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Best stain and clear sealant for wood window sashes and frames?

Best stain and clear sealant for wood window sashes and frames?

Old 04-12-06, 04:22 PM
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Best stain and clear sealant for wood window sashes and frames?

I'm interested in your opinions of the best wood stain products and sealants to use on wood window sashes and frames. This is on the inside of our windows.

We recently purchased 22 new Pella wood windows for our home and need to finish them. Ideally we would like the product to dry quickly as we have so many of them to do.

We have been told not to use polyurethane as it will breakdown from the UV rays.

Any suggestions for Stain and Sealant products would be helpful. Also any tips on techniques for performing the task are also appreciated.

Thanks so much.
Old 04-12-06, 04:40 PM
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As a window installer and finish carpenter, I frequently have to finish Pella wood windows. I use Minwax Wood Finish, then follow up with Valspar sanding sealer, lightly sand with 220 grit, then follow up with 1 or 2 coats of Valspar Polyurethane. (both oil based)

Whoever told you that polyurethane would "break down from UV" is exaggerating a little. Almost ALL finishes will eventually be affected by UV, but most products today contain UV inhibitors (polyurethane included) which help resist against damage from the sun.

Spar varnish is another type of finish that you might consider for windows. Some brands are for exterior use only- others can be used both inside and out. Spar Varnish holds up better on exterior surfaces, so it makes sense to consider it for windows too. We use polyurethane because we also use it on all the rest of our window trim and other millwork.
Old 04-12-06, 05:19 PM
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I don't think the brand makes a big difference. Minwax is a common brand of stain and IMO works better than a lot of other brands but most all brands of oil stain work fine.

I prefer to use varnish [oil base] IMO it is a little easier to work with than poly. Poly does dry a little harder. Both will work well. Any top brand of poly/varnish should preform well.

Contrary to popular belief varnished/polyed wood isn't a lifetime finish. Especially windows should be sanded [lightly] and recoated every so often. Depending on the amount of sun recieved a window might need a fresh coat of poly/varnish in 5 yrs but another window [in different location] might still be fine for 10 + yrs.

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