From waterproofing your own matches and tinder, to waterproofing bottles and containers, a quick dip in melted paraffin can give a variety of items an H20 repellent coat. For matches, heat some paraffin until it is just melted. Quickly plunge the match head into the wax, pull it out and blow on it to cool the wax so that it hardens. If the wax doesn't cool fast, it will soak into the match head and ruin it. Test some matches when you are done, to make sure they are working. To strike the matches for testing or for necessity, scrape off the wax coat before trying to strike it. If you don't, you'll gum up the match box striker strip with wax thereby ruining it.