OSPHO 1 Qt. Rust Treatment Brand_Mayfair accuracy and long cutting life

accuracy and long cutting life in metal cutting applications

Includes a metal wall hanger for mounting

half-mortise or for offset where door and jamb are not flush

Packaged in plastic squeeze bottles with fast fill spout

OSPHO 1 Qt. Rust Treatment Brand_Mayfair accuracy and long cutting lifeOSPHO is a rust inhibiting coating not a paint. OSPHO causes iron oxide (rust) to chemically change to iron phosphate an inert, hard substance that turns the metal black. Use on new metals, for new ferrous or aluminum metals. Is effective for exterior and interior work alike. Recommended for use under oil base primers and paints. Test a small area before using under epoxy or latex base paint. Covers approximately 600 Sq. Ft. per gallon. Normally