ST. LOUIS, MO – Carboline is pleased to announce the release of Thermo-Sorb HB, a two-component, high-build, elastomeric intumescent coating for shop or field application rated for up to 3.5 hours of fire resistance for interior or exterior structural steel.

Based on patented elastomeric intumescent technology, Thermo-Sorb HB is ideal for demanding project conditions with outstanding resistance to damage from application and transit through to project completion. The solvent-based coating cures quickly, achieving weather resistance in just one hour to complement accelerated open-frame construction.

This combination of features makes Thermo-Sorb HB ideal for either shop or field application, providing essential flexibility for large-scale, fast-track construction projects.

"This new product enhances Carboline's industry-leading Thermo-Sorb portfolio, empowering construction and design teams to optimize fire protection solutions in a wider range of environments, fire durations, and segments to meet evolving project demands," said Michael Hollman, Global Intumescent Product Manager.

Thermo-Sorb HB meets or exceeds UL/ULC 263 (ASTM E119) and CAN/ULC-S101 testing and is listed for wide flange columns, tube columns, pipe columns, and restrained and unrestrained beams in the maximum allowable load condition or limit states design provisions. It is rated for up to 3.5 hours of fire resistance for certain designs.

Additionally, Thermo-Sorb HB contains innovative Optifire^® taggant technology, allowing for real-time traceability and warranty protection. Optifire technology assures performance because the pigments are detectable for the duration of the material's service life, from wet film and dry film to the resultant char after a fire.

"Formulating Thermo-Sorb HB to include Optifire traceability technology marks a novel advancement in the coatings industry, and in construction in general," Hollman said. "Most construction materials are only traceable from cradle to gate, with all visibility lost once they arrive on-site. By contrast, Thermo-Sorb HB with Optifire provides real-time traceability from cradle to grave, delivering comprehensive assurance for architects, inspectors, and owners."

Thermo-Sorb HB is available immediately across North America.

About Carboline

Carboline is a global manufacturer of high-performance coatings, linings, and fireproofing products based in St. Louis, Missouri, USA. Founded in 1947, Carboline owes its steady growth and high reputation in world markets to its commitment to advancing the science of coatings and solving customers' problems.

Media contact

Josh Coursey, 314-644-1000 x2273, josh.coursey@carboline.com