When I hike in the winter, I frequently apply a sealant to my boots to make sure that rain, snow, and water stay away from my feet.
All good snow boots and mountaineering boots will have a Gore-Tex or other waterproof lining, but that doesn’t prevent water from penetrating the outer layer of your boot.
Why not just force water to bead up on the outside of the boot, rather than saturating the leather before being stopped by the Gore-Tex liner?
I use a product call Tectron Sno Seal, a beeswax waterproofing sealant that you can use on boots and shoes.
How to waterproof your boots:
Waterproofing is a quick and easy process. I do this several times a season, especially in advance of a snowshoe outing or a winter hike/backpacking trip.