13 New build industrial units at simmonstone business park, burnley lancashire all steelworks intumescent Coated to pass building regulations. All units certificated on completion What is Intumescent Paint? Intumescent paints are specialist coatings that provide up to 120 minutes fire protection on structural steel. The paint reacts to high temperatures, typically above 200 C, by expanding up to 50 times its original thickness. This increase in volume and decrease in density provides insulation to the structural steel members against high temperatures and acts to delay or prevent structural failure in the event of a fire. Available as water based and solvent based coatings, intumescent paints are quick to apply and provide a smooth and durable decorative finish to structural steelwork in both internal and external locations.