 DraftSeal
 - Manufactures weatherstripping and threshold products for commercial and residential applications.- Elton BV
- Makes draught excluders (weather strips).
- Lamatek, Inc
- Manufacturer of foam and sponge weatherstrips and gaskets.
- National Guard Products, Inc.
- Manufactures door seals and bottoms, thresholds, gasketing, and soundseals
- Pemko Manufacturing
- Door seal systems, assemblies and products, including thresholds, continuous geared hinges, and seals.
- PortaSeal
- Manufactures weather-stripping products for doors, windows and garage doors.
- Raven Products
- Manufactures door and window seals sealing products for a variety of applications including weather, fire, smoke, dust, draughts, and insects.
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