Built for the People
Who Build America
ThermoSeal LLC was founded around 2002 with a straightforward mission: make the best spray foam insulation in America and back it with exceptional support for the contractors who install it. For over two decades, that mission has driven every formulation decision we've made.
Our products (ThermoSeal 500, 800, HFO, and 5G) are engineered to meet the demands of real job sites. From residential attics to commercial warehouses, from interior walls in Connecticut winters to roofing systems in Florida summers, ThermoSeal is formulated to perform. We even offer winter blends of our closed cell products for cold weather applications.
In May 2024, ThermoSeal LLC was acquired by Spray Foam Holdings, LLC, a strategic move that expands ThermoSeal's resources, national reach, and ability to serve a growing installer network. The brand, the products, and the commitment to quality remain unchanged.
We are headquartered at PO Box 32, New Canaan, CT 06840, with distribution across the continental United States. Our team is available Monday through Friday, 9:00 AM to 5:00 PM EST, at 1-800-853-1577.