Reveal™ leak detection A-671 Plus additive is designed for R-134A PAG lubricated car A/C systems. The Reveal™ leak detection additives bring leaks to light with an ultraviolet lamp and special fluorescent tracing additives. Once the Reveal™ additive circulates through the system, leaks are easy to locate under a UV lamp. The Reveal™ leak detection tracer additives work easily and quickly in any system using water, oil, ATF, fuel or refrigerant. Reveal™ products reduce comebacks by locating all leaks at once, even multiple small leaks in the same system. Major auto and truck manufacturers such as Ford, GM, etc. have used Reveal™ products for over 20 years. Three easy steps - turn the system off and pour in the appropriate Reveal™ additive, run the system to circulate the additive and shine the UV lamp on the system and spot the fluorescent glow of any leaks - big or small. 1 oz. bottle - 4 applications. Detects R-134a in PAG Lubricated Based A/C Systems. UVP® #: 96-0149-01.