Has anyone used any of the leak fix in a bottle for a/c systems. I see they have them for automotive a/c as well as residential/commercial systems. Looks like a glue you put in the system when adding refrigerant. I cant imagine they work or last. I dont see how it wouldnt plug up a cap tube or piston, or gum up a txv. Just curious to see if anyone used any of these leak repairs to see what the results were. I intend to keep brazing any leak I can or replace the component that is leaking.