I can't find any information on any stop leak for hvac that discusses any compatability issues. I am here because a home warranty company said they had good luck with it.
Trane says it voids their warranties, Auto techs say it messes up their recovery equipment.
Ever talk to someone who lost money in Vegas? They only remember the time when they were winning and you have to pry out the story how they lost it all back in spades. It's going to take more than "good luck" stories to convince me to use the stuff. I'm not using it until I see documentation.