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Discuss What acrylic primer? in the Tile Adhesive / Grout Advice area at TilersForums.com.
I'm pretty sure bal don't recommend using primer on ply (the tiled surface) when using bal single part fast flex...I've never known a situation where priming is detrimental to the work even if not specified as a necessity
They might not specify it as required but I bet if you asked them if it was OK to do they would say you can if you want .I'm pretty sure bal don't recommend using primer on ply (the tiled surface) when using bal single part fast flex...
Reply to What acrylic primer? in the Tile Adhesive / Grout Advice area at TilersForums.com