Ideal "Fast Fit" Cat Door for Sliding Glass Doors
- Tool-free, easy installation for aluminum sliding door tracks (min. 7/8" wide)
- Accommodates cats of all sizes with a clear, unbreakable polycarbonate flap
- 4-way locking system offers flexible access control for your feline friends
- Foam Bumper Seal and Vinyl Draft Seal included for increased insulation
- Adjustable height ranges: 75"-77.75", 77.625"-80.375", and 93.75"-96.5"
-
Note: Made-to-order which takes approximately 5 days

Product Details
The Ideal "Fast Fit" Cat Door for Sliding Glass Doors is a cost-effective solution for providing your feline friends the freedom to come and go as they please. Its tool-free installation makes it perfect for aluminum sliding door tracks with a minimum width of 7/8", and the adjustable height range accommodates various door sizes, ensuring a perfect fit for your home.
Featuring a clear, unbreakable polycarbonate flap, this cat door is suitable for cats of all sizes. The 4-way locking system allows you to control your cat's access to the outdoors, with options for complete lock, unlocked, in-only, or out-only settings.
The Ideal "Fast Fit" Cat Door for Sliding Glass Doors also prioritizes energy efficiency. With Foam Bumper Seal and Vinyl Draft Seal included, you can rest assured that your home's insulation remains intact while providing your cat with the freedom they crave.
Though the weatherstripping may require some supplemental sealing to ensure an airtight fit, many have found that the benefits of this cat door far outweigh the initial installation adjustments. While the flap may produce some noise when used, it ultimately offers a convenient and secure solution for your cat's comings and goings.
Customers have praised the ease of installation and the improved quality of life for both them and their cats. By allowing your cat the freedom to access the outdoors, you'll no longer need to leave your sliding door cracked open, ultimately reducing your energy consumption and ensuring a more secure home.
The Ideal "Fast Fit" Cat Door for Sliding Glass Doors is an excellent investment for those seeking a convenient, energy-efficient solution for their feline family members.
Need to replace the frame? Check out our full selection of Ideal Pet Door Products.
Features:
- Perfect for rentals and vacation homes with non-permanent installation
- Offers a sleek, unobtrusive look in sliding glass doors
- 4-way locking system for selective entry and exit options
- Energy-efficient weatherstripping and draft stopper included
- Ideal for temperate, three-season climates
- Available in three adjustable track height ranges:
- 75" - 77 3/4"
- 77 5/8" - 80 3/8" (exact height range)
- 93 3/4" - 96 1/2"
- Pin lock provided to lock the sliding glass door. If you do not want to do any drilling, you can purchase a Charley Bar.
Benefits:
- Tool-free installation
- Can install without permanent changes, especially great for rentals and vacation homes
- Clear flaps are easy to use
- Ideal cat door for sliding glass doors look sleek in the door
The Large Ideal Fast Fit Sliding Glass Cat Door is also known as the "ChubbyKat Large Cat Door."
Size Chart
- Cat Flap6 1/4"w x 6 1/4"h
- Large Cat Flap7 1/2"w x 10 1/2"h
Flap Dimensions:
6 1/4"w x6 1/4"h
The entry way your dog goes through.Step Over Range:
4"h
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width:
10"
How wide the panel is overall.Flap Dimensions:
7 1/2"w x 10 1/2"h
The entry way your dog goes through.Step Over Range:
4”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width:
12”
How wide the panel is overall.Flap Size | Flap Dimension | Step Over | Overall Width | Recommended Pet Height* |
---|---|---|---|---|
Cat Flap | 6 1⁄4" w x 6 1⁄4" h | 4" | 10" | 4" - 8" |
Large Cat Flap | 7 1⁄2" w x 10 1⁄2" h | 4" | 12" | 4" - 15" |
The recommended pet width is generally 1 – 2" added to the width of the flap.
Still do not know which flap size to get? Here is a measurement guide to help you out.
Height Adjustment Ranges
- B: Shorty 75" – 77 3⁄4" (additional cost)
- C: Regular 77 5⁄8" – 80 3⁄8"
- E: Tall 93 3⁄4" – 96 1⁄2" (additional cost)
Custom Height Add-On Extension is available: If your sliding glass door track is not accommodated by one of the stock adjustment ranges, you can special order a height extension for either the Regular or Tall panels. Be sure to read the Details tab carefully to see how to compute how tall you will want the custom height extension to be (maximum is 14").
CAUTION: If your measured track height is near the bottom of the adjustment range then you should review A Note of Caution
Wondering how to measure your track? Review our Track Measuring Guide.
Find The Best Pet Door Size For My Pet

