BD 338 High-Performance Intumescent Fire Retardant Coating for Steel Structures
Engineered as a thin-film intumescent passive fire barrier that expands under heat to insulate structural steel members and delay failure during fires.
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BD 338 High-Performance Intumescent Fire Retardant Coating for Steel Structures is an advanced thin-film passive fire protection coating engineered for indoor and outdoor structural steel. Formulated with high-potency char-forming catalysts and fire-retardant synthetic polymers, it expands rapidly under high thermal exposure to create a dense, insulating carbonaceous foam layer that guards load-bearing steel against fire damage.
Designed for high-rise commercial complexes, modern airports, industrial plants, and public infrastructure tenders, BD 338 delivers exceptional fire endurance up to 2.5 hours with dry film thicknesses of only 1.8mm to 4.7mm. Its ultra-thin profile reduces structural load while providing outstanding weatherability, smooth aesthetic finishing, and tenacious adhesion.
Thin-Film High Fire Endurance
Achieves certified refractory protection from 1.0 to 2.5 hours at remarkably thin application layers (1.8mm to 4.7mm), significantly reducing structural dead weight.
Rapid Intumescent Expansion
Expands rapidly when exposed to flame, forming a thick, low-density protective foam-char layer that blocks severe heat transfer to steel components.
Indoor & Outdoor Environmental Resistance
Engineered for exceptional durability against moisture, UV radiation, and severe atmospheric exposure without cracking, chalking, or debonding.
Superior Aesthetics & System Compatibility
Provides a smooth, uniform surface that easily integrates with anti-corrosion primers and decorative topcoats for exposed architectural steelwork.
Product Parameters
| Property / Parameter | Technical Value / Specification |
| Product Type | Intumescent Fire Retardant Coating for Steel Structures |
| Execution Standard | GB 14907-2018 |
| Fire Resistance Limit | 2.0h to 3.0h (Adjustable based on construction thickness) |
| Dry Film Thickness | 1.8 mm to 4.7 mm |
| Compressive Strength | ≥ 0.1 MPa |
| Temperature Resistance | ≥ 500°C |
| Formulation Matrix | High-Potency Char-Forming Catalysts & Fire-Retardant Synthetic Polymers |
| Standard Packaging | 20kg / Pail |
| Flexible Packaging Options | 10kg Pail / 25kg Industrial Pail / Custom OEM Packaging |
Construction Process
- Complete rust removal, anti-corrosion and dedusting of steel structure substrate;
- Mainly constructed by mechanical spraying in layers with a single thickness of 3- 5 mm;
- Re-spray every 24 hours until reaching the designed thickness;
- Avoid impact and water contact during the curing period
Storage & Shelf Life
- Store sealed in a dry and ventilated warehouse, moisture-proof and rain-proof, prohibit caking;
- Store at normal temperature;
- Unopened shelf life: 12 months.
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