You can also take them into a dark room and move a flashlight around inside them to look for holes. Move slow as the holes are sometimes not very obvious. You might even need to stretch the fabric a little bit as the holes are bigger while you wear them, then close up when you take them off. Also the stitched seams are probably the worse places for leaks. If it has footings, then the bottom of the feet are next, since rocks get in the boots and rub holes. I then took a marker/chalk to mark the holes. As far as patching them, I used the Aquaseal neoprene kit.
Aquaseal is the best to use. Tongue depressor is a must if you want to do it right. A shop vac and a spray bottle with dish soap and water will make life much easier. Hang up the waders somewhere (deck, tree, clothesline) and spray around the offending area. Hook up exhaust side of vac and insert hose into the top of the waders sealing it as best you can with both your hands. Look for bubbles the size of ping pong balls and mark with tape.
Next take a chill pill because you will need to wait two days for waders to dry, apply Aquaseal, and wait at least 24hrs. 48hrs would be better. Test in the tub after because if there is more than one hole the aquaseal has been known to harden in the tube a few days after using for the first time.
Hello fellas. I don't post very often but I read everyday. I enjoy reading your post. Anyway, Chtbnks is on the money with aquaseal. Great stuff. In fact, I bought some tonight to repair my waders. The real reason for my post is to share how to store it. Put it in the freezer. I have been doing this for years. Take it out several hours or the day before needing it. Use what you need and put back in the freezer. I forget where I learned this (might be on package), but it works.
Thanks for the suggestion. I ordered some aquaseal and one of the comments did say that it will harden after you use it the first time. I am going to sure up the seams in the leg area of my waders and see if that fixes it.