Intumescent strip is a functional fire-sealing material. When exposed to high temperature or flame, it expands rapidly to form a dense heat-insulating carbon layer, blocking smoke and flame spread. It features stable chemical performance, good ageing resistance and reliable sealing effect. Easy for cutting and installation, it fits doors, windows and fire-proof assemblies. Custom sizes are available for construction, fire-protection and industrial fields to improve fire safety performance.
Automatically expands when exposed to high temperature fire, fills door gaps tightly without manual operation.
Forms dense charred barrier after expansion, blocks smoke, toxic fumes and heat transfer in early fire stage, delays fire spread.
Resist extreme fire temperature, non-combustible, no ash residue under long-time high-temperature burning.
Controllable linear expansion multiple; stable expansion ratio, no performance degradation under high-humidity ambient storage.
Soft base strip, easy to embed or paste into door grooves. Fits multiple door materials.
Support customization on material, dimension, color and cross-section to match different fire-rated door systems.
Fire-rated door sets: steel fire doors, wooden fire doors, fire-proof door frames, installed between door leaf & door frame, top/side door gaps.
Building fire compartment sealing for interior fire-separation doors.
Commercial & public buildings: office buildings, hotels, hospitals, shopping malls, schools.
Residential fire safety wooden entrance doors.
Shuangjing Village, Ligezhuang Town, Jiaozhou City, Qingdao City, Shandong Province, China
English
