Flex Seal Flex Glue is an easy-to-use, super-strong, rubberized waterproof glue that instantly bonds, seals and repairs virtually everything. No need for screws or nails, it's perfect for all types of repairs. Can be used on dry or wet surfaces and even underwater. Strong instant-grab adhesive works like a magnet, locks into place and holds on tight. Adhesive Type: Liquid; Packing Type: Tube; Color on Application: Clear; Color Dried: Clear.