FRtreated

FRtreated refers to materials that have been treated with fire-retardant chemicals to reduce their flammability. The treatment can slow ignition, restrict flame spread, and lower heat release, but it does not render the material fireproof or noncombustible. Fire retardancy is typically achieved by chemical impregnation, surface coatings, or modifications to the polymer matrix, applied during manufacturing or as a post-treatment.

Treatments fall into several chemical classes, including inorganic phosphate and borate systems, ammonium polyphosphate–based formulations, and nitrogen- or phosphorus-containing compounds. Some systems use intumescent coatings that form a protective char layer when exposed to heat. Halogenated flame retardants are less common today due to environmental and health concerns, with many jurisdictions favoring halogen-free, phosphorus- or nitrogen-based products.

FR-treated materials encompass a wide range of products, such as wood and plywood, textiles used in upholstery and drapery, plastics, insulation, and electrical cables. In construction and furnishings, FR-treated materials help meet fire safety codes and voluntary standards. Typical performance assessments include tests of flame spread, ignition resistance, and smoke development, with standards such as ASTM E84 (building materials), NFPA 701 (textiles), and EN 13501-1 used internationally.

Durability and maintenance vary by system. Some treatments are designed to withstand cleaning and aging, while others may leach or degrade with moisture, heat, or abrasion, potentially requiring re-treatment or replacement. FRtreated products should be used according to manufacturer guidance and local regulatory requirements.