3M Fire Barrier Plank PK39, a maroon, pre-formed foam plank, is designed to seal larger openings in through-penetration firestop systems and help maintain the integrity of fire-rated walls and floors. Each plank measures 39.37 inches in length, 5.12 inches in width, and 2.36 inches in thickness, and the package ships as 3 planks per case. This PK39 product is part of 3M’s Fire Protection line and is intended for use in commercial, industrial, and some residential applications where fire, smoke, and toxic gas containment across openings is required.
