Bore Tech's Cu+2 Copper Remover is the copper remover that surpasses the rigorous demands of today's top shooters and cleans copper fouling faster than traditional petro-ammonia based solvents. The key to the Cu+2 Copper Removers copper removing capabilities is a unique two step process. In the first step, the Cu+2 Copper Remover rapidly oxidizes and breaks down copper fouling by re-configuring its electronic state. Once the copper fouling is oxidized in step one, a specially enhanced binding agent within the Cu+2 Copper Removers formulation acts like a magnet capturing the copper and rendering it unable to redeposit in the firearms bore. This technology allows for the complete extraction of copper fouling at full strength without becoming saturated and losing effectiveness. Bore Tech Cu+2 Copper Remover is 100% ammonia free and barrel safe. It will not etch or harm barrel steels and can be safely left to soak in the bore for an infinite period of time. In addition, the Cu+2 Copper Remover also contains a short term rust preventative, which shields and conditions the firearms bore after cleaning. Just dampen your last patch with Cu+2 Copper Remover and your bore will be protected against rust and corrosion for up to 2 weeks.