Hangsterfer’s R-100 is a full synthetic machining and grinding coolant. The transparent biostable formula offers extended sump life, reduced coolant consumption and minimal waste. R-100 is free of oil and grease while remaining transparent in both hard and soft water. It provides a unique cleaning action to help reduce wheel loading and leaves behind a thin corrosion inhibiting film. It does not contain nitrite, nitrate, DEA or MEA.