No More Ply 6mm with PB adhesive?

[Ollyfp]

Wait! Just before you all clock-off for the weekend!
So, I figure I can save a bit of time, money and mess by boarding over a dodgy internal brick wall with No More Ply 6mm tile backing boards, which can (apparently) be painted, to give a 'large format tile' effect. The method of adhesion is usually dot and dab, but I don't really want to buy endless tubes of the hellishly expensive branded grab adhesive, so I just wondered if anyone has used regular paddle mix PB adhesive with these boards? I can't see why it wouldn't work. Famous last words!?
Thank you!

 

[Wayners]

Pb adhesive is a bit fussy on what it sticks to. Won't stick to painted surfaces very well as example.
Will stick to your bricks but I don't know about board.
Maybe try and see if it works.

 

[Ollyfp]

The walls are rendered and the plaster coat has been removed. I've successfully stuck PB to this finish for a few years, but PB is porous. As NMP tile backer is water-impervious, it might affect the drying time and grab strength.
I'll keep you posted!

 

[cdbe]

Tile adhesive.

 

[Ollyfp]

Tile adhesive.

Thanks! Is that from experience or just a suggestion? Makes sense to me.

 

[cdbe]

From experience, and it's a suitable product for that job.

 

[Ollyfp]

As there will be no tiles attached to the NMP, I'm going to try a single panel with PB adhesive. If it doesn't go off and hold firm I'll switch to tile adhesive. I'll post the results. Thanks all!

 

[Ollyfp]

Okay, so it turns out that PB adhesive works fine with 6mm No More Ply on rendered brick walls. I supported the boards with a single screw for 24 hours. Note that you don't get the same 'grab' that you get when sticking plasterboard because NMP resists water absorption.
Thanks for your contributions!