What is the coating on fireproof cable trays called

Fireproof cable trays are typically coated with intumescent or ablative fire-resistant coatings to ensure fire protection and durability.Common Coating TypesIntumescent Coatings: These are reactive coatings applied directly to the cable tray surface, often in a factory setting for consistent thickness and quality. When exposed to fire, the coating expands to form an insulating char layer, slowing heat transfer and protecting the cables underneath. Intumescent coatings are ideal for new installations, hygiene-sensitive environments, and hazardous areas where a smooth, cavity-free surface is required . Ablative Coatings: Ablative coatings, such as FLAMMOTECT-A, absorb thermal energy during a fire and release chemically bound water, creating a cooling effect. This process forms a protective layer that insulates the tray and reduces fire intensity. Ablative coatings are durable, suitable for both indoor and outdoor use, and provide additional resistance to environmental factors like UV radiation, moisture, and chemicals . Fire Wrap Systems: While not a coating in the traditional sense, fire wraps are multilayer passive protection systems installed around trays. They often include aluminized facings to reflect radiant heat and insulation layers to prevent fire spread. Wraps are commonly used in retrofit projects or areas where factory coating is impractical .Application and StandardsSurface Preparation: Trays must be cleaned of oil, dust, and rust, often using sandblasting or acid washing, to ensure proper adhesion .Primer and Topcoat: Primers with strong adhesion and anti-corrosion properties are applied before the fireproof coating. A durable topcoat may be added for weather resistance and aesthetics .Inspection: Coating thickness, adhesion, and uniformity are verified through tests such as cross-cut, pull-off, and combustion trials to meet national fire safety standards .SummaryFor fireproof cable trays, intumescent and ablative coatings are the primary materials used, providing reliable fire resistance, environmental protection, and compliance with safety standards. Fire wraps are an alternative for retrofits or special conditions. Selection depends on project type, installation environment, and maintenance considerations .