One-part Flowable Multi-Purpose Non-Corrosive Silicone Sealant Black HC-691B Typical Features and Advantages of Multi-Purpose Waterproof Sealant HC-691B This silicone sealant is black in color, liquid form, easy to extrude, easy to apply, and Self-leveling. Good adhesion, capable of... 2024-10-31 Silicone Adhesives 182