Fireproofing is rendering something resistant to fire, or incombustible; or material for use in making anything fire-proof. It is a passive fire protection measure. "Fireproof" or "fireproofing" can be used as a noun, verb or adjective; it may be hyphenated ("fire-proof").
Circuit integrity fireproofing of cable trays, using calcium silicate boards.
A combustible material is a material that can burn in air under certain conditions. A material is flammable if it ignites easily at ambient temperatures. In other words, a combustible material ignites with some effort and a flammable material catches fire immediately on exposure to flame.
DIN4102 Flammability Class B1 Vertical Shaft Furnace at Technische Universität Braunschweig, Germany
Sample Holder for DIN4102 Flammability Class B1 Vertical Shaft Furnace
German test apparatus for determining combustibility at Technische Universität Braunschweig
DIN 4102 B1 (difficult to ignite/often self-extinguishing) Silicone caulking used as a component in firestopping piping penetration