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Polytetrafluoroethylene — Insulation R Values
1582 to 1583 · 134.6 lb/ft³, 129.9 F, 1.76 W/mK
Polytetrafluoroethylene (block) thermal insulation performance data. ¼ in.. Tabulates tested across 2 mean temperatures from 62.7 to 129.9°F, densities 134.5–134.6 lb/ft³. Performance: thermal conductivity 1.76 to 1.77 W/m·K; R-value per inch 0.081 to 0.082 ft²·°F·hr/BTU/in.