







⚡ Transform your metals with speed and precision!
This 4-ounce steel blackening concentrate (Model BM4) mixes 9:1 with water to produce over 1 liter of bluing solution that blackens steel in 2 to 6 minutes. It also partially blackens stainless steel, copper, and aluminum, delivering a professional-grade finish ideal for metalworkers seeking fast, reliable results.
| Model Number | BM4 |
| Batteries Included | No |
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