XHM211F

The XHM211F series represents a specialized fusion of wide-format structural support and ultra-thin clearance engineering. Designed for high-specification architectural door sets, this 15 mm wide strip provides a larger bonding surface for increased durability while maintaining the delicate compression needed for gaps as small as 1.0 mm.

Intelligent Fire Partitioning: The XHM211F acts as a passive guardian that remains inconspicuous during daily operation. The soft polyurethane foam body provides a luxurious, dampened closing experience and effective weather sealing. However, when ambient temperatures reach the critical 246°C threshold, the internal intumescent core activates. It swells rapidly to fill the perimeter gaps, transforming the door into a solid fire barrier that physically blocks the “leapfrog” spread of flames and extreme radiant heat.

Critical Life-Safety Smoke Seal: Beyond flame containment, the XHM211F is engineered to combat the primary cause of casualty in structural fires: smoke inhalation. Verified through 90-minute rigorous fire resistance testing, the seal maintains a pressurized barrier that prevents toxic gases from migrating between compartments. This ensures that exit routes, such as stairwells and lobbies, remain visible and breathable for occupants and emergency responders alike.

Resilient Mechanical Memory: Reliability is built into the material science of the XHM211F. The polyurethane foam is selected for its high resilience and low compression set, ensuring that the seal does not permanently flatten over time. This long-lasting “spring-back” capability ensures that the 1-1.8 mm clearance is always perfectly filled, maintaining consistent acoustic, thermal, and fire-protective performance throughout the entire lifespan of the door assembly.