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

1 Answer 1


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.

  • I understood PVA was used to prime drywall. Is this also used for plaster walls?
    – RET
    Apr 2, 2012 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, 2012 at 16:19
  • @ChrisF does it matter if the old plaster is premix or setting type plaster?
    – jiggunjer
    May 21, 2015 at 18:46

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