XHM218F

The XHM218F series introduces a specialized “Butt Seal” configuration, meticulously engineered for doors where direct compression and impact absorption are as critical as fire protection. This 13 mm wide profile provides a robust, square-fronted interface that fills medium-sized architectural gaps, offering a sophisticated balance between mechanical durability and life-safety performance.

Dynamic Thermal Shielding: At the heart of the XHM218F is an intelligent intumescent material encased in premium-grade polyurethane foam. In daily operation, the butt-seal design provides a high-quality elastic interface that absorbs the kinetic energy of swinging and sliding doors, reducing frame wear and enhancing acoustic isolation. When temperatures surpass 200°C during a fire, the core activates, expanding to three times its thickness to create a pressurized, carbonized char that hermetically seals the 4.8–6.5 mm gap against flames.

Comprehensive Smoke Suppression: Statistical data highlights that toxic gas migration is the primary hazard in structural fires. The XHM218F is laboratory-verified to block smoke for over 90 minutes, ensuring that life-threatening fumes cannot bypass the door perimeter. By maintaining this critical seal under intense thermal stress, it keeps evacuation corridors and emergency exits clear, providing occupants with the maximum possible time for safe egress.

Industrial-Grade Reliability: Designed to endure thousands of cycles, the XHM218F utilizes a high-resilience foam that resists “compression set,” ensuring the seal returns to its original shape even after being compressed for long periods. With a thermal endurance rating of 980°C for 30 minutes, this seal ensures that your fire doors and windows remain a dependable barrier during the most extreme emergency scenarios, preventing ashing and structural failure when every second counts.