Ospho Rust Inhibitor

OSPHO is a rust-inhibiting coating. When applied to rusted surfaces, OSPHO causes rust to chemically change. An inert, hard substance that turns the metal black. Where rust is exceedingly heavy, two coats of OSPHO may be necessary. A dry, powdery, grayish white surface usually develops. Brush off any loose powder before painting. One gallon covers approximately 600 square feet.

Price and availability subject to prior sale.