Insulrap JB is a self-adhesive multi-layer white PET/FOIL/PET zero perm membrane designed specifically for LNG and Cryogenic insulation systems. The product is constructed of a proprietary Polyguard butyl compound, which is a peel and stick self-sealing with excellent low temperature adhesion and flexibility, it can be installed down to 0ºF. 

Insulrap JB is designed specifically for Cryogenic insulation systems as an integral primary vapor barrier. A "Perfect Barrier" having a perm rating of 0.0000 perms; puncture resistance of 70 PSI, and elongation of 70%. Standard available roll dimensions are 35" x 75' and 4" x 50'; 23" x 75' by special order.

Insulrap JB has been tested for cold cyclical application on LNG type installations and is an integral component in Polyguard's Ultimate Corrosion Proof, Vapor Proof Insulation System.