After over twenty years, I'm convinced
waders are meant to have a much shorter life, regardless. I've had cheap ones and fairly expensive ones. Leaking is the end result of all waders.
I've used shoe goo, which is perhaps too thick. I extended the life of my present waders by spraying the seams with silicone spray. Preventive care!
Now I'm getting a little "dry rot" with some small cracks on a fold seam. I guess hanging waders, when not in use, lengthens longevity. Maybe the next time. I now have some room to hang them.