Another Frequently Asked Question

Should a newly plastered surface be sealed with PVA first before being painted?
If you're painting a kitchen or bathroom, where there's a lot of moisture, then it's a good idea to use an oil based paint such as eggshell. Before applying the paint, the surface should be sealed using a solution of PVA adhesive, normally 4 parts water to 1 part PVA.
But if you're painting a typical plastered surface in normal conditions then the plaster should be sealed using a watered down emulsion paint instead of PVA. The reason for this is because the newly plastered wall is so dry it will just suck all of the moisture out of your quality paint. That's why I'd recommend applying a cheap watered down emulsion first. www.plastering4u.com