The Breakthrough Clean Copper Remover safely and effectively removes copper fouling and is 100% petroleum and ammonia-free. It’s virtually odorless and biodegradable formula easily removes copper fouling and minimizes future copper build-up without giving off any harmful or strong offensive odors found in other copper removers. Usable on all types of bore steel and won’t etch or harm the barrel.
Features: 
Quickly breaks down copper fouling & minimizes future copper build-up
100% ammonia free—User safe & eco-friendly
Safe on bore steel—Won’t etch or harm barrels
Virtually odorless is biodegradable & is petroleum-free
Made in the USA