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Expert's Corner — lamp

Polyurethane Won’t Dry

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If you experience oil-based polyurethane not drying well, it’s not likely that it’s bad polyurethane. It’s more likely that the wood you’re finishing contains a natural oil or you have applied an oil to the wood and the oil hasn’t dried. In both cases we’re talking only about the first coat of polyurethane. After the first coat has dried, there shouldn’t be any further drying problems. Most exotic woods (woods from jungle areas), with the exception of mahogany, contain a natural resin that is very oily. You can feel the oiliness. The mineral-spirits solvent in the polyurethane is also the...

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