I added to water in grinder and assume it did the job. I had no problemsit came on time and worked as expected.I have used this coolant for years, I absolutely love it. I swear it is responsible for the long life of my grinder. I was just about out of the stuff, and had a project I wanted to start--how great is it, that I didn't have to drive to the nearest glass supply store (about an hours drive for me)..and I received it in 2 days! I wouldn't run my grinder without it.Have successfully used this product before.As expectedThis is the coolient I use in my grinders for my stained glass work. Great coolient wouldn't use anything else. The bear is I got it the next day. What more can you askA grinder necessityThis product was recommended for use on glass grinders and saws. I believe it will lengthen the.life of the blades. Time will tell.Product seems to work well so far. The bottle is not sealed so expect some spillage when shipped. They put bottle in a plastic bag which was also not sealed properly either. Only a little spilled into the outer plastic packing bag, but quite messy.Exactly what I was expecting but I have used this product in the past so I knew it would be goodIt was exactly what I wanted at a good price. Wrapped in mail pouch and an inner plastic which was spill proof.Seems to work alright like it.