Intumescent coatings work by undergoing a chemical reaction when heated to form an expanded, thermally insulating layer. The coatings include an acid source — typically phosphorus-based, a carbon source, and one or more blowing agents dispersed in a suitable resin system.
What We Use
Intumescent coatings, often referred to as intumescent paint, are used in buildings as a passive fire resistance measure. They can be applied to structural members as an aesthetically pleasing fireproofing product. Some intumescent products can expand to more than 100-times the original thickness.