Draft blockers can protect your loading docks and keep warm or cool air from escaping. Dock seals have nylon-reinforced vinyl facing, mounted, and bonded on wolmanized wood. They help prevent the passage of dust, insects, exhaust fumes, and other airborne particulates. Dock shelters can seal off your warehouse and interior loading dock from outside elements, keeping heating and cooling air inside while allowing full access to truck door height and width. For even greater protection, choose a dock seal with a shelter that fastens directly to a building wall. A retractable dock shelter can create a seal between the loading dock and truck trailer. It features an independent, spring-loaded scissors mechanism to allow the shelter to retract with the trailer keeping the shelter square. Have an existing dock seal or dock shelter in need of repair? Grainger has a patch kit with nylon-reinforced vinyl material that’s ideal for repairing most draft blockers.