Wetroom Tanking with NoMorePly and Mira

[travispuk]

Hello, first post from DIYer... sorry.

I have laid down 6mm NoMorePly sheets onto 18mm ply using Mega Adhesive and screws. I also have Mira 4400 tanking membrane plus Mira Safecoat. I have seen a lot of people here on the forums point out that PVA should not be used for priming the NoMorePly boards, so my question is, I have Mira 4180 primer, I assume that this is not PVA based and therefore will not cause an issue being used on the NoMorePly boards? Should I not be using that and going for SBR primer instead?

The only place I have used PVA in my wetroom is to bond the brickwork before using a flexible tile adhesive to fix 12mm NoMorePly boards to it, therefore no direct PVA contact with the boards themselves.

I can't see anything about the mira 4180 primer being PVA based or that it should not be used in this situation.

Thanks for your help.

 

[White Room]

Why would you prime the no more ply boards as they are cement based anyway.....

 

[travispuk]

Weirdly enough I can't reply with what I wanted to send through.

 

[travispuk]

Purely because the Mira instructions advise that the surfaces are primed with 4180 before using the 4400 membrane. I have the primer already, but was just concerned that using it on the NMP would cause a problem as the comments I have seen here seem to be pretty hard on the do not use PVA, naturally I was concerned reading this and not knowing the base of the 4180 primer.

 

[Gazzer]

I believe that primer is SBR so its fine IMO.

 

[travispuk]

Thanks Sir Ramic.