Frequently Asked Questions

Corroseal Rust Converting Primer chemically changes the composition of rust on steel, turning the rust into a non rusting barrier layer, while at the same time, primes the steel surface ready for topcoating. Watch our educational videos to see Corroseal in convert rust.

First remove any loose, flakey rust and old paint, mill scale and visible debris. Wash the surface thoroughly with a cleaner to remove any oil, grease or other contaminants. Thoroughly rinse the cleaned surface to remove any cleaner residue that may have been left behind. The ideal surface preparation is CLEAN, TIGHT RUST!

No. In fact, Corroseal Rust Converting Primer is very formula sensitive so DO NOT THIN!

Yes, but in most applications it is not necessary. An oil based primer is recommended if one is used.

Since galvanized steel is coating with zinc to prevent corrosion, Corroseal is not effective over non rusted galvanized steel. If the galvanized steel is rusted, do a test application to determine if there is enough rust present for Corroseal to be effective. The Corroseal will not bond properly if the galvanized steel is not sufficiently rusted.

Yes, but Corroseal works best when rust is present. Do not apply Corroseal over Cor-ten steel, cold rolled steel, stainless steel or any steel that has been chemically treated.

Yes, Corroseal will etch prime tightly adhered primer or old paint that is on the steel surface.

Yes, use an airless sprayer for less nozzle clogging. Corroseal must not be diluted. Immediately after application be sure to rinse spray equipment well with clean water to remove any Corroseal before it as a chance to set up.

It is recommended that Corroseal is used in a well ventilated area. If spraying, gloves, goggles and a mask are recommended because prolonged exposure might cause skin and eye irritation. Please refer to the Corroseal Material Safety Data Sheet for additional precautionary measures and disposal.

No, Corroseal Rust Converter is not considered “heat resistant”.

Some light colored water based paints are subject to tannin staining when the tannic acid in Corroseal is not fully absorbed during rust conversion. This usually occurs when the painting project has been exposed to direct sunlight on a warm day. If you see any staining, you should wash the painted surface with a mild solution of water and TSP, rinse well, then apply an oil based stain blocker before reapplying your topcoat. It’s best to always to do a test patch with your water based topcoat and Corroseal at least 24 hours prior to the start of any large scale project to determine if it’s subject to tannin staining.