A
Pet Height: inches
B
Pet Width: inches
Installation Instructions
Parts
- 1 Ideal Fast Fit Panel
- 1 Foam Bumper Seal
- 1 Vinyl Draft Seal (two parts)
Tools
- Scissors
Please read instructions & notes thoroughly before installation.
Step 1 Release Height Adjustment Panel

- Release the automatic height adjustment by turning the knobs located near the top of panel counter-clockwise and pressing. The height adjustment panel should fully extend upward (pull up on panel if necessary).
Step 2 Open Your Door

- Open the sliding glass/screen door.
Step 3 Insert Into Track

- Insert the Fast Fit with the knobs facing inside. Place the top edge into the top track of the sliding glass/screen door. Lift up and swing the lower portion of the panel onto the ridge in the sliding glass door (or screen door).
Step 4 Tighten Into Place

- Slide the Fast Fit against the door jamb. Make sure that top is fully extended (not tilted to one side) and the bottom of the panel is on the ridge in the bottom track.
- Hand-tighten the knobs by turning clockwise to lock the Fast Fit in place.
- Apply the bumper seal along the length of the panel where it meets the sliding glass door when closed. Press firmly against the panel rolling it up to the top, where you can cut the end with scissors.
Step 5 Permanent Installation (Optional)

- If you would like to permanently install your panel pet door, you may screw through the aluminum fins that protrude on the existing sliding glass door frame of your door. Drill through the fins into the Fast Fit. Install two screws in the top and two in the side by the bottom of door.
Optional Permanent Placement for Fixed Panel Sliding Door:
Remove the screws that hold the fixed glass panel in place and slide it over. Insert the Fast Fit panel between the stationary panel and it's jamb. Re-fasten the fixed glass panel.
Installing Security Lock (Optional):
Step 1: With the sliding door in a closed position, place the lock in the desired location with the bolt in the retracted position, pointed toward the sliding glass door or stationary window rail. Leave clearance between the bolt tip and the aluminum rail.
Step 2: Holding the lock firmly in place, mark the screw holes and center of the bolt in the rail of the sliding door or stationary window.
Step 3: Drill two 5⁄32" holes for the mounting screws and a hole for the locking bolt. Do not drill into glass.
Step 4: With the sliding door in the closed position (with Fast Fit installed), mark the position for the second set of holes.
Caution: Do not drill into glass.
Videos
How to Measure Your Sliding Glass Door for a Pet Door
FAQ
How is this different than the regular Ideal Fast Fit? Unlike the other Ideal Pet Product, the Ideal sliding glass cat flap door is smaller and rigid (like regular cat flaps), but the panel is the same. The Ideal Fast fit is a sliding glass pet door with a flexible flap. |
Does this panel come in custom heights like the Custom Ideal Fast Fit? No, but the pet patio door panel has an adjustable height that can fit into most tracks. If needed, you can order one size down from what you need height wise and get an Ideal Fast Fit height extension separately. |
What material is the flap? The cat door sliding door model has a rigid polycarbonate flap instead of flexible vinyl. |
Does the cat door come in any larger sizes? If your cat cannot fit through the large cat flap, then we would suggest ordering a regular Ideal "Fast Fit" panel with larger flap openings. |
How do I lock the cat door? There is a manual locking mechanism on the door that can be turned when you don't want the door in use. Since this is a manual flap, your cat does not need a collar key or microchip to use it. |
How do I lock the panel to my sliding glass door? The door comes with a pin lock (that needs tools to be installed into your aluminum frame), or you can purchase a Charley Bar. |
Is this panel suitable for extreme weather? The ideal fast fit sliding cat door is best used in moderate climates. |
Is the cat door flap clear? Yes, it is 100% clear. |
Can we use the door for a small dog? We recommend the regular Ideal Fast Fit doggie door if you have an x-large dog. If you want a pet door that will work for both dogs and cats, we recommended the Petsafe Freedom Aluminum patio panel pet door, which has a magnetic closure at the bottom of its flexible flap. |
What can I do if the 4" step over is too high for my cat? Unfortunately, the step over cannot be customized for this panel, but you can look into a wooden block step or a ramp to make it easier for your cat to get through. |
Can I install it into my window? No, this deluxe aluminum pet patio door panel is made for sliding doors only. You might be interested in the Thermo Sash 3e, a sash window pet door with Low-e glass. |
How much does shipping cost? Shipping is calculated at checkout. |
Warranty
Disclaimer:
The new and revised warranty that follows this disclaimer supersedes any and all previous warranties of whatever nature or description, whether express, implied or set by law. Any unexpired warranties shall now be governed by the terms of the new warranty for the duration of the existing warranty’s unexpired term.
One Year Warranty:
Ideal’s pet doors are very durable and with the proper care will provide many years of service for you and your pet. Thank you for selecting Ideal for your pet door. However, please be aware the pet doors are not waterproof against inclement weather or any excessive water exposure. The one year warranty set forth below applies to Ideal’s pet door(s).
This product has a One Year Warranty from the date of the purchase of the product to be free of manufacturer’s defects in workmanship and materials. This express One Year Warranty is limited only to the original purchaser of the product and is non-transferable. Satisfactory proof of purchase must be provided to the manufacturer for this one year warranty to apply. In that case, the manufacturer will replace at no charge to the purchaser the defective part(s). No refunds will be provided to the purchaser. No service contract is being provided under this One Year Warranty. Proof of purchase so that the One Year Warranty may be honored must be made to:
Ideal Pet Products, Inc.
24735 Avenue Rockefeller
Valencia, California, USA 91355
Attention: Warranty Department
(661) 294-2266 / 1-877-IDEALPET (433-2573)
Any and all implied warranties are expressly disclaimed and of no force or effect. These warranties include, but are not limited to, the implied warranties of merchantability, implied fitness for any intended purpose, and any warranties under the California Song-Beverly Consumer Act.
This One Year Warranty is void if the damage is due to improper installation, intentional misuse or abuse, repairs by anyone other than the manufacturer, the failure to follow manufacturer’s instructions, or if the product is being used for commercial purposes. Purchaser assumes all risks and liabilities for the misuse or abuse of the product, the commercial use of the product, or the failure to follow the manufacturer’s instructions.
This One Year Warranty only applies if the product is used for domesticated animals. The Manufacturer, Ideal, is not responsible and shall not have any liability for any damage to or defects caused by acts of God, criminal activity, dog abuse including, but not limited to chewing on the door, lightening, abuse, alteration, trespassing, children’s use of the product, unauthorized access, entry by non-domesticated or “stray” animals, or any other unintended use or misuse of the product.
The Manufacturer, Ideal, disclaims and excludes any liability for incidental, consequential, punitive, general, special, or other damages arising out of or connected with the purchase, use, or misuse of the product or concerning any warranty herein.
This One Year Warranty shall be governed by the laws of the State of California, USA. Venue shall be with the Los Angeles Superior Court, North Valley District.
Warning:
This product, or any of its accessories, parts, or attachments may not prevent adults, children, animals, insects, or objects from passing through or using the opening created by the product.
Ideal Pet Products will not be liable for any unintended or accidental usage, misuse, abuse, criminal conduct, water intrusion, acts of god, damages or injuries occurring or accruing from the use of this product except in strict accordance with Ideal's One Year Warranty accompanying the sale of this product to the original purchaser.
Customer Reviews

