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Can you put an oil based polyurethane over the top of water-borne polyurethane?


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2012-03-07 02:24:13
2012-03-07 02:24:13

Yes, but the older finish must be completely dry before applying the new oil based top coat.

For furniture use fine steel wool to remove the glossy surface from the old finish to ensure proper adhesion between the two, oil and water based polyurethane. For hardwood floors it would be advisable to "screen" the floor with a buffer using 100 or 150 grit screens. You can rent a buffer for the short time it takes to screen a floor for around $40.00. Without roughing up the old poly the new poly will not have anything to grip and will begin to peel in a short time.

After you have vacuumed up the dust created by the screening process (for floors) wipe down the floors or furniture using mineral spirits or a solvent like denatured alcohol to clean the surface before you apply the finish. Use caution as both of these cleaning chemicals are extremely flammable.


Related Questions

Yes, as long as the polyurethane is oil-based.

You can apply "oil" based polyurethane over "oil" based enamel, you can also apply "water" based polyurethane over "water" based enamel, never mix the two, there's to much of a chance for problems.

Yes, that's common and should cause no problems.

No, acrylic does not adhere well to oil based finishes.

Yes, if your satin is also in a polyurethane or an oil based paint.

Only if you sand or prime the polyurethane first.

Yes, you can paint latex paint over polyurethane stain after applying an oil-based primer.

Just make sure the paint is completely dry before applying the polyurethane.

yes but you cannot put latex on top of oil based surfaces You actually are NOT advised to put oil over latex surfaces, which is why you're supposed to prime will an oil-based (alkyd) primer. Latex and Polyurethane should always have a layer of oil-base beneath it.

Yes. Waterborne alkyds are compatible with oil-based alkyds as long as the surface is clean and deglossed.

Yes, both oil and water-based polyurethanes will adhere well to an item coated with acrylic paint. If it is a polyurethane paint, dull the surface prior to painting. If it is a clear. realize that that oil based polyurethane will impart an amber hue while a water based polyurethane is crystal clear and will not affect the color.

yes as long as oil poly has cured at least 5 days

Yes you can; however, it will impart an amber hue on the surface.

Because it will impart a yellow cast to the paint surface.

Why would you WANT to do that? The performance of polyurethane paint is so far superior to that of latex it's not even funny.

No you cant ,you should never ever put water base over anything except oil base primer and any other water base paints.If you put water base paint over anything that is oil based it will never ever stick it will peal.People will tell you you can do it but they are wrong its bad voodoo

Yes, you can put polyurethane paint over eggshell in latex or eggshell in oil.

No, latex paint is made of water and polyurethane is oil based. If you know the saying, "Oil and water don't mix."

Yes. you can use a waterborne alkyd paint over a clean and deglossed oil based alkyd paint. If you want to put a water based acrylic of vinyl paint over an oil based paint, then you'll need to first de-gloss the oil based surface, either chemically or by using sandpaper, then apply an oil based primer as a bridge between the oil and water based paints. You can then use water based paint over the primer.

You have stated the difference in your question - one is essentially oil, the other is water.

Sometimes people do this to get an antique look, I can't think of any other reason to do this.

Yes, after ensuring that the surface is clean, oil-free and dull, apply an acrylic or oil-based primer as a bridge to accept the latex paint.

you should be able to. as long as the surface was prepared correctly for the latex to bond properly.

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