Is Mineral Oil Compatible with Polyurethane

If you used a non drying oil, such as mineral oil, your piece will not take a topcoat of lacquer or polyurethane in the future, no matter how long you wait. … Anything over 115 is a drying oil.

Can you use mineral oil over polyurethane?

Mineral oil will never dry1, so you need to strip it from the surface of the wood with a solvent before you can safely overcoat with a ‘drying’ finish — one that dries and cures, which includes polyurethane.

Can you oil over polyurethane?

Once varnish hardens and cures, it’s impenetrable. … This product contains tung oil, but because it also contains polyurethane, it’s a varnish. You can’t use it and pure tung oil on the same piece of furniture.