Fosroc Nitoprime Zincrich Zinc-Rich Primer for Steel Rebar (10 Ltr)

There's a catch with patch-repairing corroded reinforcement. Once you cut out the damaged concrete, clean the bar and recast, corrosion often starts up again right next to the patch, on the steel you didn't touch. The new repair shifts the electrochemistry and turns the next stretch of bar into a fresh corrosion site. Fosroc Nitoprime Zincrich is a zinc-rich primer made to stop that, protecting the exposed steel actively rather than just coating over it.

It works by galvanic action. The coating is loaded with metallic zinc, and zinc gives itself up to corrosion before steel does, so as long as the primer is on the bar it takes the hit instead of the reinforcement. That active protection is also what keeps corrosion from jumping to the steel just outside the repair, which is the failure that brings patch repairs back. It's a single-component primer that goes on ready to use, brushes on in one or two coats, and dries fast enough to keep a repair moving.

This is why it's the priming step in concrete repair systems, used on exposed reinforcement before Fosroc repair mortar goes back over it, and it also serves as an anti-corrosion primer on steel structures ahead of painting. It guards against chloride attack, the main driver of rebar corrosion in coastal and aggressive environments, and it bonds well under the topcoats and mortars that follow.

For reinforcement repair where the fix has to protect the bar and the steel around it, Fosroc Nitoprime Zincrich is the zinc-rich primer that actively fights corrosion instead of waiting for it.