Flex Glue™ Max with even more coverage! Flex Glue™ Max comes in a 28oz cartridge and has even more instant grab. Flex Glue™ is an easy-to-use, super strong, rubberized, waterproof adhesive with instant grab and hold. Specially formulated to work on all types of surfaces and can be applied on dry or wet surfaces, even underwater! This adhesive’s instant grab technology holds objects in place and, in most cases, eliminates the need for braces. This tough, super thick waterproof glue is formulated for heavy duty applications. No need for screws or nails, it’s perfect for all types of repairs! Now any project big or small, with Flex Glue you can do them all.