China Factory 750ml PU Expanding Foam for Thermal Insulation and Sound Reduction 1. Core Product Advantage Our All Season Polyurethane Expanding Foam is specially formulated for construction and maintenance applications throughout different seasons. With an application temperature as low as -10°C, the product offers greater flexibility for projects carried out in colder working conditions. 2. Practical Function Design The foam expands into narrow gaps and uneven cavities,