Chemical Resistant Expanding Fire Seal Graphite Based Passive Fire Protection for Door Gaps

Intumescent Expanding Fire Seal Strip – Graphite-Based Passive Fire Protection for Door Gaps

Product Overview This expanding fire seal is made from intumescent graphite material that expands rapidly when exposed to heat, sealing gaps in doors and other structures to prevent the spread of smoke and flames.

Features Heat-activated expansion up to 30x original volume Self-adhesive backing for easy installation Durable and moisture-resistant Low-profile design compatible with standard frames.

Technical Specifications Material: Graphite-based intumescent strip Expansion Temperature: Starts at 180°C Expansion Ratio: Up to 30:1 Standard Widths: 10mm, 15mm, 20mm Thickness: 1.5mm–4mm Color: Black, Brown, White.

Applications Fire-rated wooden or metal doors Steel and timber frame construction Smoke control systems Server room, laboratory, and office partitions.

Customization Options Custom width, thickness, and length Color matching to door/frame Logo embossing or printed liner Combination with brush or smoke seals.

Shenzhen Xunzhi Building Materials Industrial Co., Ltd. is an integrated enterprise specializing in design, production, and sales, with many years of experience in manufacturing and technical product development. The company has two subsidiaries: Hong Kong Ruisong Technology Co., Ltd. and Sanya Ruisong Technology Co., Ltd. It is a professional manufacturer of door and window seals, curtain wall seals, and vehicle door sealing strips, providing one-stop rubber sealing solutions to global customers for many years.

We specialize in the production and processing of various sealing and molding products, including PVC (Polyvinyl Chloride), EPDM (Ethylene Propylene Diene Monomer), high-grade thermoplastic rubber (Santoprene), silicone rubber, dual-hardness sealing strips, rigid decorative strips, EVA single- and double-sided adhesive products for doors, windows, and curtain walls, as well as molded parts and plastic-rubber injection components.

The company is equipped with a strict quality assurance system, comprehensive testing procedures, and excellent after-sales service. Our products are highly recognized and praised by industry professionals, and are exported to Europe, America, Southeast Asia, and Hong Kong and Macao regions.