i use a leather cows knee. i got a good seal but sno seal or wax or crisco or something could only help. but you still gotta worry about the flint and frizzen. one drop and your out of commission. i use a cows knee and some caution..try to keep it tucked under my arm out whatever else i can do. i also reprime pretty frequently gotta make sure you can reprime and not get it wet though..which can be tricky. i can honestly say in my 5 or so years of hunting with the flinter in rain and snow ive never had a misfire. days like that i go to the farm at the end of the day and fire the rifle just to see IF it would have went off. so far so good and for some reason we always get alot of rain during our flintlock season...wierd how that works out...