Kolor Kut Modified Water Finding Paste has been designed for use in Methanol, Ethanol enriched fuels in all proportions when they are water-free but relatively small amounts of water can cause separation of alcohol from the fuel. The mixture settling to the bottom of the storage tank is predominately alcohol by most water detection pastes. Kolor Kut Modified changes from dark brown to bright red on contact with water. Phase separated alcohol solutions with as little as 6% water will turn the paste yellow. 2.5 ounce tube. 12 tubes per box./144 per case