What are the application ranges of fire-retardant coatings?

Core applicability based on substrate type
The steel structure substrate is the primary application area for fire-retardant coatings, with the aim of enhancing the fire resistance limit of steel structures (which tend to soften and collapse at high temperatures).
Indoor steel structures: Use intumescent steel fire-retardant coatings (thin-coat type, with a coating thickness of 1–5 mm) that offer both decorative and fire-resistant properties. These coatings are suitable for factory beams and columns, steel components in office buildings, elevator shaft supports, and other similar applications.
Outdoor steel structures: Use a two-component, non-expanding fire-retardant coating (thick-coat type, with a coating thickness of 5–50 mm) or an outdoor-specific expanding fire-retardant coating. These coatings must also offer excellent weather resistance and corrosion protection, making them suitable for outdoor billboards, photovoltaic supports, steel components of bridges, container frames, and similar applications.
Special steel structures—such as high-temperature pipe supports and steel frameworks for chemical equipment—should use non-expanding, high-temperature-resistant fire-retardant coatings that can withstand prolonged exposure to high temperatures.

The concrete substrate is used to prevent the concrete from bursting under high temperatures during a fire and to extend its fire-resistance duration.
Applicable scenarios: Floor slabs of high-rise buildings, shear walls, tunnel linings, and concrete components in underground parking garages.
Recommended coating: Non-expanding concrete fire-retardant coating. The coating is dense and effectively restrains the thermal expansion of concrete, preventing cracking and spalling.

Wood-based substrates are used to reduce the combustibility of wood, prevent flame spread, and also serve as decorative elements.
Applicable scenarios: wooden furniture, wood flooring, wooden wall panels for log houses, decorative wood moldings, and wooden components of historic buildings.
Recommended coating: Single-component intumescent wood fire-retardant coating. It’s easy to apply and, when exposed to fire, expands to form a charred layer that effectively blocks oxygen and heat.
The core function of cable/wire substrates is to prevent fire from spreading along cable trays and to avoid the “fire bridge effect.”
Applicable scenarios: Cables in building distribution rooms, cable trenches in industrial plants, cables in mines, and cables for rail transit systems.
Recommended coating: Cable-specific fire-retardant coating, typically available as solvent-based or waterborne single-component coatings. The coating features insulating properties and forms an insulating char layer upon exposure to fire.