Wet Chemical – Class K Wet Chemical extinguishers contain a blend of Potassium Acetate and Potassium Citrate that is extremely effective in suppressing high temperature fires involving cooking oils and grease. The units incorporate a spray nozzle that ensures the agent is applied gently to the burning oil thus preventing splashing. It’s unique cooling properties deliver exceptional heat absorption ensuring the fire remains out. Wet Chemical is suitable for use on Class A and K fires. TypicalUses: For protecting cooking oil and grease fires in commercial kitchens. This extinguisher is designed to complement existing pre-engineered hood systems.