Thermal conductivity λ is quoted in W/m·K: lower λ means better bulk insulation. Vacuum panels and phase-change systems are assemblies, not a single λ. Scores below are editorial 0–100 marks across this atlas.
📦 Vacuum insulated panel · λ thermal
Insulation · λ
- 1 📦 Vacuum insulated panelThermal · λ thermal Overall99
- 2 ☁️ AerogelAdvanced solids Overall98
- 3 🧽 Polyurethane foamThermal · λ thermal Overall88
- 4 🪨 Mineral woolThermal · λ thermal Overall86
- 5 🌡️ Ceramic fibreFire performance Overall80
- 6 🐑 WoolTextiles Overall72
- 7 🧯 Intumescent coatingFire performance Overall70
- 8 🌲 WoodCeramics & wood Overall56
- 9 🕯️ Phase-change materialThermal · λ thermal Overall52
- 10 🎽 PolyesterTextiles Overall50
- 11 👨🚒 NomexFire performance Overall48
- 12 💎 Technical ceramicsCeramics & wood Overall46
- 13 🧴 PolyethylenePolymers Overall44
- 14 🫧 SiliconePolymers Overall42
- 15 🌱 CottonTextiles Overall40
- 16 🛞 Natural rubberPolymers Overall38
- 17 🦺 AramidTextiles Overall36
- 18 🦋 SilkTextiles Overall34
- 19 🏠 Gypsum boardFire performance Overall34
- 20 🍳 PTFEPolymers Overall32
- 21 🪢 NylonTextiles Overall30
- 22 🪟 GlassCeramics & wood Overall28
- 23 🏎️ Carbon fibreAdvanced solids Overall24
- 24 🏗️ ConcreteCeramics & wood Overall22
- 25 ⬡ GrapheneAdvanced solids · λ Zero-gap semiconductor Overall18
- 26 ✈️ TitaniumMetals Overall14
- 27 🥫 AluminiumMetals Overall12
- 28 🩺 NitinolAdvanced solids Overall12
- 29 🍴 Stainless steelMetals Overall10
- 30 🔩 SteelMetals Overall8
- 31 ☀️ Perovskite (PV)Advanced solids Overall8
- 32 🔶 CopperMetals Overall6