DIYbanter - View Single Post - yellow plaster

On 31 Jan 2005 14:23:40 -0800, (simpi) wrote:

I attempted some plastering for the first time yesterday. I used
Wickes patching plaster on quite a small area 0.3m^2 -ish. I am
pretty sure the mix was a bit too wet. Anyway, this morning, there
were yellow stains in the plaster. Is this likely to be sulphur and,
more importantly, is it a problem? Should I hack it off and try
again?

It's a 30s house, the patch had the original wooden battens as a base.

Thanks.

This is a vey common problem, you just have to paint the yellow
patches with an oil based general purpose primer before you decorate.

Let the plaster dry first of course.