BORE CLEANING FOAM cleaning foam to removes carbon, copper, lead, zinc, perfectly cleans the inside of the barrel in 10 minutes. Highly effective formula quickly and safely cleans the barrel. The product does not contain ammonia and does not emit toxic fumes, does not ignite. Safe to use indoors especially when toxic fumes are an issue. Meets all industry standards for small arms maintenance. It is harmless on metal, wood, paint, varnish, ceramics, rubber, plastic.