Thermafiber Top Stop 6# 3"x5"x7"x36"
Thermafiber® TopStop® Head-of-Wall Insulation
Provides fire containment in head-of-wall constructions. These products are non-combustible, moisture-resistant, non-corrosive, nondeteriorating, mildew-resistant, and vermin-resistant. Insulation used for TopStop® is UL® and Intertek® (formerly OPL) Classified, and is approved for use in designs that otherwise call for Safing Insulation. It is available in 3 common sizes of trapezoidal shaped boards, as well as standard forming strips.