I have mentioned this brilliant idea before but apparently I had not done a post about it. Jim Woods has this great treatment which dramatically increases the waterproofness of silnylon (or other) tent floors or groundsheets. It simply involves mixing some (tube) silicon with odourless turpentine (ratio approx 1:3), painting it on and waiting for it to dry. I have done this myself and it works well. Simple, but highly effective. More details here: A Treatment for Silnylon Floors: http://jwbasecamp.com/Articles/Silnylon1/index.html as mentioned here: http://www.theultralighthiker.com/trapped-by-flood-waters/
