CRL Extend Rust Treatment can be used on any surface that is susceptible to rust. This professional treatment gives quality protection against rust for three to five years, after only one coat. Simply clean the surface with a wire brush and apply the treatment with a brush or roller, even to damp surfaces. Extend can be painted over in 48 hours, in most cases without a primer. Unpainted extend has a gray/black matte finish when dry.

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