This fast sealing black epoxy sealant makes water-proofing surfaces an easy task. Comes in 3 pound jar for use on multiple surfaces and even dries underwater. Plenty of flex paste to complete a wide variety of DIY projects. Fill hard-to-reach gaps and cracks by simply pressing this flexible rubber adhesive into the nooks and crannies where leaks like to start. The super thick rubberized paste clings to the surface to coat and seal. Seal roof leaks or protect plumbing with this water-resistant and moisture-resistant sealant. Tub of paste requires no caulk gun to apply. Starts black in color and stays black when dry. Read entire directions before use.