EternaClean is formulated with a proprietary mixture of hot solvents, designed to "open" single-ply roof membranes and metals. It allows the surface to release contaminants like oxidation, grime, oil & grease, tree sap, etc... EternaClean leaves no residue, dries fast, and is non-chlorinating so it is environmentally friendly, and therefore legal, in all states. EternaClean prepares surfaces for the application of Eternabond Microsealant tapes as well as other sealants.