Q: Can I put an oil based urethane on top of waterbased Varathane? A: Yes. Varathane is polyurethane, and oil based urethane can go over waterbased, provided the waterbased is fully cured and all the water is out of it. Do bear in mind that one of the reasons for using waterbased polyurethane is that [...]
Q: I was planning on using oil based wiping varnish atop waterbased stain. Do I need to use shellac in between? A: Nope. You can put oil based clear finish directly over any other finish, including waterbased acrylic, so there is no need for shellac or any other barrier coat between your waterbased stain and [...]
Q: If I seal or stain wood, can I go over it with polyurethane? A: Yes, if we are talking about oil based polyurethane. It will go over any sealer and any stain. Waterbased polyurethane will go over some sealers, including SealCoat, and some stains, including virtually all waterbased but only some oil based stains.
Q: My oak wood floor was refinished in the spring of ’06 before moving to this house. Now the surface is gone where we walk and needs to be refinished again. The contractor claimed three coats of oil polyurethane were applied. We have dogs and cats and considering the layout I will need to refinish [...]
Q: I want to refinish my cabinets with a waterborne sealer and topcoat but I want to use an oil-based wiping stain. Will the oil-based stain adhere to a waterborne sealer? A: It’s possible the correct question is just the opposite; will waterborne sealer adhere over oil based stain, and the answer is a definite [...]
Q: Would you apply waterbased pore filler directly onto wood or give it a wash coat of something like shellac first? A: With most waterbased fillers, you can do either, but there are reasons to go one direction or the other. If you are not staining the wood prior to filling, and don’t mind the [...]
Q: I know that in USA you have three pore fillers: oil based, waterbased and clear filler. Here in Italy there are no such pore fillers. We have nitro pore filler sealer that is sprayed on, but the problem is that it does not fill pores. It is impossible for me to order solvent based [...]
Q: How long does waterbased polyurethane stay wet on a floor, so that I don’t have the risk of ridges forming? A: It depends on the temperature and humidity, but even under the best of circumstances, waterbased finish sets up very fast. That means you must work quickly to avoid ridges, and do not go [...]
Q: Can I use interior Varathane polyurethane in a bathroom where shower moisture may be a problem? A: Yes, but I would use oil based, not waterbased, in a bathroom. Incidentally, there is no difference in water holdout between interior and exterior. The differences are that exterior polyurethane is more UV stable, it may contain [...]
Q: I finished four restaurant interior oak doors with an oil stain and then a coat of Absolute Coatings’ Last ‘n Last Acrylic Urethane. It is very humid and the first coat blushed slightly, exhibiting a whitish haze which got slightly better as it dried, but was still noticeable. I rubbed down the doors with [...]
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