We'll break down whether or not different kinds of polyurethane are waterproof for you.

It is said to be a drop-in replacement for conventional polyols, a main component of polyurethane flexible foams. The foams are lightweight, air-permeable, and their hardness, elongation, and density ...

Varathane’s water-based polyurethane can be touch-dry in as little as 30 minutes and is ready for a second coat after 2 hours, though full curing time is 3 days. The result is a hard, scratch- and ...