Overview
Jinyu Fireproof Coating is a technologically advanced passive fire protection solution developed by Beijing Jinyu Group, a leader in Chinese construction materials. As an intumescent coating, it chemically reacts to high temperatures (typically above 200°C) by swelling to form a thick, insulating char layer that protects underlying steel structures from rapid temperature rise. This delay mechanism provides critical evacuation time and maintains load-bearing capacity during fires. The product series includes both thin-film (≤3mm) and thick-film (≤5mm) variants, with formulations tailored for indoor (WB-1) and outdoor (SB-2) applications. It holds multiple certifications including China's GB 14907-2018 Class Fp1.50-A and meets international standards like UL 1709 for hydrocarbon fire resistance.
Physical and Chemical Properties
The coating's base chemistry comprises three functional components: an acid source (typically ammonium polyphosphate), a carbonific (polyhydric alcohols like pentaerythritol), and a spumific (melamine derivatives). When heated, these components react to generate non-combustible gases and a carbonaceous foam with thermal conductivity below 0.1 W/(m·K). The water-based version has VOC content <100g/L, while solvent-based variants achieve faster drying times. Key performance metrics include adhesion strength ≥1.5MPa (tested per GB/T 5210), corrosion resistance exceeding 500h in salt spray tests, and weathering durability of 10-15 years for exterior applications. The expansion ratio varies from 10:1 to 50:1 depending on specific product grade and fire exposure conditions.
Main Applications
Primary use cases focus on structural fire protection in commercial high-rises (especially exposed steel columns/beams), industrial plants (petrochemical facilities, power stations), and transportation infrastructure (subway tunnels, airport terminals). The coating is particularly valuable for architecturally exposed structural steel (AESS) where aesthetics matter, as it can be top-coated with decorative finishes. Specialized formulations serve niche markets: high-humidity versions for coastal projects, low-thermal-conductivity grades for cryogenic facilities, and ultra-fast-curing options for retrofit projects with tight deadlines. Recent innovations include transparent variants for heritage buildings and hybrid systems combining intumescent with cementitious fireproofing for multi-hazard protection.
Safety and Storage
While cured coatings are non-hazardous, uncured material requires standard chemical handling precautions: nitrile gloves, goggles, and organic vapor respirators for solvent-based versions. Workspaces need adequate ventilation (≥50cm/s airflow for confined areas) and ignition sources must be kept ≥10m away during application. Spills should be contained with absorbent materials like vermiculite. Storage protocols mandate original sealed containers kept upright, with water-based products protected from freezing (minimum 5°C) and solvent-based stocks stored away from heat sources (>35°C). Bulk procurement should consider seasonal temperature variations—summer deliveries may require climate-controlled transport if ambient temperatures exceed 38°C.
B2B Procurement Guide
Procurement professionals should verify four critical specifications: 1) Required fire resistance duration (30/60/90/120 minutes), 2) Environmental exposure conditions (interior/exterior/chemical), 3) Dry film thickness (DFT) requirements, and 4) Compatibility with primers/topcoats. Always request batch-specific test reports for expansion performance and bond strength. For large projects (>10 tons), consider factory pre-application services where Jinyu technicians coat steel components off-site under controlled conditions. This reduces on-site labor costs by 30-40% and ensures consistent quality. Payment terms typically include 30% advance, 60% on delivery, and 10% retention after acceptance testing. MOQs start at 1-ton pallets, with bulk discounts available for 10+ ton orders.
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