EZ~Spray Foam is a polyurethane foam compound that can be conveniently sprayed using Smooth-On's EZ~Spray Junior System. Foam cures quickly to strong, lightweight and impact resistant 12 lb. rigid foam that can be used for a variety of applications including making lightweight castings. Foam can also be sprayed over certain rubber mold configurations as a mother mold material. For more information, refer to Smooth-On's EZ~Spray Junior manual and video.