incombustible
Refuses to catch
Incombustible means unable to catch fire or burn.
The term appears in technical contexts describing materials resistant to flame: asbestos was once prized for its incombustible properties.
The more common word is fireproof, though incombustible emphasizes the material's inherent nature rather than protective treatment.
Inactive, physically or chemically
- nonreactiveChemically inactive substance
- heatproofUnaffected by high temperatures
- refractoryResistant to heat/control
- fire-resistantSlow to catch flame
flame-resistant · heat-resistant · self-extinguishing · fireproof · flameproof
Fibrous fireproofing mineral
- fiberglassReinforced woven strand composite
- rockwoolFibrous stone-based insulation
- ceramicFired clay material
- gypsumHydrated calcium sulfate
concrete · brick · vermiculite · perlite · mineral wool · silica · slag · clay
Substance that slows something
- intumescentSwells from heat exposure
- coatingApplied surface covering
- barrierObstruction preventing passage
- insulationThermal transfer prevention
cladding · sheathing · liner · treatment · impregnation · spray · wrap · board
Oven for hardening clay
- fireplaceIndoor structure for burning
- chimneyVertical smoke passage
- fire doorFlame-resistant building partition
- fire wallProtective digital or physical partition
safe · vault · crucible · insulation · roofing · ducting · fire curtain · fire blanket
Flame endurance classification
- ignition pointTemperature causing combustion
- flashpointIgnition temperature threshold
- fire codeBuilding safety standards
- fire safetyPractices preventing burn hazards
compliance · certification · standard · inspection · regulation · classification
inert
Inactive, physically or chemically
- nonreactiveChemically inactive substance
- heatproofUnaffected by high temperatures
- refractoryResistant to heat/control
fire-resistant · flame-resistant · heat-resistant · self-extinguishing · fireproof · flameproof
asbestos
Fibrous fireproofing mineral
- fiberglassReinforced woven strand composite
- rockwoolFibrous stone-based insulation
- ceramicFired clay material
gypsum · concrete · brick · vermiculite · perlite · mineral wool · silica · slag · clay · adobe
retardant
Substance that slows something
- intumescentSwells from heat exposure
- coatingApplied surface covering
- barrierObstruction preventing passage
insulation · cladding · sheathing · liner · treatment · impregnation · spray · wrap · board · panel
kiln
Oven for hardening clay
- fireplaceIndoor structure for burning
- chimneyVertical smoke passage
- fire doorFlame-resistant building partition
fire wall · safe · vault · crucible · insulation · roofing · ducting · fire curtain · fire blanket · containment
fire rating
Flame endurance classification
- ignition pointTemperature causing combustion
- flashpointIgnition temperature threshold
- fire codeBuilding safety standards
fire safety · compliance · certification · standard · inspection · regulation · classification
incombustiblecombustible
Capable of burning
flammable · inflammable · burnable · ignitable · incendiary
flammable, combustible, combustion, combust, nonflammable, combustor, combustibility, noncombustible, non-flammable