Musket Black Powder Cleaner-Lube - 4oz Bottle Special Pricing Compatible with all metals, composites, surfaces & non-hazardous (flash point above 450F). Bullet / projectile Lubricant for extreme duty, hi-performance & long lasting requirements. Gun barrel operates cooler with longer service life cycles (historically  performance time doubles). Provides longer performance durations & maintenance cycles with reduced surface degradation. USDA Bio-base, Bio-degradable and Bio-safe for personnels physical application and use