When I first acquired mine about 30 years ago, I did about 3 inside/outside soaks on a hot summer day and got maybe 4 inches of shrink on length, width, and height. It has never leaked winter or summer. I do tarp the roof during extended winter outings, not as a rain fly, but solely to assure a snow load slides off if camp is unattended during a serious dump. My exercised up near the top of this thread was mostly aimed at dong a thorough cleaning of the inside, and my thoughts were a soap and water scrubbing might reduce its repellent abilities.
The Isso compound I linked above was sourced as a suggestion from the Davis site.
Last edited by 1minute; 06/25/20.
