2mm Econo Underlay Blue, with 0.04mm plastic vapor barrier [with tape] – 4′ x 75′
Roll Size: 300 Square Feet
Thickness: 2.0mm
Thermal Conductivity: 0.20 BTU/Hr.Sq.In.
Water Absorption: 0.003 lbs per cubic feet
Fire Resistance: UL94 HFI, F.A.R. 25.83
STC Classification: 54 (ASTM E90-04)
IIC Classification: 51 (ASTM E90-04)