acid source + carbon + spumific (typical APP/PER/MEL)
ChemistryIntumescent coating is specified as acid source + carbon + spumific (typical APP/PER/MEL). Density band wet film as specified.
What holds Intumescent coating together is not the nickname. Formula acid source + carbon + spumific (typical APP/PER/MEL), density wet film as specified.
Meters are atlas-relative. Grades are the SKUs buyers write.
Phases
Microstructure
OrderProcessing sets grain, crystallinity or fibre orientation — the reason two lots of Intumescent coating can test differently.
Interfaces
SurfacesCoatings, oxide films, sizings or paper faces often decide weather and fire behaviour more than the bulk brochure.
Defects
FlawsInclusions, voids, knots, pinholes or residual stress start the failures that mill certificates do not list.
Grades
VariantsIntumescent coating is a family. Grade names below are the ones buyers actually write on RFQs.
Ageing
TimeMoisture, UV, creep, hydrogen or carbonation shift properties in service. Design to the aged state.
Relative meters
Strength8
Strength is an editorial 0–100 mark relative to the other 31 materials in this atlas — not a laboratory certificate.
Heat envelope60
Heat envelope is an editorial 0–100 mark relative to the other 31 materials in this atlas — not a laboratory certificate.
Fire behaviour88
Fire behaviour is an editorial 0–100 mark relative to the other 31 materials in this atlas — not a laboratory certificate.
Insulation70
Insulation is an editorial 0–100 mark relative to the other 31 materials in this atlas — not a laboratory certificate.
Workability80
Workability is an editorial 0–100 mark relative to the other 31 materials in this atlas — not a laboratory certificate.
Circularity42
Circularity is an editorial 0–100 mark relative to the other 31 materials in this atlas — not a laboratory certificate.
Grades
Water-based cellulosic
Offices, ISO 834.Offices, ISO 834.
Solvent cellulosic
Shop application.Shop application.
Epoxy hydrocarbon
UL 1709, jets.UL 1709, jets.
Wood IFR
Interior timber.Interior timber.
Cable coatings
Circuit integrity.Circuit integrity.
Bonds
Primary bonding
Intumescent coating holds together by ionic/covalent networks.
Secondary forces
Hydrogen bonds, van der Waals stacks or grain-boundary cohesion set toughness and moisture uptake.
Composites & fills
Fillers, fibres, plasticisers or aggregates are part of the real product, not impurities.
Environment film
Oxides, chars, sizings or paints are the layer the world actually meets.
Change the grade, the coating or the moisture and you have a different material with the same English name.
Keep exploring
More in Fire performance
🏠
Gypsum board
CaSO4·2H2O panels that buy fire time by calcining — the everyday A2/A1 lining of interiors.
Overall 59 👨🚒Nomex
DuPont’s meta-aramid — fire-fighter turnout, electrical paper and a char that does not melt-drip like nylon.
Overall 65 🌡️Ceramic fibre
Spun refractory fibres for 1000–1400 °C — kiln linings, gaskets, and a respirable-fibre caution that AES grades try to ease.
Overall 62