Size Chart
- Cat Flap6 1/4"w x 6 1/4"h
- Large Cat Flap7 1/2"w x 10 1/2"h
Flap Dimensions:
6 1/4"w x6 1/4"h
The entry way your dog goes through.Step Over Range:
4"h
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width:
10"
How wide the panel is overall.Flap Dimensions:
7 1/2"w x 10 1/2"h
The entry way your dog goes through.Step Over Range:
4”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width:
12”
How wide the panel is overall.Flap Size | Flap Dimension | Step Over | Overall Width | Recommended Pet Height* |
---|---|---|---|---|
Cat Flap | 6 1⁄4" w x 6 1⁄4" h | 4" | 10" | 4" - 8" |
Large Cat Flap | 7 1⁄2" w x 10 1⁄2" h | 4" | 12" | 4" - 15" |
The recommended pet width is generally 1 – 2" added to the width of the flap.
Still do not know which flap size to get? Here is a measurement guide to help you out.
Height Adjustment Ranges
- B: Shorty 75" – 77 3⁄4" (additional cost)
- C: Regular 77 5⁄8" – 80 3⁄8"
- E: Tall 93 3⁄4" – 96 1⁄2" (additional cost)
Custom Height Add-On Extension is available: If your sliding glass door track is not accommodated by one of the stock adjustment ranges, you can special order a height extension for either the Regular or Tall panels. Be sure to read the Details tab carefully to see how to compute how tall you will want the custom height extension to be (maximum is 14").
CAUTION: If your measured track height is near the bottom of the adjustment range then you should review A Note of Caution
Wondering how to measure your track? Review our Track Measuring Guide.
Find The Best Pet Door Size For My Pet

