Primer 57 is a single component, solvent-free, reactive monomer-based product designed to promote the cure speed of Hernon® anaerobic adhesives and sealants. Primer 57 is used where increased cure speed of Hernon® anaerobic products is required, and for difficult to bond applications where galvanized steel or zinc electroplated surfaces are involved. This product was specially formulated for increasing bond integrity on dichromated surfaces.