Overview
Gypsum-based fireproof coating represents a critical passive fire protection solution in modern construction. Developed as an alternative to cement-based fireproofing, it combines natural gypsum with proprietary fire-retardant additives to create a lightweight, spray-applied barrier. Unlike intumescent coatings that expand under heat, gypsum-based versions work through endothermic reactions and inherent fire resistance, making them particularly effective for structural steel protection. The material has gained prominence due to its environmental advantages, including lower embodied energy compared to cementitious alternatives and recyclability. Major certifications include UL listings and EN 1363-1 compliance, with typical fire resistance ratings ranging from 30 minutes to 4 hours depending on application thickness and substrate conditions.
Physical and Chemical Properties
The coating's performance stems from gypsum's unique chemistry - calcium sulfate dihydrate (CaSO4·2H2O) undergoes controlled dehydration when exposed to fire, absorbing significant heat energy while releasing water vapor. This endothermic process delays temperature rise in protected structures. Modern formulations incorporate ceramic fibers and vermiculite to enhance cohesion at high temperatures and prevent cracking. Key technical parameters include thermal conductivity of 0.2-0.3 W/mK (at 100°C) and pH values between 8-10 in slurry form. The material maintains dimensional stability up to 1200°C and demonstrates excellent adhesion to most construction substrates, with bond strengths typically exceeding 0.3 MPa. Unlike organic coatings, it doesn't emit toxic fumes during fire exposure.
Main Applications
Primary use cases focus on compartmentalization and structural protection in commercial buildings. The coating is extensively applied to steel columns and beams to maintain load-bearing capacity during fires, often specified in high-rise buildings, industrial facilities, and transportation hubs. Its smooth finish makes it preferable for visible structural elements in architecturally sensitive projects. Secondary applications include fireproofing of drywall systems, where it enhances the inherent fire resistance of gypsum boards. Specialized versions are used for protecting electrical conduits and ventilation ducts. The material is particularly valued in seismic zones due to its light weight (typically 30-40% lighter than cementitious alternatives), reducing structural loads while providing equivalent fire protection.
Safety and Storage
While gypsum-based coatings are generally safer to handle than solvent-borne alternatives, proper precautions are essential. Dry powder should be stored in original packaging on pallets, protected from humidity which can cause premature setting. Ideal storage conditions maintain relative humidity below 60% at 10-25°C. During application, standard personal protective equipment (PPE) including N95 masks and goggles is recommended to prevent inhalation of dust particles. The material is non-hazardous once cured, with no VOC emissions. Disposal of waste material should follow local regulations for gypsum products, with many regions allowing recycling into new gypsum products if uncontaminated.
