Krud Kutter Brush Wash Cleaner and Renewer gallon. This brush wash is specially formulated to clean and recondition synthetic brushes and roller covers. Krud Kutter Brush Wash Cleaner and Renewer is safe, fast and effective on oil, latex and enamel paints, varnish, lacquer, shellac and polyurethane. It has no harsh fumes like other solvent based brush cleaners. This product contains a proprietary blend of biodegradable surfactants, detergents, and emulsifiers, in a water-based solution and has no petroleum solvents, bleach or ammonia. This works on direct-to-metal paints but should not be used on natural bristle brushes.