KOLOR KUT WATER FINDING PASTE GTP-3908 Water Finding Paste Kolor Kut – 3 oz/85 gr tube. It changes from golden brown to brilliant red upon contact with water. It gauges water content in all petroleum and hydrocarbons as well as sulfuric acid, nitric acid, hydrochloric acid, ammonia, soap solutions, salt and other chloride solutions. Place a thin film of paste on a clean gauge line or rod approximately where water level is expected to appear. Lower tape into tank until bottom is reached. Level will appear by positive contrast of colors. Instantaneous in gasoline, diesel, kerosene and gas oils. Heavy oils require a few seconds.