FIRESTOP 2 X2 X4 WOOL BACKER - Metacaulk 79001 Firestop 2 x 24 x 48 in. Mineral Wool Backing in Tan

Provides great thermal insulation performance for mechanical, power & process systems from sub-ambient to 1200F (650C). Thermal conduction gives control over heat loss for lower operating costs. Easy to handle, fabricate & cut with a knife- clean handling reduces irritation and minimizes clean-up/expense. Tested in accordance with ASTM E84, UL 723, CAN/ULC-S102-M. Boards have flame spread rating of 5 and smoke developed rating of 0. Faced insulation has flame spread rating of 25 and smoke developed rating of 5. Noncombustible in accordance with ASTM E136 and CAN4-S114-M and does not support fungi/mold.