Intumescent paint is a thin film coating applied to structural steel members to protect against fire. When activated by the heat of a fire the intumescent coating expands, generating a foam-like char that insulates the metal from the external heat, maintaining the structural integrity of the steel encapsulated within.
Most intumescent coatings are applied by spray, creating a quick, cost-effective method of achieving up to two hours of fire protection on structural steelwork.
Sensitive to temperature and humidity and with efficacy heavily dependent on application under optimum conditions, intumescent paint can be challenging to apply effectively, and the use of an accredited specialist with trained installers and a demonstrable testing process is highly recommended.