Water-Resistant Intumescent Fire Seal Strip – Expansion Barrier for Damp or Humid Environments

Product Overview Engineered for moisture-prone environments, this water-resistant intumescent fire strip maintains structural integrity and performance even in humid or wet areas.

Features Resistant to moisture, mold, and humidity Reliable expansion performance under heat Can be painted or over-sealed Compatible with wooden, metal, or composite frames.

Technical Specifications Material: Water-resistant Intumescent Graphite Activation Temp: Approx. 190°C Expansion Ratio: 20–25x Thickness: 2–5mm Widths: 10mm, 15mm, 20mm Certification: UL, CE compliant.

Applications Kitchens, bathrooms, and basements Hospital and cleanroom doors Storage and archive facilities Marine and coastal constructions.

Customization Options Waterproof backing layer Die-cut pieces for corners or profiles Printed warning lines or arrows Color-matching service.

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.