Thanks Joe. I still hope it will be much cheaper to recharge with "freeze 12" than R12. I did not know that propane was in there. Guess it makes sense. Propane is an excellent refrigerant. As for the danger factor, I think that may be a bit exaggerated. Freon leaks are very slow, and if you have a faster leak when the car sits, propane is heavier than air, so it will "slip" under the car and go away. If the car is in a garage, that may be more of an issue. I guess there is always a chance, but my guess its a minimal, otherwise the stuff would be illegal. D^2 At 02:35 AM 7/6/2002 -0400, you wrote: >There was a TV program lately that showed when freeze 12 had a leak, a >spark under the hood blew the front end completely off the car. It was the >worst situation for the example, but still it is very explosive. It uses >propane and R-12. You must go to an air conditioning shop to have it >installed. I only know of R-22 as being available to buy yourself. It is >for a home type air. It was used on a 54 Imperial I did years ago. Joe >Machado