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The Endura Flap™: Engineered to be the Best


A tight seal is the first defense against the weather. The Endura Flap has solid magnets along the sides as well as magnets at the bottom of the flap. The total magnetic seal ensures there are no gaps along the sides.

Magnets allow the Endura Flap to seal in all weather

A single-walled doggy door flap is not satisfactory for the same reason that single-pane glass is not: It just doesn't insulate very well. While single-pane glass is completely replaced these days by dual-pane glass, most pet doors sold on the market today provide no more than a 1/ 8" thickness of vinyl between the living area of the home and the outside weather. The Endura Flap™ dog door consists of a sealed unit that is slightly thicker than a dual-pane glass unit and provides comparable insulation qualities.

Most insulating pet door keeps air from transferring through it with this design

Heat transfer across an air space in a sealed unit is caused by air currents moving within the space. These currents are caused by the continuous heating and cooling of the air inside the unit. The Endura Flap™ doggie door is divided by horizontal barriers which serve to reduce the effect of these air currents.

A trade off - We could have filled the flap interior with insulation for better insulation performance. We didn't for the same reason that dual pane windows aren't filled with insulation: It's better if you can see through.

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The first design requirement of the Endura Dog Door Flap was that it be flexible. Though the chance of injury, especially pinching, is small in a rigid flap pet door, it is nevertheless real. Over our 40 years in business, we have encountered injury in all types of rigid flap pet doors. The Endura Flap™ dog door flap is soft, flexible and safe, thereby preventing the risk of pinching and any other rigid pet door related injuries!

Cold weather pet door works even in snow and rain as well as desert sun

Vinyl flaps perform poorly and eventually fail in the cold. Every winter we hear about vinyl flaps in doggy doors that became stiff in the cold. Usually the vinyl flaps just don't retain enough flexibility to close properly. Sometimes, they get so stiff they break off as the dog attempts to go through! There are low temperature vinyls available that retain more flexibility in cold weather. However, they are softer and less durable and will need replacement more often.

The Endura Flap™ is not made from vinyl. Our pet door flap is manufactured from a polyolefin-based polymer which remains flexible to -40f!

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You want your pet door to be flexible, yet remain secured shut even on the most windy of daysThe worst performance a pet door can have is when it blows open in the wind. Then it's really leaking a lot of air! This can prove costly when you’re trying to keep your heat in during the winter, or stay cool during the summer.

The Endura Flap™ pet door has been proven in a wind tunnel to resist blowing open in winds in excess of 50 mph! In the same comparison testing, two of the largest selling pet doors on the market blew open at approximately 20 mph.

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Nearly all customers have been satisfied with Endura Flap™ wind resistance "out of the box". However, magnet kits are available to further increase wind resistance. Each size will accept up to two additional magnet pairs across the bottom of the flap which increases the magnet strength in that area by 50% to 300% depending upon the size of the flap. Some users would like the flap to be easier to push open while training. The Endura Flap™ design allows for temporary elimination of magnets on the sides as well as across the bottom, making the flap easy to push open.

When having the pet door shared by multiple pets, sometimes our customers remove one of the magnets out of the Endura Flap so it is easier to push on one side for smaller pets! Removing one magnet doesn’t jeopardize the sealing value or wind resistance by a noticeable amount, and it works out well for smaller pets! Here is a video demonstrating how the Endura Flap™ holds up to wind!

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UV retardant prevents cracking and wrinkling in the sun. The sun’s rays are very harsh and will produce a yellowing effect on vinyl flaps. Besides yellowing, vinyl is weakened by prolonged exposure to ultra-violet, which may cause the doggy door flap to warp in size, or harden and ‘chip’ away. This in turn causes the consumer to buy replacement flaps on a frequent basis.

Most flaps turn yellow and warp after sun exposure, whereas the Endura door flap stays the same flexible material that seals tightly to keep out the heat

The Endura Flap™ material is specially treated with a powerful UV retardant and it's not made from vinyl. Intense test chamber exposure equivalent to 2 years of Florida sunlight caused no yellowing or degradation of the Endura Flap material. At the same time we tested the Endura material, we tested vinyl flap samples from every leading pet door manufacturer. In each case, there was significant yellowing, crackling and degradation of the material.

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The frame of the Endura Flap is made of high quality aluminum that will not bend or break even with the toughest dogs using the door all day, every day. You have three color options to choose from to best match your decor: white, tan, or bronze (nearly black).

