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Our dog doors for sliding glass door combine quality, aesthetics, and functionality, making for a top-of-the-line pet door experience for you and your pet.
Different sizes with high aspect ratio to accommodate pets of any size.
Endura Flap Thermo Panel 3e
Endura Flap Thermo Panel 3e
Endura Flap Thermo Panel 3e
Endura Flap Thermo Panel 3e
Sliding door dog door - comes in Brushed aluminum, White, and Bronze color options.
Endura Flap Thermo Panel 3e
EnduraFlap glass door installations come in a variety of standard sizes that can fit a wide range of houses. Custom sizes are available to meet anyone's needs.
Sliding glass door doggie door - variety of track height adjustment range options available.
Endura Flap doggie door for sliging glass door is a portal between the outdoors and indoors for your pets.
thermo panel 3e in white stepover is adjustable
small endura flap cat door in bronze
tortoise shell cat using an endura flap cat door in sliding glass door
Our doors are built to last. Even under heavy weather and heavy use, you will still enjoy the insulation and energy-efficiency benefits for your house while your pet enjoys easy access to the outdoors!

Endura Flap Thermo Panel 3e

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The Thermo-Panel 3e is the best all-around patio panel dog door for sliding glass doors featuring the award-winning Endura Flap Pet Door

  • Insulated dog door for sliding glass door has dual pane and LoE glass, in sturdy aluminum framing
  • Safe and energy-efficient flap for pets
  • No tools are required for installation, perfect for renters or vacation homes
  • Adjustable heights and custom sizes to fit all sliding glass door models
  • Note:  For all custom heights you will be contacted for your exact sliding glass door track measurements

Size Chart

Flap Size Flap Dimension Step Over Range Overall Panel Width
Small 6" w x 11" h 3" - 5" 11 1/4"
Medium 8" w x 15" h 3" - 5" 13 1/4"
Large 10" w x 19" h 3" - 5" 15 1/4"
Extra Large 12" w x 23" h 3" - 7" 17 1/4"

Note: Endura Flap is not recommended for kittens or tiny dogs. Cats have been successful using all four sizes.

Popular Features

  • Superior insulation from the dual-paned glass and an energy-efficient flap that has magnets on all sides to shield against the cold or heat. The bellows on the side will expand and contract based on the weather to ensure that you have the best seal possible.
  • Easy installation due to the spring-loaded top. To install your Endura Flap place the bottom of your panel into the bottom track, push the spring-loaded top-down, align it to the top of your sliding glass door frame, slowly release the spring-loaded top to fit into your tracks and twist the thumbscrews to lock it into place.
  • The flap rotates on a rod rather than screwed into the frame to avoid extreme wear and tear, making it a longer lasting flap. Because the flap is made of PVC rather than Vinyl, the flap will not warp or yellow in direct heat.
  • Fits into most sliding glass door including aluminum and vinyl frames with a track width minimum of 1"‚
  • Secure locking cover can be placed over the pet door to ensure that intruders will not be able to come in through the dog door. Locks will also be provided to secure your sliding glass pet door to your frame.
  • Adjustable step over height allows you to tailor the Panel to your pet's personal size so that they may comfortably use the pet door. This is ideal for dogs with long legs (such as Great Danes) or short legs (such as a Corgi)
  • Option to add or decrease magnet strength to increase already significant wind resistance or trai100% made in the USA

Replacement Parts and Accessories


All Panels

  • 1x Foam Weather Strip
  • 1x Center Post Weather Seal Draft Stopper

1 Piece Pet Door

  • 1x Panel Pet Door
  • 1x Sliding Door Clamp

2 Piece Pet Door

  • 1x Top Glass Panel Section
  • 1x Bottom Flap Section
  • 4x Hex screws
  • 1x Hex wrench
  • 1x Sliding Door Clamp

Endura Flap Dog Doors 


The Thermo Panel 3e Patio Panel Pet Door


Installing a Patio Pacific Panel Pet Door 


Variable Magnetic Resistance 


Adjusting the Stepover Height 


The Leaf Blower Test 


Endura Flap Dog Doors Durability 

Endura Flap® Pet Door Warranty

To the original purchaser, Endura Flap® Pet Doors warrants this product and all of its component parts to be free of defects in materials or workmanship for a period of 15 years from the date of delivery to the customer.

Damage caused by accident, improper installation, abuse or normal wear, including damage by pets or glass breakage is specifically excluded from this warranty. Defective materials returned to Endura Flap® Pet Doors together with proof of purchase, will be repaired or replaced and returned to the customer free of charge.

Customer Reviews

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