to prime or not to prime!!!

[grumpygrouter]

Bit of a thread hyjack this, but its not worth starting a new one for, i,ve a kitchen floor to do tomorrow 9 sqm, ceramic on concrete, i have various makes of adhesive left over from other jobs, can i prime the whole floor in one make of primer or would it be better to maybe just brush and damp the floor with water, and this is gonna be a hassle but should the different adhesives not come into contact with each other to avoid any adverse chemical reactions?
Thanks Andy

Any specific reason why you want to prime concrete?

 

[Andy S tile]

When i went to see the job it looked a bit shiny i think there had been some lino down, just making sure it was ok, but i won,t bother primeing it or any concrete job ever again!! Less work is good for me Grumps!!

 

[grumpygrouter]

When i went to see the job it looked a bit shiny i think there had been some lino down, just making sure it was ok, but i won,t bother primeing it or any concrete job ever again!! Less work is good for me Grumps!!

One function that priming would help on concrete is to lock in any residual dust.

 

[sWe]

One function that priming would help on concrete is to lock in any residual dust.

And/or to prolong the open time and curing time of the adhesive.

 

[Rab78]

plaster board and ceramic and ceramic adhesive is okay not to prime.
plaster board and porcelain/marble etc, you use cement based adhesive (has to be mixed) the yes bond neat with pva, or at least 1:2parts water.

 

[grumpygrouter]

plaster board and ceramic and ceramic adhesive is okay not to prime.
plaster board and porcelain/marble etc, you use cement based adhesive (has to be mixed) the yes bond neat with pva, or at least 1:2parts water.

Have to disagree there Rab, PVA is genreally deemed not sutiable by the vast majority of adhesive manufacturers as a primer. Acrylic primers are what is recommended now. Granfix is the exception as they specify PVA for one of their adhesives.