Endura Flap Cat Door for Horizontal Sliding Windows
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- Removable panel with built-in cat door fits into horizontal sliding window tracks
- Durable, aluminum frame and heavy-duty cat door made to withstand extreme weather
- Horizontal window cat door made with dual-pane, Low-E glass to improve energy efficiency
- Simple and easy installation in a matter of minutes
- Strong and durable locking cover included to keep your home secure
- Custom height options are non-returnable and please allow 4 - 5 weeks for delivery
- Brushed Aluminium finish out of stock until March 2022




Product Details
- Sliding window cat door insert built with a sturdy aluminum frame to complement aluminum sliding windows
- Dual-pane, Low-E glass allows natural light to enter while blocking out unwanted UV rays and infrared light
- Removable panel for aluminum horizontal sliding windows benefits all owners, especially renters
- Flap withstands -40 °F temperatures and stays sealed in 50 mph winds
- Comes with a C-clamp lock, draft stopper, and weather stripping for security and insulation
- Aluminum frame designed to fit into window tracks at least 1" thick
- Provided locking cover prevents pets from leaving the house when you want to keep them inside
- Made with durable, long-lasting materials for lifelong use
Size Chart


Flap Size | Flap Dimension | Step Over | Overall Panel Width | Recommended Pet Height |
---|---|---|---|---|
Small | 6" w x 11" h | 3" | 11 1/4" | 9-13" |
Parts
- 1 Horizontal Window Pet Door
- 1 Foam Weather Strip
- 1 Center Post Weather Seal Draft Stopper
- 1 Clamp Lock
Tools
- Scissors
Please read instructions & notes thoroughly before installation.
Step 1 Release Spring Mechanism

- Loosen the height adjustment locks at the top of the pet panel. This allows the spring mechanism to move freely up and down.
Step 2 Check Panel Fit

- To insert the panel into the top track, push up against the spring mechanism and swing the bottom of the panel up and over the threshold. Seat the panel on top of the small guide rail in the track.
Step 3 Apply Weather-stripping

- Once you’re sure the panel fits, remove it from the frame and lay it on its side on the ground.
- Apply the foam weather-stripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides, trim to fit with scissors.
Step 4 Install Center Post Weather Seal



- The center post weather seal strip (draft stopper) should be installed on the inside of the home. It can be installed on either the back edge of the sliding window panel (Figure A) or the leading edge of the stationary panel (Figure B).
- Place the panel back into the window, then tighten the height adjustment locks to lock it in place. Installation complete!
Videos
How to Measure Your Window for a Sliding Window Pet Door
How to Adjust the Magnet Strength on an Endura Flap
FAQ
Will this keep out drafts? This panel has dual pane insulated glass and the flap seals extremely well so it is great if you are looking for energy efficiency. |
How do I measure my window to make sure that the panel fits? You will need to open the window and measure:
|
How easy is it to install? This cat door panel is very easy to install due to its spring-loaded design. Simply loosen the screws, pop the door into the track, and retighten them. No tools required. |
Is this door just for cats? Small dogs can also use the flap, as long as they can comfortably make it through a 6"w by 11"h opening. Make sure to measure your pet before buying. |
What do I do if none of these pet door sizes fit my window? You can get a custom cat door if none of the pet door sizes fit your window. |
Warranty
Endura Flap products have a lifetime warranty against defects in materials and workmanship under standard regular use. Damage caused by not using the product as intended, improper installation, and chewing is not covered under this warranty.Customer Reviews



Flap Size | Flap Dimension | Step Over | Overall Panel Width | Recommended Pet Height |
---|---|---|---|---|
Small | 6" w x 11" h | 3" | 11 1/4" | 9-13" |
Installation Instructions
Parts
- 1 Horizontal Window Pet Door
- 1 Foam Weather Strip
- 1 Center Post Weather Seal Draft Stopper
- 1 Clamp Lock
Tools
- Scissors
Please read instructions & notes thoroughly before installation.
Step 1 Release Spring Mechanism

- Loosen the height adjustment locks at the top of the pet panel. This allows the spring mechanism to move freely up and down.
Step 2 Check Panel Fit

- To insert the panel into the top track, push up against the spring mechanism and swing the bottom of the panel up and over the threshold. Seat the panel on top of the small guide rail in the track.
Step 3 Apply Weather-stripping

- Once you’re sure the panel fits, remove it from the frame and lay it on its side on the ground.
- Apply the foam weather-stripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides, trim to fit with scissors.
Step 4 Install Center Post Weather Seal



- The center post weather seal strip (draft stopper) should be installed on the inside of the home. It can be installed on either the back edge of the sliding window panel (Figure A) or the leading edge of the stationary panel (Figure B).
- Place the panel back into the window, then tighten the height adjustment locks to lock it in place. Installation complete!
Videos
How to Measure Your Window for a Sliding Window Pet Door
How to Adjust the Magnet Strength on an Endura Flap
FAQ
Will this keep out drafts? This panel has dual pane insulated glass and the flap seals extremely well so it is great if you are looking for energy efficiency. |
How do I measure my window to make sure that the panel fits? You will need to open the window and measure:
|
How easy is it to install? This cat door panel is very easy to install due to its spring-loaded design. Simply loosen the screws, pop the door into the track, and retighten them. No tools required. |
Is this door just for cats? Small dogs can also use the flap, as long as they can comfortably make it through a 6"w by 11"h opening. Make sure to measure your pet before buying. |
What do I do if none of these pet door sizes fit my window? You can get a custom cat door if none of the pet door sizes fit your window. |