ISO Self-Expanding Sealing Tape (ISO-BLOCO 300/3-5) in gray is a high-performance sealing solution for both indoor and outdoor use. Its PU foam base enables self-expansion to fill 3~5mm gaps, offering reliable protection against wind, dust, and rain while retaining long-term elasticity. It also features steam diffusion, heat insulation, and sound insulation capabilities. The self-adhesive design simplifies installation, and it can be coated with standard latex paint, making it compatible with various building materials such as windows, metals, bricks, wood, and gypsum boards. Suitable for construction sites and all building types, it meets strict DIN EN ISO 9001 and DIN quality standards.