the red angel will flush out completely if it doesn't seal. Easier if you have to do a major AC overhaul.

 

really old thread i know but. kust had to say this red angel stuff works great. my coolant was eeking out of my evaporator on about 24 hours. put a can of this tuff in, and one can of r134 behind it. and so far its blowing ice cold again. ill post back in a few days when i run the sniffer on it again. but so far so good!!