Should I have used SBR to prime on top of floor levelling compound - TilersForums.com

[RWB]

Hi all,


I've been reading all your helpful advice to everyone, so after tearing my hair out for most of the day thought I would sign up. Please could someone clarify if I should've used Cementone SBR on top of a self levelling latex floor compound. I originally stripped the old kitchen floor and all signs of adhesive etc. I then used SBR to prime and seal before applying the self levelling compound. This was down for a week and got a little dusty etc, so I decided to prime with SBR again. My initial reason for doing this was to stop the water getting sucked out of the adhesive (probably a stupid reason I guess). I used a 1 part water, 1 part SBR mix. The issue I have is that some areas seem to have formed a skin. Not massive areas, just the odd 3 or 4 inch patch here and there. I'm wondering if I shouldn't have used the SBR, or whether my mix was not diluted enough, thus leaving me with a bit of rubberising here and there due to it not sinking in. I plan to use a cement based adhesive over this, but am now worried as to whether I should try and remove the SBR, or maybe pour more self leveller over it and then tile directly onto that.


sorry for the immediate request for advice. I'm just at a loss as to what to do.


cheers
Rich

 

[gamma38]

No need to prime on top of self level.

 

[Dave]

The SBR to water ratio is too strong ... For priming porous substrates a 4:1 water to SBR would suffice ... If it's skinned then just sand it off.

 

[RWB]

Cheers for the quick response. I knew deep down I had messed up, so have nearly finished sanding it all off now. Will start tiling tomorrow. Thank you both for your advice, I won't bother priming this time, if only I'd done the 4:1 mix in the first place, a waste of a day.

cheers again,

Rich