What is the primary function of intumescent paints?

Intumescent paints are primarily designed for fire protection. When exposed to high temperatures, these paints undergo a chemical reaction that causes them to expand and form a thick, insulating layer of char. This expanded layer acts as a barrier that insulates the underlying material from the heat and can significantly delay the onset of material degradation, thus providing crucial fire resistance.

This ability to insulate against heat distinguishes intumescent paints from other types of coatings. While they may also provide a decorative finish or adhere well to various surfaces, their primary and most important function is enhancing fire safety by protecting structural elements. Understanding this specific purpose highlights the critical role intumescent paints play in building safety and compliance with fire codes.