Surface-Mounted Intumescent Fire Seal – Retrofit Strip for Fire Door Upgrades

Product Overview This surface-mounted intumescent fire seal is ideal for upgrading existing doors to meet fire safety codes without replacing entire frames. It offers fast and effective fire gap sealing.

Features Quick installation on existing doors Expands rapidly under fire exposure Strong adhesion to most surfaces No routing or grooving required.

Technical Specifications Material: Intumescent graphite + PSA Thickness: 2mm–5mm Expansion Temp: ~180°C Adhesive Type: High-tack acrylic Color: Brown, White, or Custom Length: Up to 2.1m per strip.

Applications Retrofit upgrades for fire doors Office and classroom entrances Historical building restoration Commercial property compliance.

Customization Options Roll or strip form Pre-cut lengths or spool Custom brand or fire rating print Color-match upon request.

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.