 Re: Flexible adhesive substitute | |
I can't imagine PVA would make adhesive more flexible. Besides, cementious materials and poly-vinyl-acetate don't mix. They're simply not chemically compatible.
If you mix PVA into cementious materials, the PVA will react with the cement and form acetic acid, which will cause the cement to deteriorate and crumble. Also, if you "prime" with Pva, the adhesive will eventually lose it's bond with the substrate.
Manufacturers design their products in systems. Do not ever combine them with things, or in ways, which aren't expressly stated to be suitable. It's a liability issue.
Most good manufacturers retail latex additives which you can mix with their adhesives to make them more flexible. Check out Ardex, BAL, and MAPEI. They have two component adhesives which are highly flexible, and single component adhesives which can be made highly flexible using additives.
Read the "choosing adhesive and grout with standards as a guide" post in my guide thread for additional info on how to best choose materials. You can find the link in my signature.
Also, a good piece of advice would be to read up on different manufacturers product ranges, and their prices, and then ask around what people think about them. Read the specs and guidelines, which can normally be found on their websites. You'll learn alot, and you'll get a better overview of what can be used for what, and how the materials work. |