How to thin polyurethane?

Answer

Polyurethane comes in oil or water-based formulas. To thin oil-based polyurethane for any reason, you'll need paint thinner. If a desire to thin the polyurethane is for a lighter or more controlled finishing process, a mix of 1 part thinner to 2 parts polyurethane is recommended. For an even thinner coat, a 50-50 ratio can be incorporated. The same premise applies to water-based polyurethane, but water is used as the thinning agent. A word of caution for either formula is that polyurethane can vary by manufacturer, so add the thinning agent in batches to prevent permanently compromising the ratio.
Q&A Related to "How to thin polyurethane?"
1. Inspect the polyurethane finish after it is dry to the touch. Look closely, at eye level, across the surface of the dried polyurethane for any bumps or dust specks. Rest a razor
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1. Seal off the room containing the floor you want to sand by closing surrounding doors. Sanding polyurethane stirs up a lot of dust, you don’t want it to spread to other areas
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1. Put on a mask, protective eye wear and rubber gloves. Dip an old paintbrush into paint stripper. Apply a thick coat of the paint stripper to wood. Allow the stripper to sit on
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1. Apply the chemical paint stripper to the paint and polyurethane on the wood surface. Wait until the paint and polyurethane begin to bubble and peel. 2. Scrape the paint and polyurethane
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1 Additional Answer
To thin polyurethane, which is a oil-based product, you can mix it with mineral spirits or other types of solvents, such as Naptha and lacquer thinner. However, for best results, read the instructions that come with the polyurethane and use the recommend thinner for your particular product. You can find more information at www.woodweb.com
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