Can You Use Polyurethane on Marble

Polyurethane Sealers: These topical sealers are produced for wood sealing purposes but some manufacturers recommend it for sealing natural stone as well which can cause serious harm to the marbles’s natural shine and leave an artificial glaze on the surface.

Can polyurethane be applied to marble?

Polyurethane Sealers: These topical sealers are produced for wood sealing purposes but some manufacturers recommend it for sealing natural stone as well which can cause serious harm to the marbles’s natural shine and leave an artificial glaze on the surface.

Can you put polyurethane on marble countertops?

Clean the countertop with a soft washcloth and take a 400-grit sandpaper. … Once the sanding is done, wipe the surface clean. Take a paintbrush and mix the polyurethane varnish. Apply the gloss varnish evenly and in long, straight strokes.