Sea Hawk Dewaxing Etching Cleaner, gallon. This water-based ultra-low VOC de-wax etch and cleaner is a concentrated formula which provides deep penetrating and lifting action for removal of tough surface contaminants. With its penetrating action, it is effective on wax, oil residues, surface soiling contaminants, and mold spores. In addition, S-90 etches the surface to promote good adhesion for primers and antifoulants while eliminating the need for sanding.