Corsair Hydro X Series XL5 Performance Coolant brings your custom cooling system’s color scheme to life, available in a wide choice of vibrant translucent colors. Premixed and ready to use right out of the bottle, XL5 Performance Coolant includes anti-corrosion and anti-bacterial inhibitors that keep your custom cooling system running clean and cool. Formulated to protect copper, brass, and nickel fittings and blocks, XL5 Performance Coolant brings vivid color and cool temperatures to your custom cooling system.