I went by the instructions to first clean with an appropriate cleaner my REI Goretex rain parka. After removing from the washing machine, I then applied this product per instructions. I used the dryer method to dry it. First time out in rain water did not bead up. Hasn't since. What a waste of money. I give this a negative five stars for misadvertising.It may be that it does not work on this particular REI brand...who knows?Someone once told me that what seals Goretex and allows rain to bead up is to just iron the fabric with a warm iron. Forget the chemicals. I will try that.