JUHUAN 920 MULTI USE PU FOAM JUHUAN 920 MULTI USE PU FOAM is a one-component, self-expanding, ready-to-use, multi-purpose Polyurethane foam. The foam will expand and cure by moisture in the air. It is used for a wide range of building applications. It is very good for filling and sealing with excellent mounting capacities, high thermal and acoustical insulation. It is environmental friendly as it does not contains any CFC materials.