Have had a very small pin hole in right foot of my waders that would leak, very slowly over a couple hrs, just enough to wet my toes, in cold, cold feet aint no fun...lol I tried repairing all the seems in the foot part with still no luck, tonight, I filled the tub, got the air pump out that blows up my camping matress, used it to pump air into the boot area under water and found that little cuss, the air pressure worked in finding it so now I should be able to repair it.. You guys most likey have used this method b-4 but, if not, there ya go...