Hi, Buck B.!!
I've "tried 'em all", I think, over the many years on the water and tearing up all kinds of waders in the process.
There are two repair kits for waders, after all the ones I've tried, that I won't leave home without them both...........
One, is simply called; "The Orvis Wader Repair Kit". I've easily fixed my 3 and 5 m.m neos with this kit, as well as a pair of my breathables. I've fixed small holes with this kit, while eating a snack, streamside, then went right back, into the water, leak fixed, after about 20 minutes.
The 2nd, and the one I like the most, really, is Loon Products, "UV Light Wader Repair kit. I like IT the "best", because it's the fastest repair maker I've ever seen and you can repair not only any type of wader with it, but the adhesive, when applied to knots, then hit for a second, with the included UV light, makes a permanent, smooth, and flexible knot connection.
You can also use this adhesive, for making very fast nicely molded, soft heads on streamers of any size!! Merely mold the head, with your fingers, hit it when you're happy with your handi work with the UV light and the head is done, in like 30 seconds!
But, as a wader repair, raingear repair, you can pretty well name it, repair............ the Loon UV Light Kit is the best I've found!
Now, as a "how to" on repairing waders, I've found the article about wader repairs, on www.peninsulaflyfishers.org to be a great instructional page, on wader repairs. On their home page, click on "tackle" then on "wader repairs"! Good luck! :-D