Designed specifically for all muzzleloaders, the all new Remington MZL Bore Cleaner provides an express clean, removing carbon, plastic and fouling while minimizing build up. 4 oz. squeeze bottle. Removes carbon, plastic and fouling. Safe for all bores. Minimizes fouling build up. Convenient nozzle tip applicator - no waste. Biodegradable, industrial strength cleaner. Applied to fiber free Remington MZL Premium Patche.