Endura Flap Quick Panel 3

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  • This semi-permanent panel features a built-in pet door for sliding glass doors
  • Made to endure harsh climates
  • Made with a single pane, tempered glass
  • No tools required for installation
  • Adjustable height to accommodate varying sliding glass doors with a track at least 1" thick
  • Need a different size? Check out this product's custom options

The Endura Flap Quick Panel 3 is a dog door for sliding glass doors with a high insulation value. Featuring a spring-loaded design, you won't have to use a single tool to install this. It fits right into the track of your sliding glass door, which means there won't be any permanent alterations or modifications during your door installation. Engineered with 3/16”  single pane, tempered glass, and a polyolefin-based polymer flap with magnets lining the perimeter, this panel pet door is extremely energy efficient. Below freezing weather? No problem, the Quick Panel 3 has you covered.

Can't find the right size? Check out our custom sizing options


  • Three height ranges accommodate multiple glass door sizes.
  • The Quick Panel is installed in the track of your existing sliding glass door, with no tools required.
  • Extruded aluminum frame made for sliding glass door tracks at least 1" thick. If you are looking for a pet door for your vinyl sliding patio door, check out one of our best sliding panels for sliding glass doors.
  • 3/16" single pane glass is 50% thicker than other single pane panels.
  • Ability to use flap in temperatures as low as -40 degrees Fahrenheit. 
  • Designed to remain sealed in winds reaching 50 mph.
  • Magnets along the sides of the flap for optimal weather resistance.
  • Tough locking cover included.
  • Adjustable step-over heights for your pet's ideal comfort (video demonstration).
  • C-Clamp Lock included for adjustment ranges up to 80 1/4" to lock the slider.  Charley Bar can be purchased separately if you prefer.
  • 90-day return policy and lifetime warranty. 


  • The removable panel is perfect for rental/vacation homes
  • Avoid having to cut permanent holes
  • The Thermo Panel comes in white (high-gloss), black (dark metallic tone) and brushed aluminum to match the interior design of your sliding glass door
  • Lock your pet inside/outside when you need to with the sturdy locking cover
  • Structurally sound and designed for wear and tear

Size Chart

Flap SizeFlap DimensionStep Over RangeOverall Panel WidthRecommended

Pet Height*

Small 6" w x 11" h3" – 5"11 3⁄8"9 – 15"
Medium 8" w x 15" h3" – 5"13 3⁄8"9 – 19"
Large 10" w x 19" h3" – 5"15 3⁄8"9 – 23"
Extra Large 12" w x 23" h3" – 7" (ships at 5")17 3⁄8"9 – 29"


The recommended pet width is generally 1 – 2" added to the width of the flap. Do not know which size to get? Here is a measurement guide to help you out.

Track Height Adjustment Range is the measurement of your door height from the lowest point of your track to the highest point. Review our Track Measuring Guide for more information. The Endura Flap Quick Panel 3 comes in three adjustable ranges:

  • Short: 74 3⁄4" – 77 3⁄4"
  • Regular: 77 1⁄4" – 80 1⁄4"
  • Tall: 93" – 96 1⁄4" (additional cost)


If your measured track height does not fall within one of the ranges above, we can make a custom height. Custom height option may take up to 4 weeks to special order the glass and build the panel. If your measured track height is near the bottom of the adjustment range then you should review A Note of Caution.