A
Pet Height: inches
B
Pet Width: inches
Installation Instructions
Parts
- 1 Ideal Fast Fit Panel
- 1 Foam Bumper Seal
- 1 Vinyl Draft Seal (two parts)
Tools
- Scissors
Please read instructions & notes thoroughly before installation.
Step 1 Release Height Adjustment Panel

- Release the automatic height adjustment by turning the knobs located near the top of panel counter-clockwise and pressing. The height adjustment panel should fully extend upward (pull up on panel if necessary).
Step 2 Open Your Door

- Open the sliding glass/screen door.
Step 3 Insert Into Track

- Insert the Fast Fit with the knobs facing inside. Place the top edge into the top track of the sliding glass/screen door. Lift up and swing the lower portion of the panel onto the ridge in the sliding glass door (or screen door).
Step 4 Tighten Into Place

- Slide the Fast Fit against the door jamb. Make sure that top is fully extended (not tilted to one side) and the bottom of the panel is on the ridge in the bottom track.
- Hand-tighten the knobs by turning clockwise to lock the Fast Fit in place.
- Apply the bumper seal along the length of the panel where it meets the sliding glass door when closed. Press firmly against the panel rolling it up to the top, where you can cut the end with scissors.
Step 5 Permanent Installation (Optional)

- If you would like to permanently install your panel pet door, you may screw through the aluminum fins that protrude on the existing sliding glass door frame of your door. Drill through the fins into the Fast Fit. Install two screws in the top and two in the side by the bottom of door.
Optional Permanent Placement for Fixed Panel Sliding Door:
Remove the screws that hold the fixed glass panel in place and slide it over. Insert the Fast Fit panel between the stationary panel and it's jamb. Re-fasten the fixed glass panel.
Installing Security Lock (Optional):
Step 1: With the sliding door in a closed position, place the lock in the desired location with the bolt in the retracted position, pointed toward the sliding glass door or stationary window rail. Leave clearance between the bolt tip and the aluminum rail.
Step 2: Holding the lock firmly in place, mark the screw holes and center of the bolt in the rail of the sliding door or stationary window.
Step 3: Drill two 5⁄32" holes for the mounting screws and a hole for the locking bolt. Do not drill into glass.
Step 4: With the sliding door in the closed position (with Fast Fit installed), mark the position for the second set of holes.
Caution: Do not drill into glass.
Videos
How to Measure Your Sliding Glass Door for a Pet Door
FAQ
How is this different than the regular Ideal Fast Fit? Unlike the other Ideal Pet Product, the Ideal sliding glass cat flap door is smaller and rigid (like regular cat flaps), but the panel is the same. The Ideal Fast fit is a sliding glass pet door with a flexible flap. |
Does this panel come in custom heights like the Custom Ideal Fast Fit? No, but the pet patio door panel has an adjustable height that can fit into most tracks. If needed, you can order one size down from what you need height wise and get an Ideal Fast Fit height extension separately. |
What material is the flap? The cat door sliding door model has a rigid polycarbonate flap instead of flexible vinyl. |
Does the cat door come in any larger sizes? If your cat cannot fit through the large cat flap, then we would suggest ordering a regular Ideal "Fast Fit" panel with larger flap openings. |
How do I lock the cat door? There is a manual locking mechanism on the door that can be turned when you don't want the door in use. Since this is a manual flap, your cat does not need a collar key or microchip to use it. |
How do I lock the panel to my sliding glass door? The door comes with a pin lock (that needs tools to be installed into your aluminum frame), or you can purchase a Charley Bar. |
Is this panel suitable for extreme weather? The ideal fast fit sliding cat door is best used in moderate climates. |
Is the cat door flap clear? Yes, it is 100% clear. |
Can we use the door for a small dog? We recommend the regular Ideal Fast Fit doggie door if you have an x-large dog. If you want a pet door that will work for both dogs and cats, we recommended the Petsafe Freedom Aluminum patio panel pet door, which has a magnetic closure at the bottom of its flexible flap. |
What can I do if the 4" step over is too high for my cat? Unfortunately, the step over cannot be customized for this panel, but you can look into a wooden block step or a ramp to make it easier for your cat to get through. |
Can I install it into my window? No, this deluxe aluminum pet patio door panel is made for sliding doors only. You might be interested in the Thermo Sash 3e, a sash window pet door with Low-e glass. |
How much does shipping cost? Shipping is calculated at checkout. |
Warranty
Disclaimer:
The new and revised warranty that follows this disclaimer supersedes any and all previous warranties of whatever nature or description, whether express, implied or set by law. Any unexpired warranties shall now be governed by the terms of the new warranty for the duration of the existing warranty’s unexpired term.
