Read the cliplight description, reviews, it will not ruin anything. it runs free until it finds a leak then it seals it. (freon must hold in system for more than a couple of days, can not seal big leaks). This is not some cheap stuff sold at auto stores, only available to certified HVAC techs. Not cheap, superseal auto is about $45 a can.

__________________
1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

609 Certification