Johns Manville Microlite® Standard is a duct wrap made from flame attenuated glass fibers that delivers a high tensile strength core for improved handling and easy installation. It is available in plain or vinyl faced options and can be used where a vapor barrier is not required. This product provides a solution for a variety of applications that require improved thermal and acoustical performance.
R Value (Vinyl Facing): 3.9 (1.5")
R Value (No Facing): 4.3 (1.5")
Permeance Rating (Vinyl Facing): 1.3