People don't appreciate the destructive power of water and sealant freezing," says Craig Erickson, founder and vice president of Equipt. "Thoroughly cleaning equipment at season's end should take top priority. My advice to contractors is to set a date for their last sealcoating job, and stick with it. Maybe it's when they have only 10 to 20 gallons of sealant left in their tank. They can run that out, and then winterize their equipment.