Incombustible Hullboard

Incombustible Hullboard from Johns Manville is a lightweight, semi-rigid board insulation made from felted glass fibers in a nominal density of 2.9 pcf (46.5 kg/m3). Incombustible Hullboard is characterized by a low organic content, and was the first incombustible type hullboard to be developed for use in the marine industry.

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