One Year Warranty:
Ideal’s pet doors are very durable and with the proper care will provide many years of service for you and your pet. Thank you for selecting Ideal for your pet door. However, please be aware the pet doors are not waterproof against inclement weather or any excessive water exposure. The one year warranty set forth below applies to Ideal’s pet door(s).
This product has a One Year Warranty from the date of the purchase of the product to be free of manufacturer’s defects in workmanship and materials. This express One Year Warranty is limited only to the original purchaser of the product and is non-transferable. Satisfactory proof of purchase must be provided to the manufacturer for this one year warranty to apply. In that case, the manufacturer will replace at no charge to the purchaser the defective part(s). No refunds will be provided to the purchaser. No service contract is being provided under this One Year Warranty. Proof of purchase so that the One Year Warranty may be honored must be made to:
Ideal Pet Products, Inc.
24735 Avenue Rockefeller
Valencia, California, USA 91355
Attention: Warranty Department
(661) 294-2266 / 1-877-IDEALPET (433-2573)
Any and all implied warranties are expressly disclaimed and of no force or effect. These warranties include, but are not limited to, the implied warranties of merchantability, implied fitness for any intended purpose, and any warranties under the California Song-Beverly Consumer Act.
This One Year Warranty is void if the damage is due to improper installation, intentional misuse or abuse, repairs by anyone other than the manufacturer, the failure to follow manufacturer’s instructions, or if the product is being used for commercial purposes. Purchaser assumes all risks and liabilities for the misuse or abuse of the product, the commercial use of the product, or the failure to follow the manufacturer’s instructions.
This One Year Warranty only applies if the product is used for domesticated animals. The Manufacturer, Ideal, is not responsible and shall not have any liability for any damage to or defects caused by acts of God, criminal activity, dog abuse including, but not limited to chewing on the door, lightening, abuse, alteration, trespassing, children’s use of the product, unauthorized access, entry by non-domesticated or “stray” animals, or any other unintended use or misuse of the product.
The Manufacturer, Ideal, disclaims and excludes any liability for incidental, consequential, punitive, general, special, or other damages arising out of or connected with the purchase, use, or misuse of the product or concerning any warranty herein.
This One Year Warranty shall be governed by the laws of the State of California, USA. Venue shall be with the Los Angeles Superior Court, North Valley District.
Warning:
This product, or any of its accessories, parts, or attachments may not prevent adults, children, animals, insects, or objects from passing through or using the opening created by the product.
Ideal Pet Products will not be liable for any unintended or accidental usage, misuse, abuse, criminal conduct, water intrusion, acts of god, damages or injuries occurring or accruing from the use of this product except in strict accordance with Ideal's One Year Warranty accompanying the sale of this product to the original purchaser.
- Reviews
- Questions

We love the cat door
My son and I installed the Fast Fit Patio Cat Door in about one hour. We had it on the wrong side at first so it took that long. Once we had it in the right place we could have installed it in 30 minutes. It feels secure and looks perfect. After a day my cat easily navigated the flap. She is now able to go onto my screen porch when I am not home and I don't have to leave the door partly open and affect my air conditioning. When we are away from home I can seal the flap entry with the cover panel provided. Thanks for making such a good product.

Great doors!
Perfect size. So happy with my purchase!
Cats love it!
The door is great for my cats and they adapted in a few hours. By day 3 they were going in and out full speed! The only thing is I have triple outside folding slider and figuring out how to lock the door is a challenge. And the insulation is not very good and the bug gard didn't stay in place so I'll have to buy a better one. For the price it will do.
The insert for sliding glass door has worked out great. Fits in the doorway with no problem. Only thing is that the insulation strip that came with this product was not as good as it should have been. We needed to purchase different insulation stipping
The insert for sliding glass door has worked out great (no tools needed). Fits in the doorway with no problem. Our animals figured out how to use it without much trouble Very pleased.
Overpriced, you dont get what you pay for
I got the exact same door about five years ago for under $100. My new sliding doors are taller, thats the only reason for my new purchase. The weather stripping you get with this is horrible, so I spent $280 on this and now I need to go buy good weather stripping. Not worth the price if you ask me!