Classification of the surface combustion properties

The surface combustion properties of our HENSOTHERM® 490 KS, HENSOTHERM® 470 KS and HENSOTHERM® 370 KS fire-protection systems for steel were classified in accordance with the ASTM E84 (UL 723) testing standard. According to the indices for flame spread and smoke development, our products comply with the highest requirements of “Class 1” or “A” on combustible surfaces (e.g. Douglas fir) as well as on non-combustible surfaces (e.g. concrete slabs).