Polyurethane foam yield per can

750ml pu foam Sealant Introduction: The Mystery of Expanding 750ml PU foam sealant Polyurethane (PU) foam sealants are a staple in construction and DIY projects, but their expansion potential often leaves users guessing. A 750ml can claim to fill gaps efficiently, but how much foam does it produce? This article breaks down the science, real-world tests, and expert tips to answer this critical question—helping you avoid costly mistakes and maximize efficiency. 1. The Science Behind 750ml PU foam sealant PU foam expands through a chemical reaction between isocyanate and polyol resins, releasing CO₂ gas as it cures. The expansion ratio (liquid-to-foam volume) depends on: 2. Lab vs. Real-World Tests: What 750ml PU foam […]