EDM-500 Operators everywhere give EDM-500 a big THUMBS UP! “I can see the difference in my hands since I started using Rustlick EDM-500... I have very dry skin and since switching to EDM-500 my hands have never felt better.” - Rich Plourde, ITW Highland EDM-500 is a premium synthetic dielectric fluid for Electric Discharge Machining. The transparent, fluorescent green formula is made with only cosmetic-grade ingredients so there is virtually no skin irritation or odors. EDM-500 lasts over twice as long as mineral-oil based dielectric fluids and offers significant savings when compared to other synthetic dielectric fluids. See How Rustlick EDM-500 Compares to the Competition: Hirschmann's Ionoplus 3000 Commonwealth EDM Super Supreme Specific Gravity Acid Value (mg KOH/g) Flash Point MATERIALS COMPATIBILITY