... of polyurethane. Much of the firmer rubber used for various reasons is polyurethane, and because as an ... walls as extra padding, and in foam form for soundproofing. WarningFor the most part, polyurethane is not ... is heated to over 200 degrees C. For this reason, handling this polymer at high temperatures should be ... materials. It is often used as a coat for wood, plastic or other substances because of this ...