easy to apply
• Very economical
• Good adhesion to many substrates
• Weather-proof
• Self-adhesive
• UV-resistant
• Can be over-painted
• Can be applied at low temperatures

In Store now @
Shree Venkateshwara Traders
#712, Modi Hospital Road, WOC,
Mahalaxmipuram, Bangalore 560086

ph: 9036092531
email : venkateshwara.traders@gmail.com