Closed-cell glass — vapour-tight and fireproof
Foamed glass — the only insulation material that is simultaneously 100 % vapour-tight, completely non-combustible and able to withstand temperatures from absolute zero up to more than +400 °C. A premium material you mainly encounter offshore, on cryogenic pipes and beneath heavy roof decks.
Key figures
λ-value (10 °C)
0.038–0.050 W/(m·K)
Temperature limit
-260 °C to +430 °C
Fire class
A1 (completely non-combustible)
sd-value
≈ ∞ (fully vapour-tight)
Density
100–165 kg/m³
Typical brands
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