HELP ceramic wall tiling on ply HELP PVA???

[joe brierley]

pva breaks down with moisture / water. need we say anymore about it?

 

[GazTech]

pva breaks down with moisture / water. need we say anymore about it?

Spot on Joe, Bal do not recommend PVA at all, as soon as moisture hits it it becomes live or active again and gives no barrier at all....these are the primers to use and check the spec on which applications suits you.....Gaz
BAL Prime APD

A modified acrylic polymer dispersion for use as a primer for a variety of backgrounds/bases prior to fixing ceramic tiles, mosaics and natural stone and prior to the application of levelling compound and the BAL WP1 TANKING SYSTEM. BAL PRIME APD isolates products containing calcium sulphate such as gypsum plaster and anhydrite screeds from cement-based adhesives, thus minimising the risk of reaction between the two materials.

Also suitable for use on cement:sand rendering, blockwork, plasterboard, cement:sand screeds and timber. It also provides surface strength to friable surfaces and reduces the porosity of porous backgrounds/bases, thus preventing the formation of air bubbles and prolonging the flow time with levelling compounds and extending the open time of tile adhesives. The primer is blue in colour to help ensure that a complete and even coating is obtained.

Coverage: Undiluted 100 - 200ml/m2 / Diluted 1:1 50 - 100ml/m2 Temperature Resistance: 5°C to 38°C Drying Time: 15 -30 minutes Packaging: 2.5 litre plastic containers Shelf Life: 12 months, when stored in normal, dry conditions. Store between 4°C and 32°C. Protect from frost. Store away from direct sunlight.

The Bal 10 Year Guarantee
Click here to download Material Safety Data Sheet
Click here to download Product Data Sheet
Click here to download
BAL Bond SBR

A waterbased polymer with a wide variety of uses in the construction industry, particularly as an admixture and bonding agent for cement and concrete applications. Once cured, the polymer is water and frost resistant. BAL BOND SBR can be used as a slurry coat when mixed with hydraulic cement or gypsum plaster, as a multi-purpose admixture for cement:sand mortars, concrete and gypsum plaster; as a brush applied primer, sealer or dustproofer.

Suitable for use on cement:sand screeds, toppings or renderings, plastering, waterproofing, bonding, concrete repair, priming and sealing.

Coverage: Primer (neat) 12m2/litre, Plaster 5m2/litre, Render 0.8m2/litre, Screed 0.25m2/litre,
Slurry Coat 3m2/litre Total Solids: 47% pH: 9.5 Specific Gravity: 1.01 @ 25°C Stabilasation: Non-ionic Packaging: 5 litres & 1 litre bottles Shelf Life: 12 months when stored in normal, dry conditions. Protect from frost. Colour: White Freeze-Thaw stability: Good

The Bal 10 Year Guarantee
Click here to download Material Safety Data Sheet
Click here to download Product Data Sheet
Click here to download

 

[baltas1]

BAL do not recommend PVA with their products.
The primer that is recommended for a 4:1 dilution (for certain applications) is the BAL Bond which is an SBR (styrene-butadiene).
For MG/WBP plywood, it is recommended to prime the edges and reverse side with undiluted BAL Bond. For further info refer : http://194.223.92.131/pdf/Technical Data Sheets/B & C Technical Data Sheets/Bal_Bond_SBR.pdf


baltas1

 

[GazTech]

BAL do not recommend PVA with their products.
The primer that is recommended for a 4:1 dilution (for certain applications) is the BAL Bond which is an SBR (styrene-butadiene).
For MG/WBP plywood, it is recommended to prime the edges and reverse side with undiluted BAL Bond. For further info refer : http://194.223.92.131/pdf/Technical%20Data%20Sheets/B%20&%20C%20Technical%20Data%20Sheets/Bal_Bond_SBR.pdf


baltas1

Welcome to the forums baltas1, thanks for your input, the SBR is indeed styrene-butadiene copolymer, and has many uses within construction not only as a primer, but also as admixture and bonding agent.
Bal APD on the other hand is a modified acrylic polymer dispersion type which isolates products containing calcium sulphate like gypsum plaster, and cement based adhesives from reacting with one another.....Gaz

 

[tilermandan]

i always use acrylic primer on all surfaces granfix to be exact,use this neat on all wood surfaces ply etc then diluted 3 to 1 on all other surfaces screed and plasterboard etc

 

[ukfiregod]

Hi thanks for the replies

I got in touch with BAL and they said sand, wash and roughen the ply and all will be fine for tiling over...

I live and learn

Thanks again folks:hurray: :8: