LeakArmor UV Dye is an advanced class of highly concentrated ultra violet dye that uses DRY R instead of POE oil as its carrier. As soon as it enters the system, the green dye quickly exposes leaks with the use of a UV light. It is ideal in locations where leaks are not easily spotted with conventional methods. The highly soluble fluid exposes all leaks, making them easy to find. Contains one 0.3 oz single use hose.