Originally Posted by
Micky Duck
Moa hunter suggested this,so not my idea originally,I've used it with great success . silicon roof n gutter sealant thinned down with terps.... Mix it up in container well,if decide to use drill n bit of bebt wire as stirer,make sure drill on go slow or will waterproof bench too. When silicon has dissolved completely in terps paint liquid onto fabric and hang out on line to dry.... Works a treat,will no longer breath,but no longer leaks. Did canvas packs,my wife brimmed hat,that now sheds rain off to outer shoulders, cotton bumfreezer jacket now even after two washes still shower proof.