GAF Bulking Agent is a flexible high-tensile polyethylene fiber used as a general thickener for GAF coatings.
Basic Uses: GAF Bulking Fiber can be used to bulk up coatings to make them brush-able mastics. Thicker materials allow for fabrication of cants and filling around irregular surfaces. Excellent for flashing details, metal roof seams, inside and outside flashing details, round stacks, pipe legs, pitch pockets, conduit pipes, expansion joints, etc.
Packaging size: 15 lb bag.
Mixing: Add bulking fiber to coatings from 20% to 50% by volume.
Application: Apply evenly by trowel or brush.