Hoppe’s No. 9 Foaming Bore Cleaner is a foaming solvent formulated to dissolve and remove copper and powder residue from firearm bores. The foam is applied from chamber to muzzle and changes color—blue for copper removal or black for powder removal—so cleaning progress is visible. The formula is designed to reduce the need for mechanical brushing in many cases and is supplied in a compact 3 oz aerosol can. Follow the provided directions and allow the barrel to cool before application.
Key Specifications
- Product type is Foam Cleaner.
- The container size is 3 oz.
- Each unit contains 1 can.
- Designed suitable for Firearms.
- Helps protect against copper build up and fouling.
- Material composition listed as Multiple.
- Cleaning method is a one-step foam application requiring no harsh scrubbing.
- Color-change indicator shows blue for copper removal or black for powder removal.
- Typical use direction: spray foam from chamber to muzzle, wait 15–30 minutes, then remove foam with a cleaning rod and patch.
Compact and straightforward to use, this 3 oz foaming cleaner is suited for routine bore maintenance and quick range-side attention. Its visible color-change indicator helps confirm material removal, making it a practical addition to a maintenance kit or range bag for shooters who prefer efficient, low-effort bore care.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.




