whitebeam

I've done site work for a contractor and never saw a bottle of primer although everything was dry lined, On a another job the walls was bucket gear (some tub gear state that no primer required) and that was on new plaster in a new private housing, Again no primer supplied. If your using cement addy on walls then it must be primed. I've used a mist coat of emulsion, artex sealer and sbr before and had no problems. The trouble with new plaster it's so absorbent and sucks the moisture from the adhesive giving it no time to cure properly, Thus giving in to failures at a later date.

"Experience is simply the name we give our mistakes"