My A/C was leaking R134A thru the evaporator. After charging, it would blow cold for about 4-5 days, then slowly get warmer. I was about to spend around $600-700 to get it fixed when I read this thread: https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=19926
Installed the Super Seal on Aug. 20th and it is still blowing just as cold as the day I put it in, about 48 degrees with the temp probe stuck in the vent, with the outside temp at 85 degrees. It did everything it promised to do. This product is guarenteed to work if your system will hold at least a partial charge for two weeks. Previously, mine would hold a partial charge for 10 days. I highly recommend spending the $20 and trying this before spending big $$ on fixing a leaking A/C system.
Installed the Super Seal on Aug. 20th and it is still blowing just as cold as the day I put it in, about 48 degrees with the temp probe stuck in the vent, with the outside temp at 85 degrees. It did everything it promised to do. This product is guarenteed to work if your system will hold at least a partial charge for two weeks. Previously, mine would hold a partial charge for 10 days. I highly recommend spending the $20 and trying this before spending big $$ on fixing a leaking A/C system.