Apply the paste to the bottom of the dipstick and lower it to the bottom of the tank. Once the dipstick has been raised again, presence of water is instantly visible as the paste will have turned navy blue. See also the demonstration video on the right.
Water Finder Special
Rp 1
WATER FINDER SPECIAL changes colour from dark green to navy blue when it comes into contact with water present under fuel or mineral oils. Water can cause significant corrosion in storage tanks and other devices. It is therefore extremely important to regularly check for the presence of water.