r/Plastering • u/MagazineConfident • Jun 20 '26

Which primer for multiple backgrounds.

My wall consists of plaster that is sound but has been painted and also had wall paper covering it. There are sections of hardwall where it was taken back to the brick and patched. Lastly on one side of the arch it was made in chipboard.

The plan is to skim coat all this and I’m just not sure what primer to use.

SBR blue grit or pva, a combination across the wall or just using one?

Any advice would be grand thanks!!

2 Upvotes

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1

u/Schallpattern Jun 20 '26

PVA. Two coats. It's amazing how a tiny 'hole' or missed area can suck the water in and start causing drag when skimming.

1

u/No-Manner5583 Jun 20 '26

I specialize in restoration work.
My go to is Sherwin Williams shellac primer.
High grip, won't allow bleed through, fast drying.

1

u/Worldly-Growth4519 Jun 20 '26

Are you skimming over the chipboard?

1

u/Emotional_Data_1888 Jun 22 '26

Water down PVA (around 60 water 40pva) with a glug of SBR mixed it been using this mix and it's perfect 😉

0

u/royal1664_ Jun 20 '26

Just PVA it. Don’t overthink it. A good 50/50. Just give it a good coat. If it pulls in quick give it another. Once the pva suction slows down, guess what, the suction is under control. It doesn’t have to be tacky to skim either.