Reformulated for better consistency and improved color change | Quickly and accurately detects water in fuel storage tanks | Mustard yellow paste will turn red upon contact with water | Driver-friendly flip cap | User-friendly plastic tube, less mess than metal tubes | Reformulated for better consistency and improved color change | Quickly and accurately detects water in fuel storage tanks | Effective with gasoline, diesel or other hydrocarbon products, sulphuric, nitric and hydrochloric acids, ammonia, soap solutions and other chloride solutions | Mustard yellow paste will turn red upon contact with water | Gauging paste