1/4″ x 4′ x 140′ Rubber Pipe Insulation Roll with Adhesive Backing. R Factor: 1.5. Flame Spread Rating & Smoke Rating: <25/50. Will Not Contribute Significantly To Fire. Thermal Conductivity – 90°F (32°C) Mean Temp: .258, 75°F (24°C) Mean Temp: .245, 32°F (0°C) Mean Temp: .235 . Water Vapor Transmission: <.01. This Insulation Meets: ASTM C411, ATSM C177, ASTM E96, ATSM C209, ATSM E84, ATSM G21, UL 181, ATSM C1304, ATSM C665, ATSM D1171, ATSM D1667, ATSM C534, ATSM D635, ATSM D1056, ATSM G90, ATSM E90.
