let me explain it this way..............PVA drywall primer costs about $8 per gallon so what in gods name do you thinks in there ?? some mirical product that promotes adhesion and whatever else ??? lmao noooooooooooo its pure crap that's all it is an that's why its only $8 per gallon !!!!! if that crap actually did anything it would cost a hell of a lot more don't you think ??? like I said its cheaper then finish paint an that's why its used ...............I base coat with M.A.B wall sheild .........almost covers bare rock in 1 coat and ill give anybody $5,000 if they can peel it off after it cures lol . I find that flat finish seals the rock better then the so called ''Primer'' but whatever ...to each his own
Any professional painter will not use pva primer as it is garbage. A quality primer is going to cost up wards to $30 a gallon. There is no paint that will cover uniformally in one coat, especially over bare drywall with no primer. Primer serves one purpose and paint serves another purpose, but I like painters that don't apply primer or that only apply one coat of paint, because then the property owner usually calls a professional painting company to come and repair the first painters work when there paint job fails.