PL, 10 OZ Cartridge, Black, Polyurethane Roof & Flashing Sealant, Commercial Grade, Provides Permanent Flexible Seal, Forms Elastic Seal For Active, Moving Joints, Solid, Strong, All Weather Surface Adhesion, Excellent For Metal Flashing, Skylights, Fascia & Shingle Tabbing, Water/Weatherproof, Flexible Seal, Meets Or Exceeds Federal Specification TT-S-00230C, Type II Class A, ASTM C-920, Type S, Grade NS, Class 25, Use T, M & A.