ISO Self-Expanding Sealing Tape (ISO-BLOCO 300/3-5) in black is a high-performance sealing solution for building joints and connections. Its self-expanding feature fills 3~5mm gaps, offering reliable protection against wind, dust, and rain while retaining long-term elasticity. It also enables steam diffusion and provides heat and sound insulation. The self-adhesive design simplifies installation, and it can be coated with standard latex paint, making it compatible with materials like windows, metals, bricks, wood, and gypsum boards. Suitable for various building types, it meets strict DIN EN ISO 9001 and DIN quality standards.