Gasoila 2 ounce tube All Purpose Water Finding Paste is ideal for E-10 Applications. Fast, reliable way to detect water in fuel storage tanks. Accurately detects phase separation in ethanol blend applications. For all petroleum fuels including ethanol and methanol blends, diesel, kerosene, number 2 oil, JP-4, JP-5 and more. Works in seconds, even in extreme temperature conditions. Paste will turn yellow-green in the presence of water.