Technical Data Sheet ## 4Exterior ultra-thin steel structure fireproof coating Water-based Fire Retardant Coating · Category: Fire retardant coating Intumescent water-based fire retardant coating for steel structures. Provides certified fire resistance up to 2.5 hours, expanding under heat to form a protective char layer that insulates steel from extreme temperatures. ## Key Features Fire resistance rating up to 2.5 hours Water-based, low VOC, low odor Compatible with most anti-rust primers Indoor and outdoor applications (with topcoat) Smooth finish, easy to spray, brush or roll ## Typical Applications Building steel structuresIndustrial facilitiesWarehousesOffshore platformsPower plants ## Technical Specifications TypeWater-based intumescentColorWhite / off-whiteSolid content≥ 65%Fire rating30-150 minutes (depending on DFT)Dry to touch≤ 2 hours @ 25°CAdhesionExcellent on primed steelVOC< 50 g/LCoverage1-2 m²/kg @ 1000μm DFT ## Application Notes Surface preparation: Remove all oil, grease, dirt, and loose rust. Abrasive blast to Sa 2½ (ISO 8501-1) for best results, or power tool clean to St 3 minimum. Apply on dry surface with substrate temperature at least 3°C above dew point. Mixing: Stir component A thoroughly, then add component B (if applicable) in the correct ratio. Mix with mechanical stirrer for 3 minutes until uniform. Pot life varies by product, typically 2 hours at 25°C. Application: Airless spray is recommended for best results. Brush or roller s