EternaClean is formulated with a proprietary mixture of hot solvents, designed to "open" single-ply membranes and metals. 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. 14 oz.