Polyurethane foam application. Polyurethane foam is mainly used for door and window installation, all kinds of gap-filling applications, sound and heat insulation, waterproof barriers, and fire insulation. #civilengineering #theconstructor #construction #civil #engineering #civilengineeringworld #civilengineer #engineer #engineers #building #civilconstruction #constructionlife #engineeringlife #constructionworker | The Constructor - Civil Engineering Home