OSPHO Rust Treatment is a professional metal surface preparation solution formulated to treat rusted iron and steel before painting. Its phosphoric acid-based formula chemically reacts with existing rust, helping convert the rusted surface into a more stable condition for subsequent coating applications.
OSPHO is especially useful when completely removing every trace of rust by mechanical methods is difficult. After loose rust, scale, dirt, grease, and other contaminants have been removed, OSPHO can be applied to the remaining rusted metal as part of the surface-preparation process.
Designed for marine, automotive, industrial, fabrication, restoration, and maintenance applications, OSPHO can be used on appropriately prepared ferrous metal surfaces such as equipment, trailers, structural steel, machinery, and other rust-prone components.
Once the treatment process is complete, the surface can be prepared for application of a compatible primer or paint according to the coating manufacturer’s instructions. Proper application and surface preparation are important for achieving the best results.
Key Features
- Phosphoric acid-based rust treatment
- Helps stop and treat existing rust
- Prepares rusted metal surfaces for painting
- Designed for iron and steel surfaces
- Useful for marine, automotive, industrial, and restoration work
- Ideal for equipment, machinery, trailers, and structural metal
- Helps prepare difficult rusted areas for refinishing
- Professional metal surface preparation product
- Available in 1 Quart (32 fl oz) and 1 Gallon (128 fl oz) sizes
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