Review on FJC Universal A/C Dye (1 oz.) by National Parts and Abrasives by Oscar Thompson

AC Essential. This stuff does its job, give it time to run on the system and use your light to find leaks. I use my sensors to insert it into the system, there are many ways to do it, I just prefer this method. Remember it's a dye, get it anywhere and it will light up anywhere when you use your black light, you don't want it on the AC lines because it will just make it harder to find leaks. I clean it off the line with brake cleaner and wash my hands with Simple Green if I get caught.