JBY-668 Sigle-liquid foaming agent 1. Rapid expansion up to 20 times (max)after mixing with water 2. No shrinkage 3. 9kg JBY-668 Hydrophobic Polyurethane Foaming Agent For Waterproof Product DescriptionSingle-liquid type with simple construction, hydrophobic, non-chlorine ions Also, it can be rapid expansion up to 20 times (max) after mixing with water, no shrinkage and can be completely filling ...