GT-NSF-Fp3.00 Indoor Non-Intumescent Fireproof Coating for Steel Structure

Overview
Indoor non-intumescent fireproof coating for steel structures, formulated to form a fire-resistant thermal insulation protective layer and reduce fire damage to load-bearing steel structures.​
The document states it does not corrode steel, does not chemically react with anti-corrosion primers, has no irritating odor, produces no smoke during fire exposure, and does not release harmful gases.​
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

• The document lists stations, docks, warehouses, stadiums, exhibition centers, and office buildings (application text in the file).​

Technical data (typical)

• Color: Gray.​

• Gloss: Matt (no gloss).​

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

• Shelf life: 12 months (shown in the physical data table).​

• Packaging: 20 kg/bag.​

• 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 not explicitly shown in the result cell); heat/cold cycling (15 cycles) insulation efficiency attenuation 3%; fire test: measured thickness 32 mm, steel beam span 5400 mm, test time 3.00 h, max deflection 29.80 mm, average temperature 523.98°C.​

Application data (25°C)

• Thinner: Water.​

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

• Spray equipment (as listed): continuous air supply pressure 0.6–0.8 MPa; spray gun nozzle diameter Φ4.0–6.0 mm.​

• Mixing ratio: coating : water : binder is referenced for spray and trowel application (numeric values are not shown in the provided table cells).​

• Wet mix usable time (as stated): wet material must be used within 2 h (given in the interface layer / trowel mixing notes).​

• Trowel application control (as stated): each pass thickness 6–8 mm; interval about 24 h between passes; keep the surface rough between layers to improve bonding.​

• 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 welding spatter and burrs, and round sharp edges.​

• Blast cleaning to Sa 2.5, or power-tool cleaning to St 3 to ensure steel is fully exposed and free of mill scale/oxide scale.​

• Apply coating within 5 h after surface preparation (as stated).​

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

System compatibility / packing / storage

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

• After the coating is thoroughly dry, two coats of decorative topcoat (tintable) may be applied to improve service life and appearance (as stated).​

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

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

• Packaging: 20 kg/bag.