Intumescent and flame retardant coatings provide an appearance similar to that of standard coating finishes under normal conditions.
However, under excessive increases in temperature a chemical reaction occurs and the intumescent coating expands to many times its original thickness. This provides an insulating foam-like coating or char which protects the substrate.
When used in the protection of steelwork The intumescent coating is designed to insulate the steel, and prevent the temperature of the steel from rising to a critical point at which structural failure becomes possible.
Timber structures are more susceptible to the surface spread of flame and heat propagation. Intumescents are designed to reduce heat propagation, and reduce the spread of flame.
The use of Intumescent coatings therefore have a vital role to play in saving lives during a critical fire situation.
Johns of Nottingham are experienced applicators of products supplied by most of the UK's leading fire retardant coating manufactures.