Dragon Pet Door for Vinyl Sliding Glass Doors

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  • Cost-effective, removable panel with built-in pet door
  • Designed specifically for vinyl-framed sliding glass doors
  • Quick, tool-free installation, easily removable
  • Tough, two-piece flap for weather resistance
  • Allows your pet to come and go as they please 

The Dragon vinyl patio pet door insert is designed specifically for vinyl sliding glass doors. This panel fits more comfortably in your vinyl sliding door track than metal-framed panels for a seamless, weather-tight fit. Featuring a spring-loaded design, this panel installs quickly and easily, no tools needed. The Dragon Pet Door for Vinyl Sliders accommodates your unique insulation needs while allowing your pets the independence to come and go as they please.


  • Vinyl frame for a secure and insulating fit in vinyl sliding glass doors
  • Single-pane, tempered glass optimal for temperate climates
  • Translucent, polyolefin elastomer flap is easy for pets to use
  • UV-resistant additives in the pet door flap and frame protect against warping and cracking
  • Accommodates a single flap or double flap to fit your insulation needs
  • Comes with foam weatherstripping to keep your home insulated
  • Fits comfortably into existing tracks at least 1 1/2” thick
  • Available in three track height adjustment ranges to fit a wide range of vinyl sliding doors 74.75"–80.25" in height 
  • Spring-loaded design for simple, tool-free installation
  • Includes a C-Clamp lock to hold the panel in place (you can install a Charley Bar for additional security)
  • Sturdy locking cover included to block access when needed


  • Perfectly tailored to fit your vinyl sliding door track seamlessly without any gaps
  • Pets can come and go on their own terms comfortably through the flexible, translucent flap
  • Easy installation and removal, great for renters or seasonal installation

Size Chart

Flap Size Flap Dimensions Step Over Overall Panel Width Recommended Pet Height* Stock No
Small Coming soon! Coming soon! Coming soon! Coming soon! 01DF-A10SS
Medium 7.0" x 13.1" 4.4" 14.6" 12" - 16" 01DF-A20MM
Large 9.4" x 16.6" 4.4" Coming soon! 12" - 19" 01DF-A30LL
Extra Large Coming soon! Coming soon! Coming soon! Coming soon! 01DF-A40XL

*measured from the ground to the tallest point of their back.

Dimension Definitions:
Flap Dimension Definition Panel Dimension Definition

Don't know which size to get? Here is a measurement guide to help you out.

Wondering how to measure your track? Review our Track Measuring Guide.

Your Track Height Adjustment range is based on the measurement of your door height from the lowest point of your track to the highest point. Each Dragon patio panel has a 3" adjustment range with your window track height approximately in the middle. The following adjustment ranges are available:

  • Short: 74 3⁄4" – 77 3⁄4"
  • Regular: 77 1⁄4" – 80 1⁄4"

CAUTION: If your measured track height is near the bottom of the adjustment range then you should review A Note of Caution.


What's the difference between the single flap and the double flap?

The double flap option provides increased insulation against the cold. Both options have magnets on the flap to keep the door sealed in wind.

I want to get the large pet door for my dog, but I am concerned about a person fitting through it.

All Dragon Pet Doors come with a locking cover. This cover can be used to keep you doggy in. It also can be used to keep intruders from entering your home. It slides into the interior frame.

How do I know what size is best for my dog?

When installing the pet door you want it to clear the top of your dog's back by 1-2 inches, minimum. To give your pet the most comfortable pet door possible, make sure the step-over is less than 1/3 of your dog's height. Lastly you want the width of the door to be big enough to allow your pet to go through without touching the sides. Here's a measure your pet with tips on how to determine the correct size.

Are replacement flaps available?

Yes, you can buy Dragon replacement flaps.

Where can I install the Dragon Pet Door?

The Dragon Pet Door has multiple Installation options. You can install it in Regular Doors, as a Wall mount, Aluminum Sliding Doors, Vinyl Sliding Doors, Sash Windows, Vinyl Windows, and Horizontal Windows.

Can my small and large dog share this pet door?

Yes, but make sure to follow standard Measuring Guidelines. Make sure the size of the door is based off your tallest pet, but installed low enough for your smallest pet.

Installation Instructions


1 Panel Pet Door with a pre-installed Dragon Pet Door (single or double flap) 

1 Foam Weather Strip 

1 C-Clamp Lock 

1 Locking Cover 


Step 1: Loosen the thumb screws at the top of the panel. This will allow the spring-loaded mechanism to move freely up and down. 

Do not apply weatherstripping until you have test-fit the patio panel in your sliding door track to make sure it fits. 

Step 2: To raise the panel into the upper track of your sliding glass door, push up against the spring mechanism at the top of the panel until it is flush with the upper track.  

Swing the bottom of the panel up and over the threshold, allowing it to rest on the small guide rail in your sliding door track. If you can’t quite get it in the track, try swinging from the outside as the outside track wall may be shorter.  

Step 3: Once you’re sure the panel fits, remove it from the sliding door frame and lay it flat on its side on the ground. Apply the foam weatherstripping by peeling off the paper to expose the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides, trim to fit with scissors as needed. 

Once you have applied the weatherstripping, you can repeat steps 1-2 to install the Dragon Panel Insert in your sliding glass door. 

Step 4: Install the provided C-Clamp Lock. Place the lock on the flange (raised track) of the sliding door track and tighten the screws to secure it in place. 

Note: For maximum security, you can install a Charley Bar to secure the patio panel in your sliding glass door track.