Seal it. Bond it. Insulate it. Isomat PU-Foam Thermo is a low-expansion polyurethane foam for precise sealing and strong adhesion. Ideal for fixing insulation boards, sealing around windows and doors, and filling cracks—without causing damage. Boosts insulation, cuts air leaks, and improves energy efficiency. Easy to use, clean, and reliable for both pros and DIYers.