This liquid gas leak locator is a high-viscosity formula, which allows it to be used in high-temperature applications. It is also nonfreezing, which makes it effective for low-temperature applications. Apply it to fittings and joints, and a stream of bubbles will form in a few seconds if a leak is present. A fluorescent dye in the formula provides high visibility, and a dauber on the cap allows easy application. Leak Detector, Liquid, Size 8 oz., Temp. Range (F) -, Characteristics Dye Enhances Leak Detection; Nonfreezing, High Viscosity