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Had the bathroom skimmed over 2 weeks ago and is now dry. Some chases in the wall had to be bonded and skimmed and its still a little wet but I want to get started on the walls that are dry.

Bal https://www.tilersforums.com/forums/tile-adhesive/ pack im using says to prime with bal prime APD before, is there an alternative brand people use or would a mist coat of cheap emulsion do the job to?

Cheers
 
O

Old Mod

Need to use an acrylic or tile SBR primer mixed as per manufacturers recommendation.
It will state dilution for plaster.
Pva in any form is not suitable at all.

The only downfall to useing another product outside of https://www.tilersforums.com/forums/tile-adhesive/ manufacturers recommendation is that if there is any kind of issue in the future where the integrity of the https://www.tilersforums.com/forums/tile-adhesive/ is called in to question, they will know immediately that you've used a third party primer which they will use as a reason not to take responsibility.
 

peteablard

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I generally try and stick to the same manufacturer for primer and adhesive, that said I've mixed and matched many times with no problem. Small bottles of BAL primer are available so shouldn't cost too much. As above, don't paint it and avoid PVA
 
OP
M
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Cheers for ur replies, Im assuming I don't need to do this on the walls im tanking (i.e applied after tanking and before tile).

As for under the tanking, the bal tank it instructions dont mention any primer so looks like i can apply the tanking direct to the plaster.

Does that all sound good?
 
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Also im using bals max flex fibre https://www.tilersforums.com/forums/tile-adhesive/, and if i run out of that i have left over single part flexible that i used one my floor so ill use that on the non bath/shower walls (if i run out).
 

Andy Allen

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Do it as per tanking instructions...
Last bal tanking kit I used fresh plaster walls had to be primed and the primer was included in the kit...
 
J

J Sid

if there is no mention of what to do on plaster then in my book its not suitable and I'd use one that is
 
OP
M
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if there is no mention of what to do on plaster then in my book its not suitable and I'd use one that is

Thanks, thats a good point. The tech sheet says its suitable on the following:

-concrete
-cementitious screeds and screeds made using special binders
-plasterboard (for internal applications only)
-existing coatings in ceramic, terrazzo and stone
-cementitious render

I assumed plaster falls under the cementitious render category.
 

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