GT-WSF-Fp3.00 Outdoor Non-Intumescent Fireproof Coating for Steel Structure

Overview
Outdoor non-intumescent fireproof coating composed of lightweight thermal insulation materials, refractory cement, and inorganic hydraulic materials to form a fire-resistant thermal insulation protective layer on steel structures.​
The document states it does not corrode steel, does not chemically react with anti-corrosion primers, and does not generate smoke or release harmful gases when exposed to fire.​
The document states the product performance meets or exceeds GB 14907-2018 (Steel Structure Fireproof Coatings).​

Composition
Lightweight thermal insulation materials, refractory cement, and inorganic hydraulic materials.​

Typical uses

• Fire protection for outdoor steel structures such as stations, docks, warehouses, stadiums, exhibition centers, and office buildings.​

Technical data (typical)

• Color: Gray.​

• Gloss: Matt (no gloss).​

• Density / specific gravity: 0.4 kg/L.​

• Shelf life: 12 months.​

• Packaging: 20 kg/pail.​

• Coating theoretical (fire resistance requirement → thickness → number of coats → theoretical consumption): 3 h → ≥33 mm → 5–6 coats → 20–22 kg/m²; 2 h → ≥24 mm → 3–4 coats → 15–17 kg/m²; 1 h → ≥16 mm → 2–3 coats → 10–12 kg/m².​

• Key test results (as listed): bond strength 0.11 MPa; heat resistance 720 h attenuation 8%; damp heat 504 h attenuation 7%; freeze-thaw 15 cycles attenuation 2%; acid resistance 360 h attenuation 6%; alkali resistance 360 h attenuation 5%; salt spray (30 cycles) attenuation 5%; UV radiation (60 cycles) attenuation 6%; fire test: thickness 33 mm, steel beam span 5400 mm, fire test time 3.00 h, max deflection 29.59 mm, average temperature 521.31°C.​

Application data (25°C)

• Thinner: Water.​

• Application methods: Air spray and trowel application are stated.​

• Mixing ratio: coating : water : binder (by weight) is provided in the document separately for spray application and for trowel application (no numeric values shown in the provided text excerpt).​

• Practical construction notes (as stated): for trowel application, each pass thickness 6–8 mm; interval about 24 h between passes; keep the surface rough between layers to improve bonding.​

• Wet mix usage time (as stated): wet material must be used within 2 h (for interface layer / trowel-related mixing notes).​

• Curing/conditioning (as stated): after reaching design thickness and final set, keep moist curing for 7 days (water spray suggested); for fire performance testing, natural curing ≥35 days at 5–35°C.​

Surface preparation

• Prior to blasting: grind welds, remove spatter and burrs, and round sharp edges.​

• Blast cleaning to Sa 2.5 or power-tool cleaning to St 3; apply subsequent work within 5 h after preparation (as stated).​

• Apply at least two coats of anti-corrosion primer first; apply fireproof coating after the anti-corrosion primer is dry.​

System compatibility / packing / storage

• The document states no chemical reaction with anti-corrosion primers.​

• Storage: sealed and stored off the ground in a ventilated, dry place without direct sunlight; avoid moisture and rain ingress; storage temperature 5–35°C (as stated).​

• Shelf life: 9 months is stated in the storage section.​

• Packaging: 20 kg/pail.