The Hengs Liquid Roof Tape Liquid Seam Sealer is a thick, high-build, rubber-like liquid consisting of 100% silicone and microfibers. The unique properties allow it to replace traditional rubber and mesh seam tapes when used in conjunction with GacoRoof 100% Silicone Roof Coating. Liquid roof tape will fill cracks, voids and depressions; reinforce joints, seams, penetrations and transitions; and completely encapsulate fasteners and protrusions. The tape exhibits resistance to wear under light foot traffic. It is light gray in color, making it distinguishable from silicone top coatings. | Heng's Heng s Liquid Roof Tape Liquid Seam Sealer, 1 Gallon, Light Grey