XTREME CUT 250C and XTREME CUT 290 are QualiChem’s premium semi-synthetic coolants. They provide unmatched corrosion control, foam control, extended sump life, cleaner machines, reduced consumption, and excellent cutting performance on aluminum, steel, titanium, and nickel alloys. While the approval for usage areas 1-4 are new, both 250C and 290 have a decade-long record of performance.