Kool-Stop’s Salmon compound is designed to standup to extreme conditions like wet, mud, and snow. Pair (enough for 1 wheel) Fits Shimano and Shimano-type carriers (i.e. Avid, Tektro, etc.)
You shouldn’t store your bike outdoors, but if you must, use Kool Stop’s Bike Pajamas. Also works great for keeping the dew and moisture at 24 hour races.