I need a boot sealant that does the job in wet snow, slush, and shallow snow melt. Spray on sealants are a fine finishing touch over a layer of Shoe Goo sealant that keeps the water out. Shoe Goo is a sealant that needs to be applied first, and kept warm for best application at about 70 degrees. So, it's a good idea to apply it in town, perhaps over a low heat from the range or oven, before heading out to the slopes and cross country adventures up the hill.