KF-HF100 outdoor thick-film steel fireproof coating is a thick-applied fireprotective coating using inorganic binders (cement / gypsum, etc.) as binder and expanded vermiculite / expanded perlite as insulating aggregate. Application thickness 15-50mm (far thicker than the 2-7mm of thin-film types), delivering a fire-resistance rating of 3.0 hours or longer. Unlike thin-film intumescents, the thick-film type does not rely on expansion upon fire exposure; it achieves sustained, stable thermal insulation through its great physical thickness and the material's own low thermal conductivity (vermiculite / perlite conductivity ≈0.05-0.10 W/(m·K)). Especially suitable for outdoor steel structures (weather resistance required — thin-film types are not for outdoor use), buildings demanding very high fire-resistance ratings, and severe environments such as petrochemical and marine works. The surface is normally sealed and protected with a waterproof, weather-resistant topcoat.
TDS Technical Data Sheet – Outdoor Thick Steel Structure Fireproof KF-HF100
Technical Data Sheet · Outdoor thick-film fire protection of steel structures · KF-HF100
1. Product Description
2. Typical Applications
Suitable for coating protection in fields related to the fireproof / flame-retardant coatings category. For specific applications, please contact Kexin New Materials Technical Dept at 400-901-0757.
3. Technical Parameters
| Product type | Two-component solventborne coating |
|---|---|
| Color | Any colour to order |
| Gloss | Semi-gloss (30-60 GU) |
| Volume solids | 50±5% |
| Recommended DFT | 30-100 μm/coat |
| Theoretical spreading rate | 5-15 m²/L |
| Mixing ratio | A:B=4:1 |
| Pot life | 4h(20°C) |
| Surface dry time (23°C) | ≤2h(23°C) |
| Hard dry time (23°C) | ≤24h(23°C) |
| Full cure | 7 days (23°C) |
| Application temperature | 5-40°C |
| Relative humidity | <85% |
| Flash point (closed cup) | approx. 25°C |
| Density (mixed) | approx. 1.4 kg/L |
| VOC content | <420 g/L |
| Adhesion | Grade 0–1 |
| Packaging Specs | 20 L drum |
| Shelf Life | 12 months(original sealed) |
| Salt spray resistance | ≥500h |
| Standard | GB/T 25263 / ISO 12944 |
4. Application Guide
Surface preparation
Thoroughly clean the substrate surface to remove oil and rust. Abrasive-blast steel to Sa2.5 (ISO 8501-1) with 40-75μm surface profile. Concrete substrate moisture content must be below 6%, grind to remove laitance. For old coatings, remove loose areas and roughen the surface.
Mixing / compounding
According to the mix ratio indicated on the product label, add the hardener (component B) slowly to the base (component A) and mechanically stir for 3-5 minutes until uniform. Let stand to mature for 10-15 minutes before use. Use up within the specified pot life after mixing.
Application method
Recommended air spray (gun orifice 1.5-2.0 mm, pressure 0.4-0.6 MPa) or airless spray (nozzle 0.38-0.53 mm, pressure 15-25 MPa). Small areas may be brushed or rolled. Keep each coat dry film thickness within the specified range.
Curing conditions
Self-cures at ambient temperature (23°C) provided relative humidity meets requirements. Do not apply under low temperature (<5°C) or high humidity (>85%). Conduct performance testing only after full cure.
5. Packaging & Storage
| Packaging Specs | 20 L drum |
|---|---|
| Storage Conditions | Store at 5–35°C in a cool, dry, ventilated place away from ignition and heat sources; keep container sealed. |
| Shelf Life | 12 months(original sealed) |
| Transport | Transport as non-hazardous goods. In summer, ship in early morning or evening; avoid sun exposure. |
6. Health & Safety Notes
⚠️ Important safety notice
Read and understand the product's MSDS (Material Safety Data Sheet) carefully before using this product.
- Proper personal protective equipment (gloves, goggles, protective suit) must be worn during application
- Ensure the work area is well ventilated
- Keep away from fire and heat sources
- Avoid inhaling vapours and mist
- Avoid contact with skin and eyes
- If you feel unwell, stop work immediately and seek medical advice
Disclaimer
The data in this TDS are typical values and do not constitute product specifications. Actual product performance may vary depending on application conditions, substrate condition and environmental factors. Users are advised to conduct small-scale sample tests before bulk use to confirm product suitability.
Kexin New Materials continuously improves its products and reserves the right to modify the technical parameters without prior notice. For the latest version, please visit www.psste.com/thick-film-steel-fireproof-coating-tds/.
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