Discuss BAL Prime APD on Cement Board - Dilute or Not? in the Tanking and Wetrooms Forum area at TilersForums.com

schismatic

New to TilersForums.com
I’m about to tank Hardie Backer cement boards using the BAL WP1 waterproofing kit. I’m a bit confused with the Prime APD. Should I just paint this straight on, undiluted, or should I be diluting at all? If I do need to dilute, what proportions?

Cheers.
 
W

Waluigi

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Screeded floors need diluting 1:1 but I remember Bal being a bit funny with their installation instructions regarding WP1. At the stage at which I stopped using their system, they wanted you to skim the Tile backer board with tile adhesive and priming/tanking once dry.

This was ten + years ago so might be worth contacting their tech team. They’re usually very good.
 
OP
S

schismatic

New to TilersForums.com
Probably best if I ring them to get a proper answer, but I suspect that dilution will be required as the boards are cement-based.
 
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