B2B Procurement Guide
Professional buyers should prioritize three key factors: certification testing (request third-party fire test reports matching your project requirements), application efficiency (coverage rates typically 1-1.5 kg/m² per hour of fire resistance), and compatibility with finishing systems. Bulk purchases (20+ metric tons) often qualify for 10-15% discounts from major manufacturers. Technical specifications should explicitly state required fire rating duration, substrate preparation requirements, and environmental conditions during application (temperature/humidity ranges). Leading manufacturers include USG, Knauf, and local producers with EN 13501-1 or ASTM E119 certifications. Sample testing is recommended to verify workability and drying characteristics before large-scale procurement.
Related Manufacturers
- 主营：薄型防火涂料、钢结构防火涂料、室外薄型防火涂料、室内钢结构防火涂料、超薄型防火涂料、膨胀型钢结构防火涂料、膨胀型防火涂料、超薄型钢结构防火涂料、室内膨胀型防火涂料、室外膨胀型防火涂料、薄型钢结构防火涂料、石膏基钢结构防火涂料、隧道防火涂料、电缆防火涂料、室内薄型防火涂料、钢结构薄型防火涂料、非膨胀型石膏基防火漆、薄型超薄型防火漆、薄型钢结构防火漆
- 主营：防腐涂料、防水涂料、钢结构防腐涂料、防火涂料、非膨胀钢结构防火涂料、膨胀型薄涂防火涂料、防水装饰一体化涂料、高聚物改性沥青涂料、乙烯基酯改性防腐涂料、水性聚氨酯面漆、氟碳面漆、水性钢构面漆、水性高分子防腐涂料、环氧煤沥青防腐涂料、LM复合防腐防水涂料、聚氨酯沥青防腐涂料、氰凝防腐防水涂料、隔音涂料、隔音吸音涂料、水泥基渗透结晶防水、纳米反射隔热涂料、隔热涂料、铁锈转化剂、彩钢瓦翻新涂料、三防一体钢构金属漆
- 主营：灰色防火涂料、白色防火涂料、钢结构防火
- 主营：国标防火泥、防火包、防火板、钢结构室内外防火涂料、电缆防火涂料、隧道防火涂料、厚型石膏基防火涂料、薄型膨胀型防火涂料、室内外钢结构防火涂料、国标钢结构防火涂料、特种钢结构防火涂料、透明防火涂料、饰面型防火涂料、柔性有机防火泥、厚型水泥基、无机堵料、防火隔板防火板
- 主营：防火泥、幕墙防火漆、阻火包、钢结构防火涂料、膨胀型防火涂料、非膨胀型防火涂料、阻火模块、弹性防火漆、柔性有机堵料、汽车灭火毯、高分子封堵剂、阻燃剂、硅酸钙板、耐火砖、防火板、防火堵料、硅胶布、玻镁板、防火布
- 主营：蛭石、海泡石、矿物纤维、防火涂料、漂珠、石油焦、石墨颗粒、云母粉、火山球、重钙、滑石粉、轮胎粉、钾长石、叶腊石、氧化铝、碳酸钙
- 主营：非膨胀型钢结构防火涂、防火胶泥、防火泥、防火涂料、钢结构防火涂料、膨胀型钢结构防火涂料、薄型钢结构防火涂料、电缆防火涂料、膨胀型防火涂料、阻火包、防火模块、防火无机堵料
- 主营：L型防火隔板、防火包带、防火防爆毯、防火涂料厂家、薄型钢结构防火涂料、钢结构防火涂料、室内外钢结构防火涂料、高分子防潮防凝露封堵材料、高强度防水防火发泡胶、纳米复合长效防污闪涂料、防火泡沫胶、泡沫封堵材料、弹性密封防火胶、纳米防污涂料、电力高分子防潮封堵剂、高分子防潮封堵剂、高强度防水发泡胶、B组泡沫封堵材料、PRTV防污闪涂料、防凝露封堵剂固化剂、电力泡沫封堵材料、纳米复合加强型防污闪、防凝露气密封堵料、缝隙封堵材料、幕墙层间缝隙防火漆
- 主营：阻火包、防火槽盒、防火角条、电缆防火涂料、防潮封堵剂、防火涂层板、防火密封胶、柔性有机堵料、防火封堵板材、无机防火堵料、电缆用防火包带、自粘性阻燃包带、长效防污闪涂料、电力防污闪涂料、防污闪涂料、绝缘子防污闪涂料、防火防水发泡胶、发泡型防火密封胶、膨胀型防潮封堵剂、AB组泡沫封堵材料、高强度发泡胶、防火发泡胶、防火阻燃发泡胶、墙面防火发泡胶、高分子柔性防潮防火封
- 主营：防火防爆毯、L型防火隔板、防火板、钢结构防火涂料、防火涂料、薄型防火涂料、厚型防火涂料、薄型钢结构防火涂料、超薄型防火涂料、防污闪涂料、电缆防爆毯、高分子防潮防凝露封堵材料、高强度防水防火发泡剂、泡沫封堵材料、高分子封堵材料、高分子防潮封堵材料、高分子防凝露封堵材料、纳米防污闪涂料、电缆接头防火毯、L型电缆防火板、电缆防火防爆毯、AB组泡沫封堵材料、高强度防水防火发泡胶、防水防火发泡胶、L型防火板
- 主营：隧道面漆、防火泥、防火板、钢结构防火涂料、薄型防火涂料、厚型钢结构防火涂料、薄型钢结构防火涂料、石膏基钢结构防火涂料、油性防火涂料、水泥基钢结构防火涂料、超薄型钢结构防火涂料、饰面型防火涂料、隧道防火涂料、电缆防火涂料、阻火包
- 主营：防火泥、幕墙防火漆、防火槽盒、膨胀型防火涂料、非膨胀防火涂料、钢结构防火涂料、L型防火板、弹性防火漆、阻火包、硅酸钙板、柔性有机堵料、阻火模块、洁净板、防爆板、汽车灭火毯、冰火板、高分子封堵剂、耐火砖、防火板、防火金属板、阻火包带、防火堵料、硅钛布、玻镁板、抗爆板
- 主营：氧化铝、海泡石、刹车片、防火涂料、矿物纤维、重晶石粉、冶金铸造、材料冶金、蛭石颗粒
- 主营：氧化铁颜料、铁粉、膨润土、石膏基防火涂料、珍珠岩、矿物纤维、木质纤维、硅酸铝纤维、海泡石纤维、云母粉
- 主营：环氧玻璃鳞片涂料、聚脲腻子、环氧腻子、石膏基防火涂料、玻璃鳞片胶泥、环氧胶泥、PTU防水自粘卷材、乙烯基防腐涂料、乙烯基玻璃鳞片胶泥、环氧树脂、乙烯基树脂、环氧砂浆、环氧涂料、3301树脂、玻璃钢树脂、环氧玻璃钢树脂、环氧富锌底漆、环氧云铁中间漆、丙烯酸聚氨酯面漆、环氧沥青漆、环氧重防腐涂料、环氧稀胶泥、环氧玻璃鳞片、彩钢瓦漆、聚酯砂浆
- 主营：非膨胀型钢结构防火涂、阻火模块、防火泥、防火涂料、钢结构防火涂料、隧道防火涂料、厚型防火涂料、膨胀型防火涂料、水性防火涂料、油性防火涂料、薄型防火涂料、厚型钢结构防火涂料、特种防火涂料、石膏基防火涂料、饰面型防火涂料、电缆防火涂料、室内膨胀型钢结构防火、阻火砖、柔性有机堵料
- 主营：石油焦、蛭石、云母、防火涂料、海泡石、矿物纤维、漂珠、重晶石、氧化铝、增碳剂、橡胶颗粒、膨润土、石墨颗粒、高岭土、钾长石、滑石粉、轮胎粉、膨胀石墨、重钙、轻钙、硅藻土