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

Watch what happens when two liquids combine to form solid foam! 🧪 This is a polyurethane rigid foam system — made by mixing polyether polyol and isocyanate, which instantly react together. The reaction is exothermic, producing heat and gas that form tiny trapped bubbles, causing the material to expand rapidly in volume and harden into foam. 🔬✨ A fascinating look at chemistry in action — showing how everyday materials like insulation foam and cushions are made! #tool #scienceexperiment | Next W