Tremco ExoAir® LEF

Tremco ExoAir® LEF

ExoAir® LEF is a single-component, CFC-free, all-season, high performance, gun-grade polyurethane foam that performs as a thermal barrier.The ExoAir LEF is best suited around window and door frame joints but can also be used as an effective joint filler in hidden applications. LEF is most commonly used as a thermal and sound barrier. The product can be installed in temperatures ranging from 14 to 95° F.

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