But what is polyurethane, and is it waterproof? Polyurethane is a chemical sealant for wood. It’s used to protect your wood floors and furniture from scratches, water damage, and other signs of ...

Seal the wood with a coating of polyurethane, varnish, or lacquer. Finish and waterproof wood simultaneously with a stain-sealant combo. When choosing the approach that’s right for you ...

However, only two types of sealants yield the best results: polyurethane-based sealants ... and provides excellent waterproofing, but it can be more expensive. One way to locate a windshield ...