Water Finding Paste

?. For testing for the presence of water at the bottom of fuel storage tanks. . Suitable only for use with Petrol, Diesel, Kerosene, Gas Oil, Heating Oil, Heavy Oil and Lubricating Oil. . Applied to a rod/length of string with bottom weight, the brown paste changes colour to brilliant red where it comes into contact with water, giving you a visual indication as to the depth of water present. . Gauges water content in all petroleums and hydrocarbons as well as sulfuric acid, nitric acid, hydrochloric acid, ammonia, soap solutions, salt and other chloride solutions. . 3 oz.