HoneRite Gold BORA STN-HRG250 250ml Honing Solution. The Grinding/Sharpening Additive That is Specifically Formulated to Make Water Non-Corrosive and help protect against Rust Just add HoneRite Gold to water to make it non-corrosive. Suitable for all water stones, Japanese water stones, ceramic stones, lapping and diamond film sharpening systems. Works with water cooled sharpening systems such as Tormek. This powerful honing/sharpening/lapping fluid contains ferrous and non-ferrous metal corrosion inhibitors, further protecting your tools and machines against rust and corrosion. Highly concentrated  One Bottle makes over 6 Liters of rust inhibiting fluid Add 40ml of HoneRite Gold to 960 ml of tap water to make 1 liter of honing solution / grinding solution.