Euroclass (reaction)
EN 13501-1 assigns a reaction-to-fire letter (A1–F, often with smoke and droplet suffixes) to a product as tested. It is not a wall, door or garment rating.
Reaction-to-fire letters and fire-resistance ratings answer different questions. The list below is an editorial atlas score, with the Euroclass string from each material when one is present.
🌡️ Ceramic fibre · 1260–1400 °C
Resistance (assemblies)
R, E, I and EI minutes describe how an assembly holds load, integrity and insulation in a furnace test. A material letter does not imply those minutes.
Fire performance
- 1 🌡️ Ceramic fibreFire performance · 1260–1400 °C Overall97
- 2 🪨 Mineral woolThermal · Euroclass A1 Overall96
- 3 💎 Technical ceramicsCeramics & wood · A1, extreme T Overall94
- 4 👨🚒 NomexFire performance · Meta-aramid Overall94
- 5 🏠 Gypsum boardFire performance · Type X / F boards Overall92
- 6 🏗️ ConcreteCeramics & wood · A1; cover saves rebar Overall90
- 7 🪟 GlassCeramics & wood · A1; integrity ≠ insulation Overall88
- 8 🧯 Intumescent coatingFire performance · fire Overall88
- 9 🍴 Stainless steelMetals · A1 Overall86
- 10 ☁️ AerogelAdvanced solids · Silica A1 Overall86
- 11 🔩 SteelMetals · Euroclass A1 Overall84
- 12 ✈️ TitaniumMetals · A1 / powder risk Overall80
- 13 🦺 AramidTextiles · Chars, little melt Overall80
- 14 🩺 NitinolAdvanced solids · A1 metal Overall78
- 15 🔶 CopperMetals · A1 metal Overall76
- 16 🥫 AluminiumMetals · A1 metal / melts Overall70
- 17 🫧 SiliconePolymers · Silica ash char Overall62
- 18 🍳 PTFEPolymers · High LOI; fumes Overall58
- 19 🏎️ Carbon fibreAdvanced solids · 230–600 GPa class Overall50
- 20 🐑 WoolTextiles · Self-extinguishing tendency vs. PE Overall48
- 21 📦 Vacuum insulated panelThermal · foil/PE skins Overall44
- 22 ⬡ GrapheneAdvanced solids · Not a FR board Overall40
- 23 🌲 WoodCeramics & wood · Chars; Euroclass D typical Overall34
- 24 🦋 SilkTextiles · Burns, little melt-drip Overall28
- 25 🧽 Polyurethane foamThermal · Not A1; PIR better than PUR Overall28
- 26 🪢 NylonTextiles · Melt-drip Overall26
- 27 🎽 PolyesterTextiles · Melt-drip Overall24
- 28 🕯️ Phase-change materialThermal · Paraffin burns Overall24
- 29 🌱 CottonTextiles · Burns; FR finishes exist Overall22
- 30 ☀️ Perovskite (PV)Advanced solids · lab >25% class Overall20
- 31 🛞 Natural rubberPolymers · Tyre piles burn hot Overall18
- 32 🧴 PolyethylenePolymers · Burns, drips Overall16