Rectorseal Better Bubble Leak Locator is a reliable solution designed to detect leaks of refrigerant gases, air, oxygen, and most other gases. Its thick blue formula works effectively across a wide range of temperatures and pressures, making it suitable for use with all types of pipe, tubing, valves, tanks, A/C and refrigeration coils, and similar applications. This product is gentle on surfaces, as it will not corrode metal or damage plastic or rubber components. Application and cleanup are straightforward and safe, ensuring convenience for users. Available in two sizes, an 8 oz dauber bottle and a 32 oz trigger spray bottle, both operate efficiently within the temperature range of 20 to 250 degrees Fahrenheit. Model Number: 65554