Additional Information

Frame Material

Heavy Extruded Aluminum

Track Width Minimum


Flap Material

Engage Polyolefin

Flap Colors


Flap Thickness


Flap Warranty (if separate)


Dual or Single Pane

Single Pane 3/16" Thick

Warranty Period


Return Period

90 days (except for custom height ranges)

Locking Cover Material

Dimensional ABS

Your Maximum Pet Size

Cats, Large Cats, Small Dogs, Medium Dogs, Large Dogs, X-Large Dogs

Climate Suitability

Temperate-3 Season

House Locking Method

C-Clamp Lock

Flap Design

Single, One Part, Flexible, Insulated Flap

Can Be Installed In

Dual Pane Glass Sliding Glass Door, Sideways Sliding Windows, Single Pane Glass Sliding Glass Door, Vinyl-Framed Sliding Glass Door

Custom Heights Available


High Aspect Ratio


Award Winning Design


Sealing Value

Very High

Wind Resistance

Very High

Insulation Value


Installation Instructions

Please Note: This video features the Endura Flap® Thermo Panel 3e, which is the same as the Quick Panel 3 with the exception of dual pane Low-E glass instead of single pane tempered glass. The installation process is the same for both panels.



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 Threshold mount deadbolt with screws


The aluminum, vertical panel has a patented ‘Adjustable Step-Over’ feature which permits adjusting the height of the flap to the most comfortable fit for your pet. Generally, the top of the flap should be positioned to be at least 1” (2,5 cm) above the top of the pet’s shoulder (the ‘withers’). If the factory setting is not suitable, please adjust it before proceeding. If the current setting is suitable, or you have the vinyl panel, proceed to step 3.


ADJUSTING THE STEP-OVER HEIGHT - OPTIONAL (for aluminum panels only)

Step 1A: Two-piece panels: Simply slide the pieces up and out from the bottom half of your panel to rearrange. Loosen a bottom screw if the pieces are too snug to move.

One-piece panels: Lay the entire panel on a flat surface (like the floor). Using a #2 Phillips head screwdriver, remove the bottom side-screws, and loosen the next upper screws one turn. Screws were tightly installed to hold the panel together during shipping; a drill is recommended*.

*If you do not have a Phillips head drill bit skinny enough to fit, let us know and we’ll send you one for free.

Step 2B: One-piece panels: Once the bottom screws have been removed and the next upper side-screws loosened, the Pet Door Assembly and spacers can be removed by sliding the sections down and out of the panel. 

Step 2C: Replace the spacers and the Pet Door Assembly by sliding them back in a different order to achieve the desired height. You can move the spacer below or above the flap to raise or lower the flap height.

The order of the pieces is important! The piece on the bottom needs to always be at the bottom, as that is where the screws attach. 

When finished, replace the bottom side-screws and tighten the next upper-side screws for one piece panels and skip to step 4. For two-piece panels, you can now assemble the patio panel!

Please Note: A lower step-over height is easier for pets to navigate. However, if the top of the flap is low enough that the pet needs to crouch to get through their pet door, they can injure themselves and possibly cause the pet door to malfunction. If your pet door does not sit at a comfortable height for your pet, you may need a larger size flap. 



(if you have a single piece panel, please proceed to step 4)

Step 3A: Align the aluminum connectors extending from the bottom flap panel section with the top glass panel section. Press the aluminum connectors into the holes at the bottom of the top glass panel section. Ensure locking cover & thumb screws are on the same side!

Step 3B: Gently tap the bottom surface of the panel against the ground to completely insert the connectors. Protect hard surfaces to prevent scratching. The components of the panel are designed to slide together very tightly.

Step 3C: Fasten the two panels together using the four stainless steel hex head screws found in the panel packaging. Use the hex wrench to tighten screws so the two halves of the door are pulled together.
Please Note: Screw holes may look misaligned; this is intentional to ensure a tight fit. The panels will squeeze together as the screws are tightened.

Step 4: Loosen the thumb screws at the top of the pet panel. This allows the spring mechanism to move freely up and down.

Step 5: To insert the panel pet door 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. If you can’t quite get it in the track, try swinging in from the outside as the outside track wall may be shorter.

You want to put the pet door in your track before applying any weather-stripping to ensure it fits! If it fits well, move on to the next step. See our tips at the end of these steps if you have trouble!

