I can't remember the product but surfed it up going through Colorado's Davis company. Tent was in fine shape with no issues, but with 25+ seasons of cooking therein the inside was pretty dingy compared to the outside. Cost about $100 and mixed it into 10 gal of water which was enough for two applications. On a breezy and hot summer day, I first did a thorough inside and out Dawn dish soap and water wash, a heavy rinse inside and out, and let it dry. First application was with a weed sprayer and broom sweeping it about both inside and out. Let that dry and did a second spray on which pretty much just ran off.
Edited: Did a little surfing. and this was the product
Water proofing link
