While mastic does have strong points such as great adhesive properties and adaptability to many substrata high performance in wet areas is not one of its high points.
Mastic for wall tile.
Mastic has superior holding strength easier to apply and sets quickly.
Bostik multi purpose mastic is a high performance adhesive for the interior installation of most types of ceramic and stone tile except moisture sensitive marble.
It allows the quick and efficient setting of porcelain quarry stone ceramic and mosaic tiles.
When used to tile walls it s strength allows you to set tile and if you re good with eyeballing you can set tile without the use of spacers.
Formulated for the installation of ceramic tiles on floors walls and countertops as well as in shower enclosures.
For interior use only.
For use on shower walls.
Although there are drawbacks with mastic there are advantages.
Smooth and easy to spread premixed adhesive.
Gypsum wallboard dry walls only cement board exterior grade plywood interior only concrete and masonry block.
Pre mixed for easy installation.
Tile up to 12 in x 12 in on walls 6 in x 6 in on floors.
Bostik multi purpose mastic is ready to use for a fast professional installation and provides excellent vertical grab for large bodied tiles.