Step 6: Once you’re sure the panel fits, remove the panel 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 7: The center post weather seal strip (draft stopper) should be installed on the inside of the home. It can install on either the back edge of the sliding door panel or the leading edge of the stationary panel. This strip prevents air leaking between the sliding glass door and the stationary panel. Trim with scissors as needed. Clean the edge of your patio door with rubbing alcohol before installing to assure a good seal.



Since you cannot lock your sliding glass door to your panel pet door, we have provided you with an alternative locking method to secure your home:

Installing the sliding door clamp: This clamp has a screw which tightens by hand to prevent the sliding door from moving beyond the clamp’s placement. For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door’s raised track.


The Leaf Blower Test

The Quick Panel 3 Patio Panel Pet Door

Note: Video shows the Thermo Panel 3e which is identical except for dual-pane, low 'e' glass rather than single-pane tempered glass for the Quick Panel 3

How to Adjust the Step Over on an Endura Flap® Patio Panel

Design of the Endura Flap™

Installing a Patio Pacific Panel Pet Door

Removing Side Magnets

Variable Magnetic Resistance


What do I do if none of the height options will fit my door?

If none of the panel sizes will fit your door track, you can order this same door with custom sizing options.

Can an intruder remove the Endura Flap dog door for slider from the outside?

No, the thumb screws are on the inside of the panel, so once installed, the Endura Flap pet door panel cannot be lifted out and removed without first loosening the thumb screws from inside the home.

Does the Endura Flap dog door sliding door come with locking covers for security?

Yes, these dog doors come with locking covers to ensure safety for your pet and home. Endura Flaps have locking covers that slide over them on the side facing inside your home and are made of sturdy, heavy duty ABS plastic. Unfortunately, they cannot be used on the outside of Endura Flap Panels as an alternative.

What locking mechanism can I use for the Quick Panel 3?

You'll install the included clamp lock. Alternatively, you can purchase a Charley Bar for added security.

Do the Endura Flap panels require tools for installation?

Endura Flap sliding glass dog doors under 80 ¼” do not require tools, however everything above this height generally will require some tools for installation. What we call a sectional panel will be shipped in two pieces because it is so tall. Breaking the pet door for sliding door down saves the customers on shipping costs, because we are able to ship in a smaller package. The sectionals will need to be assembled with 4 hex screws and a hex wrench, all of which are provided.

What is the tallest height available for a Endura Flap Panel?

For the patio pacific endura flap quick panel 3 or the thermo panel 3e the tallest non-custom height range available is 93 1/4"-96 1/4".

What is the difference between the model 01PPC12 and the model 01PPC12S?

The S at the end denotes that it is a Quick Panel with the single pane glass as opposed to the Thermo Panel with the dual pane glass.

What is the difference between the Endura Flap Thermo Panel and the Endura Flap Quick Panel?

The Thermo and Quick Panels are identical except the Quick Panels have heavy duty single pane glass while the Thermo Panels have dual pane, low 'E' glass. For this reason, the Quick Panel is a better fit for more moderate climates or where a lighter weight panel is desired and the Thermo panel is more suitable for four season use.

Is the Thermo Panel 3e or the Quick Panel 3e more appropriate for extreme weather?

The Thermo Panel 3e is more appropriate for extreme weather because of the dual pane, low 'E' glass.

How long is the warranty for my Endura Flap Panel Door?

The warranty for the Endura Flap assembly has a lifetime warranty for the rest of the assembly (the panel) is for 10 years and excludes glass breakage. The warranty for assemblies employed in commercial kennels are warranted for 3 years.

What is the anti-whoops feature that is included in all Endura Flap Panel Doors?

The anti-whoops feature is included in all Endura Flap ® doggie door for sliding door dog doors. If you've mismeasured, you may be able to salvage the situation: To make your sliding glass door with dog door about 1" taller, you may purchase a height extension (or make your own using 1" x lumber). To make your sliding glass pet door insert slightly shorter you may trim the top flanges that accept the height extension with a hacksaw or a jigsaw with a metal cutting blade.

