XHF307

The XHF307 is specifically engineered for high-specification fire doors that utilize deep-mortise groove systems. While standard surface-mounted seals may peel or shift, the XHF307 features a robust 18 mm profile designed to anchor securely into a 7.5 mm by 8 mm channel, providing an architectural-grade fit that remains flush and inconspicuous.

Precision Structural Reinforcement: The rigid PVC housing of the XHF307 acts as a protective armor for the sensitive intumescent core. In high-traffic environments, this prevents damage from mechanical impacts, moisture, and cleaning solvents. Under normal service conditions, the seal maintains the door’s acoustic integrity and thermal efficiency, while its deep-groove seating ensures it remains perfectly aligned through years of frequent swinging or sliding operations.

Dynamic Life-Safety Shield: When a fire occurs and ambient temperatures reach 200°C, the XHF307 transitions from a passive gasket to an active fire wall. At 246°C, the chemical core begins to expand, reaching full activation at 301°C. The material swells to at least three times its original thickness, creating a dense, pressurized char barrier. This physical “weld” plugs the perimeter gaps, starving the fire of oxygen and preventing the spread of flames and extreme radiant heat between building compartments.

Superior Smoke Path Eradication: Smoke inhalation is the leading cause of fatality in building fires. The XHF307 is laboratory-verified to maintain a smoke-tight seal for over 90 minutes. By blocking the migration of toxic gases through the door perimeter, it preserves visibility and air quality in stairwells and corridors. With a thermal endurance rating of 980°C for 30 minutes, this seal ensures that fire-rated assemblies remain a reliable barrier throughout the most critical stages of an emergency evacuation.