XXL Premium Door BottomSealer™


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New! Extra Large BottomSealer™ for Bigger Gaps! Custom Sizing Available!

Got a bigger door or a bigger gap under your door that needs a bigger seal? No problem! Our original StopTheSnirt™ BottomSealer™ now comes in a new, larger size to seal gaps from 2.75 to 4 inches!

Seal big gaps on large doors like BiFold Doors or Hydroswing Doors tight with our XXL BottomSealer™ , and stop snirt from getting in your farm shop, warehouse or airplane hangar!

Our XL BottomSealer™ will seal gaps up to 3 inches, but if your door has an especially large gap due to an excessively unlevel or uneven floor, or a badly bent or ill-fitting door, you may need our new XXL BottomSealer™ featuring an even larger 3 inch diameter insulating thermal tube engineered to seal gaps up to 4 inches wide!


Got a big gap but not sure what size BottomSealer you need for your door?
No problem! Now you can try before you buy! Free!*

Order XXL BottomSealer samples here!

*Restrictions apply. See sample product page for complete details.

Big gaps? Big Snirt? You need Big SnirtStopper!

No matter how big the door or how large the gap, our XXL Premium BottomSealer™ can Stop The Snirt! Stop Snirt like snow, dirt, leaves, debris, insects, spiders, snakes, frogs, mice, rats and more from getting into your building through unsightly gaps below the doors. This new, even larger seal weatherstripping astragal is made using the same Heavy-duty, Kevlar reinforced woven polyester technology as our original size. It stays pliable in cold weather and retains its resilience for years and years, so it molds to the shape of the floor regardless how many times the door is opened and closed. It will not tear and never wears out, and we offer a limited Lifetime Warranty to prove it!

And just like the original, this larger BottomSealer™ is filled with a high-density foam core that insulates against temperature changes, keeping your shop, warehouse or hangar cooler in the summer and warmer in the winter. It solves the age-old problem of door freeze-down caused by escaping heat that melts outside snow against the bottom of the door which then allows the resulting water to seep under the door and refreeze. Save money on heating and cooling bills and keep workers more comfortable and happier with a cleaner, warmer and safer workspace!

Sealing the bottom of a garage door: Before and After

How to Install StopTheSnirt™ BottomSealer™

Works on All Types of Commercial Bay Doors!

StopTheSnirt is not just for residential garage doors. It works on all types of commercial doors, too, including:

  • Overhead Doors
  • Sliding Doors
  • BiFold  Doors
  • HydroSwing Hydraulic Doors

Perfect for All Types of Large Buildings!

StopTheSnirt is not just for residential garages. It is perfectly suited for all types of large commercial buildings, too, including:

  • Farm Shops
  • Warehouses
  • Shipping and Receiving Docks
  • Aircraft Hangars

Sloppy, loose fitting bay doors can be a huge source of heating and cooling loss and present a security risk. Seal them up tight with a SnirtStopper™ and keep your shipping and receiving employees happier with a cleaner, warmer and more secure shipping area.

Even Works on Walk-In Doors

SnirtStopper™ isn’t just for large garage doors. If you’ve got a walk-in door with an gap larger than 3 inches, this is the seal you need! Our XXL BottomSealer™ can be bought by the foot so you can get just the size you need for any standard width walk-in door.

Installation is Easy!

Regardless the application, our BottomSealer™ couldn’t be easier to install. Every order comes with color-matched self-tapping screws. All you need is scissors to cut the seal to length and a drill to drive the screws! You don’t even need to remove the old seals. It’s that simple!

Seal your garage door, commercial shipping doors, docking bay overhead doors, airplane hangar doors or even worn out walk-through doors in minutes with a StopTheSnirt XXL BottomSealer™ today and Stop The Snirt!


  • Custom sizing available!
  • Saves energy!
  • New, Larger size seals gaps up to 4 inches!
  • Molds to uneven doors and floors
  • No need to remove any of the old door seal, astragal or hardware
  • Available in black for a simple, clean look on any door
  • Installs easily with included self-tapping screws
  • Average installation time under 30 minutes
  • Fits perfectly the first time
  • Fills very large gaps under any door!
  • Helps prevent garage door from freezing to the ground
  • Keeps out the elements like snow, rain, dust, dirt and more
  • Keeps out all critters like varmints, bugs, spiders, rats, mice, frogs, insects and even snakes
  • Wiper seal rides under door constantly adjusting to the floor
  • High density foam core insulates the bottom of the door
  • Made of heavy-duty, Kevlar reinforced woven polyester so it stays pliable and resilient for years and never wears out!
  • Made in the USA!
  • We ship anywhere**

* We offer a military discount for active military personnel. Call for details.

** We ship worldwide. Please call for shipping rates outside the continental US.


Per Foot, 14 ft., 15 ft., 16 ft., 17 ft., 18 ft., 19 ft., 20 ft., 21 ft., 22 ft., 23 ft., 24 ft., 25 ft., 26 ft., 27 ft., 28 ft., 29 ft., 30 ft., 31 ft., 32 ft., 33 ft., 34 ft., 35 ft., 36 ft., 37 ft., 38 ft., 39 ft., 40 ft., 42 ft., 44 ft.