What does the Draft Stopper do for my sliding panel door?

Also known as the 'Center Post Weather Strip', it seals the gap created between stationary and sliding glass doors when a panel doggy door is installed. These are essential for an airtight seal and in fact some customers use one inside and one outside in extreme climates. We included it in all Thermo Panel 3e, Quick Panel 3 and Thermo Panel 3e Microchip sliding glass pet doors for sliding glass doors, but you can use our draft stopper with any panel pet door.

Do I order the step over as a certain height or can I change that at home?

The step over is made to be adjusted when you receive it, this way you can make sure that is set to the best level for your pets. You can have your pet patio door insert at 3"-5" for small through large sizes, and 3"-7" for extra large.

What if my small dog or cat can't push the flap?

There are magnets on the side and bottom that can be taken out to help your smaller pets gain access. Every pet needs to go potty and should use the door! Please see the 'Videos' tab for instructions.

How do I lock my slider since this cannot match with my existing lock?

We include a lock with purchase. For panels up to 80 1/4"" you will receive a clamp lock that attaches to the frame to push the slider against the panel insert. For panels with a greater height, you could also go with a Charley Bar or the old broomstick in the track.

Does this come in a double flap?

No, these panels are only single flap models. This flap insulates so well, it protects against weather better than other dual flap models.

I want to take this in and out of my slider, how heavy is this?

This insert is made for temporary installs, including taking the insert in and out. The weight increases per flap size, but these inserts will average 20-25 pounds in weight.

Is this flap clear?

It is not completely transparent, although you may be able to see the shadow of your pet just before they come back in the house. It is similar to a shower door, where you can tell something is on the other side, but it is fuzzy.

How loud is it when it opens and closes?

When the bottom of the flap meets the magnet bar, there will be a clicking sound. For jittery, small pets, you may want to tape down the magnet bar to reduce sound while training them.

How often will I need to replace the flap?

We are confident in the quality of this door and have instituted a lifetime warranty for the endura quick panel. Replacements vary with every household just depending on usage. More active dogs and harsher winters will need a replacement flap sooner than others.

Do I need an electronic pet door for my patio or will a regular manual one do?

Generally, we recommend that if you do not have a specific reason to get an electronic sliding pet door then you should get a regular manual one. There is less that could go wrong as far a possible malfunctioning. However, if you've got a stray cat problem or a raccoon problem, you'll need an electronic patio panel which would keep all unwanted animals out. Another aspect to think about is if your dog or cat is infirm or very old, one of the motorized panels that allows them in and out freely without them needing to push a flap might be the ticket to a comfortable and easy process for your pet.

Can the Endura Flap Panel come with an electric door?

We have the Thermo Panel 2e Microchip Patio Panel that incorporates the SureFlap Microchip Pet Door into our dual pane glass panel.  This is suitable for large cats and small dogs, as the flap dimension is 7” x 7” and works off your pets embedded microchip. If your pet does not yet have the chip then it comes with an RFID collar key that can be used.

What if my sliding glass door has a monorail (raised) track instead of a channel ("U" shaped) track?

If your monorail is 3/4" or less thick, you can install the Quick Panel 3 with some modification to the bottom of the panel. You will need to contact customer service to order an additional part not sold on our website. This will be a custom installation requiring the use of a power drill and possibly a jigsaw. Once these modifications have been made, the panel will not be returnable and will become a permanent installation. Here are some pictures of an Endura Flap ® Quick Panel installed in a monorail sliding glass door.

Monorail Sliding Glass Door with Endura Flap Thermo Panel 3e Pet Door
Top view of the Endura Flap Patio Panel Pet Door installed in a monorail patio door
Bottom view showing modifications made to the Endura Flap Pet Panel to fit monorail doors
Piece to install on the bottom of the Endura Flap Thermo Panel 3e to fit mono rail sliders



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.

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