What should I use to prime an old plaster wall before skim-coating with new plaster?

Question

Should I use oil-based primer on an old plaster wall (as a bonding agent) before skim-coating new plaster over it?

ChrisF · Answer 1 · 2012-04-02 14:52:20Z

up vote 2 down vote

No, use a weak solution of PVA in water (5 parts water to 1 part PVA) instead.

Paint the wall with this and leave to dry, then re-skim.

answered Apr 2 '12 at 14:52

ChrisF♦
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	I understood PVA was used to prime drywall. Is this also used for plaster walls? – RET Apr 2 '12 at 15:42
	@RET You can use on old plaster too. We had the kitchen ceiling reskimmed and the plasterer used it, and we've used it to seal a bedroom ceiling before papering it. – ChrisF♦ Apr 2 '12 at 16:19
	Thanks, Chris!!! – RET Apr 2 '12 at 16:24

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