Latest Discussions : Painting


03:03PM | 06/16/14
I applied 2 coats of paint and primer and let dry for 2 days. I then applied a coat of spray on polyurethane , satin finish. After it dried some areas were yellow. I then sanded it down and applied another coat of my color, let that dry 2 more days. I bought a can of minwax satin finish polyurethane and applied 2 coats. Again there are yellow areas. I have down several painting projects and this is the first time I have had this problem.

What caused it and what should I do now to get rid of the yellow areas?

Thanks, Sandy


11:23AM | 06/17/14
Oil-based polyurethane causes yellowing of white paint. It looks like the Minwax Satin Finish Polyurethane might be oil based, true? If so, I'd sand it down again (annoying, but necessary) and try again with a water-based poly. Then again, you might do well to just paint a few coats of satin finish paint instead of poly it, depending on what you're painting/what color you're using but that won't protect well if it gets a lot of use. Hope that helps!


03:29PM | 06/18/14
The polyurethane was actually water based, not oil. I think i will just sand and apply several more coats of the color. If you have other suggestions I;m open. Thanks Sandy


02:28PM | 06/23/14
Oh—it is water-based after all? Well, I'm stumped. I know white paint can be picky about polyurethane but don't have personal experience working around it. Anyway, if you find something that works, share the knowledge.


08:17PM | 09/21/15
Does polyurethane turn yellow when put over wood stain?


01:23PM | 06/02/16
I want to paint and poly my cement floors but am hesitant cause I'm afraid the poly will yellow over time. Is there anything else I can use to protect the floors that won't yellow?


10:39AM | 06/10/16
Buy the epoxy and do it right. Polyurethane isn't going to hold up well. And all polyurethane will yellow. Whether it be water based, oil based, oil modified water based, etc. They'll all yellow. Polyurethane sucks. Esp when you paint something really nice, then make the mistake of thinking, "Oh, I'll put a coat of poly on it to protect it." Wrong move... Every time.


01:17PM | 11/22/16
I sanded the table but the polyurethane stain penetrated the white paint underneath the table looks brownis


12:09PM | 01/01/19
Birchwood being used to build wall unit. Will be stained with MINWAX when done. Debating if I should leave it without polyurethane or polycrylic so it shouldn't yellow. Room gets very dusty not sure how well plain stained wood will hold up from constant cleaning.


05:12PM | 02/17/19
if you wet the bare wood [birch white pine] that amber color will be the same as when you apply an oil based poly! to keep the hue the same on a softwood use a water based acrylic now on hardwoods[hick oak] both poly and acrylic will shade the same as when you dampen the to get the hue look !! now let the wood dry before coating


03:30AM | 03/22/19
Water based poly will show yellow if the application is put on too thick rather than thin coats...especially over white paint, sand down and start over,many coats and patience is better than one thicker coat...


08:14AM | 06/09/19
Both epoxy and poly yellow. In order to keep both from yellowing is thin layers and sanding. Be patient use thin coats sand with steel wool pads or 380-400 sand paper. Clean very well after sanding. If paint is water base use water base poly. Hope this helps.

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