ASMACO Universal Multi Foam Triple Expanding PU Foam Sealant is a one-component, ready-to-use moisture-curing polyurethane foam primarily used for sealing insulation sheets and filling joints and cavities in walls and ceilings. With a closed-cell structure, it is resistant to water absorption and offers excellent thermal insulation and very good acoustic properties. This foam is suitable for sealing high-volume, low-movement gaps and is CFC-free.