Description CuBUSTER is chemically formulated to act on heavy layers of copper and to treat heavy copper fouling in rifles and sidearms. This product is especially for guns that are not regularly cleaned and require intensive cleaning care. A blue indicator on your cleaning patch will confirm an effective copper removal from the barrel. You will go bananas for CuBUSTER’s extremely effective copper removal together with its light tropical scent. CuBUSTER is the ultimate copper stalker to restore your heavily fouled firearm to its former glory. “BRING FORTH THE MARKSMAN in you” Direction: SECURE AND UNLOAD THE FIREARM Wet 3 patches with CuBUSTER and push through the barrel. Run patches slowly through the barrel to give solvent time to react with the bore surface. Run 15 passes through using a nylon brush soaked in CuBUSTER. Do not use a brass brush. Wet another 3 patches with CuBUSTER, run through, then leave the product in the barrel for 3 minutes. Do not leave the product in the firearm overnight. Continuously run dry patches through until the patches gather no residue at the barrel tip. Before storing your firearm dampen a patch with GT150 GUN OIL, run it  through the bore as this will prevent rust and dust from settling on your firearm. Always run a clean, dry patch through the firearm before use to prevent any obstructions.   Specifications: CuBUSTER removes more copper per patch than any other cleaner without any ammonia or harsh smelling chemicals. Blue copper indicator built in. Will react immediately with copper, brass and nickel. Please use for intended purpose. Not for human or animal consumption. Always test the product on barrels and coatings before application. Keep out of reach of children. Store in a cool, dry place away from direct sunlight Acetone Free Ammonia Free Biodegradable