Bal APD primer not doing its job on Marmox and Impey waterguard

[ahearsum]

Marmox shouldn't be dusty and cement like? Are you sure it's marmox?

Maybe dusty is the wrong word, perhaps dry. Definitely cement though from the marmox website "each side faced with fibreglass mesh embedded into a cement polymer mortar". Yes definitely Marmox.

 

[benchwarmer]

Maybe dusty is the wrong word, perhaps dry. Definitely cement though from the marmox website "each side faced with fibreglass mesh embedded into a cement polymer mortar". Yes definitely Marmox.

100% don't prime
👍🏻

 

[CJ]

Did you dilute APD?

 

[ahearsum]

Did you dilute APD?

Did two tests with neat and diluted. Diluted was better but not as good as unprimed. I phoned Impey and Marmox and they both said priming isn't necessary. Glad I sorted that before priming the whole room and having my tiles fall off a few months later! Being an amateur I just assumed everything supplied in the kit was to be used.