Building Envelope Products

Loading Dock Door Seals

Loading Dock Door Seals

Sectional Door Seals, Rolling Steel Door Seals, Roll Up Door Seals, Self-Storage Seals, Barn Door Seals, Hangar Door Seals

ProSeal brush weather-stripping products provide are cost-effective solutions to seal gaps and minimize air infiltration around overhead doors-sectional, rolling steel and other large commercial service doors. Just a ¼-inch gap around the unsealed sides and top of a 10’x10’ sectional door is the equivalent of a 90 square inch hole in the door and permits 328 million cubic feet of air infiltration per year. SEALEZE® brush weatherseal products effectively reduce air infiltration by as mush as 98.5%, while reducing light and odors that attract unwanted insects, rodent and other pests.

What type of overhead door do you need sealed?
Click here to download Industrial and Large Door worksheets

Therm-L-Brush: For Sectional, Rolling-Steel and Service Doors

100% Straight Nylon Filament. Available in sizes D (for sealing gaps up to 3 inches wide) and G (for sealing gaps up to 7 inches wide). Therm-L-Brush with filament 4” long or less is UL labeled for use on 3-hour fire doors.

ProSeal Brush: For Large Commercial and Aircraft Hangar Doors and Mini-Storage Unit Doors

100% Polypropylene Filament. Available in sizes C (with straight filament) for sealing gaps up to 3 inches wide and size D (with crimped filament) for sealing gaps up to 4 inches wide. ProSeal brush is ideal for sealing gaps in large doors, such as industrial doors, barn doors, and aircraft hangar doors.


We offer a variety of products to enhance your sealing choices and make installation easier. Accessories include:

  • Plastic Guide Seal for Rolling Steel Doors

  • One-piece, reverse angle clip-on vinyl flap for commercial sectional doors

  • Vinyl flap that fits any SEALEZE® size C holder

For questions about integrating a brush solution into your application, contact a SEALEZE® representative at 1 800 787 7325 or email
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