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The locking cover that is included with every Endura Flap pet door is as strong as 1/16th sheet of steel. It cannot be removed from the outside, or kicked down. When you want to remove the cover, it is simple to do from inside your home with its spring latch design.

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Anyone who has used a pet door for any length of time has seen that the cost of replacing the flaps can exceed the original cost of the pet door. Many of these flaps break at the top where the flap flexes as the pets pass through.

Rotating on a rod allows the flap to outlast other brands that flex at the top and tear over time Eventually, the repeated flexing causes the vinyl to crack and tear in just the same way that repeated flexing of a coat hanger will cause it to break. The Endura flap pet door's design allows it to be flexible and extremely durable at the same time. The flap rotates at the top on a rod to eliminate the stress from repeated flexing of the flap material.

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Endura Flap™ Pet Doors Are 100% Designed, Engineered and Manufactured in the USA. They are hand made in San Luis Obispo, California. If you experience any issues with your pet door, we are here to work with you to make it right. We will replace any defective parts at no cost to you.

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The Endura Flap™ uses a polyolefin-based polymer (similar to material used in food storage containers) which is a non-toxic material that is recyclable and safe for the environment. Vinyl (also known as PVC) is the most popular material used for flaps in the US today. Every flexible flap pet door currently available in PetSmart, PetCo or any other mass merchandiser is made of vinyl.

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Patio Pacific was incorporated in 1976 specifically to market a new type of pet door--the 'panel' pet door for sliding glass door. This new product, the 'Instant' Pet Door, was the first of it's kind to offer an adjustable height capability which was desperately needed because sliding glass door tracks are not all the same height. It is a tribute to Lucile, founder of the company, that she had the vision to see a need in the market and the initiative to start a company from scratch to meet that need.

Extreme weather dog door options were few and far between so the company in more recent years went all in on designing the perfect hot and cold weather dog doors. Patio Pacific has developed the 'Endura Flap' line of patented insulated dog doors that address the 12 important factors that define pet door excellence. With the patio pacific flap these high-performance pet doors won the coveted Fancy Publications Editor's Choice Award in 2007 based upon their superior technology. Now available in designs for sliding glass doors, sash windows, kennels and sliding windows. And also in both single-flap and double-flap versions for doors and walls. The single Endura Flap pet door rivals any double-flap competitor and the double Endura Flap versions have proven themselves suitable for the very worst Michigan and Canadian winter weather. So if you're looking for the best insulated dog door you've come to the right place!


Patio Pacific Inc Endura Flap™ Pet Door Warranty

To the original purchaser, Patio Pacific Inc 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.

Endura Flap assemblies are warranted for a period of 15 years. Endura Flap™ assemblies employed in commercial kennels are warranted for a period of 3 years.

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 Patio Pacific Inc, together with proof of purchase, will be repaired or replaced and returned to the customer free of charge.

Pet doors of other manufacturers installed in Patio Pacific products are covered by the warranty of the other manufacturer and not by Patio Pacific.

We get mail

Just a quick note to let you know how wonderful the Endura Flap line is. We live in the country -basically in the corn fields. Now that the crops are down there is nothing to stop the winds!! We had 50 + MPH winds yesterday & the flap held the wind & never opened! We have 5 French bulldogs & 3 Dobermans & the door is in constant use. It is awesome! I just ordered another for the utility room! Thanks for such a superior product! Paws up with praise!!!! 
Debra B., Beecher, IL


The door continues to work flawlessly after two and half years and we just love it. We enjoy it so much we are considering installing your "Patio Pacific Self-Framing Wall Mount" Featuring the new "Endura" flap".  We can't say enough of the quality of construction and how much our two Lhasa Apso's enjoy it. 
Dean K., Belgrade, MT


We got the Thermo Panel 3e today and installed it in less than a half hour. I'm impressed with the quality, industrial-strength nature of the product. "First dog" got the hang of it after a few of the included treats enticed her through. "Next dog" is a little shyer, but is learning from watching her sister. I'm impressed with the engineering of the product. So glad I waited a few weeks to get the best. Thanks.
Joseph M., El Prado, NM

Click below to expand:

  • Which Patio pacific endurance flap is best for extreme climates?
  • The Patio Pacfiic Endura Flap model depends on your installation location. If you are installing in a door or wall, and your pet is not timid, we recommend installing the Double Flap model..