Security Boss MaxSeal Lockable Patio Pet Door Insert
Heavy Freight: The price includes curbside shipping to most locations within the 48 contiguous states. Please read our Shipping & Returns Policy for full details.
MaxSeal Pet Doors are designed to be friendly for any size pet to use, but yet provide for a weather proof barrier to the outside. These doors are ideal for extreme cold as well as hot environments. An insulated, reinforced security panel slides in to lock off the pet opening when you what to keep your pet inside or keep opening locked.
The MaxSeal Patio Pet Door is the only dual pane glass insert on the market that is designed to be easily inserted or removed from your sliding glass door opening without the use of screws or mounting hardware. The spring loaded adjustable top ensure a tight fit in your opening and can be secured to protect from would be intruders.
MaxSeal Pet Doors are designed to be friendly for any size pet to use, but yet provide for a weather proof barrier to the outside. These doors are ideal for extreme cold as well as hot environments. An insulated, reinforced security panel slides in to lock off the pet opening when you what to keep your pet inside or keep opening locked.
The MaxSeal Patio Pet Door is the only dual paned glass insert on the market that is designed to be easily inserted or removed from your sliding glass door opening without the use of screws or mounting hardware. The spring loaded adjustable top ensure a tight fit in your opening and can be secured to protect from would be intruders.
Note: We recommend using an adjustable brace bar to lock you sliding door when closed to this unit. Brace bars are the most secure method of locking your slider with a patio insert installed.
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Security Boss Patio Pet Doors allow customers to easily insert and remove the patio pet door so that you can retain the full use of your sliding door opening if you choose.
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The overall width of a Security Boss Patio Pet Door will be approximately 5 1/2 inches greater than the width of the pet opening. For example, a patio panel with a 9" wide x 12" high pet opening will be approximately 14.5 inches wide.
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Step Over Rise Info:
2" Rise measures 3 3/4" off bottom unit 4" Rise measures 5 3/4" off bottom of unit 6" Rise measures 7 3/4" off bottom of unit 8" Rise measures 9 3/4" off bottom of unit |
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Flap Size Opening w x h |
Overall Panel Width |
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Small Medium 7" x 9" |
12.5" |
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Medium 9 "x12" |
14.5" |
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Tall 11"x20" |
16.5" |
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XL Grand 12"x24" |
17.5" |
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Mammoth 15"x24" |
20.5 |
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View of Top Section / Spec Info
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View of Bottom Section / Spec Info
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The top spring-loaded adjusting section of the Patio Pet Door appears as an "H" piece when viewed from the side. The overall width of this piece is 11/16" (Will fit into most any sliding glass door track). The spring-loaded adjustment provides for a 3.25" range for proper fitting into your opening. Most top tracks in sliding glass doors do not have any center rails, however, if you do have this feature then the Insert can straddle any rail at the top 9/16" wide or narrower. The spring-loaded top is secured with 2 thumbscrew locks, accessible from the interior only, so that someone from the exterior of the house would not be able to compress or remove the unit. |
The bottom section of the Security Boss Patio Pet Doors have an overall width of 5/16". A semi-circle, "C" channel is centered and runs the length of the bottom. This "C" channel is design to straddle the center rail in the channel on the floor that your sliding glass door follows. By straddling this center rail, the Patio Pet Door will remain centered to the frame of your sliding door when closed to this unit. Note: If the center rail in the channel on the floor is wider than 5/16", then this patio Insert will not be able to straddle it and as a result may not fit properly in your opening |


Measuring for the Patio Pet Door:
To determine which height range will work with your slider, open the slider and measure from the very bottom inside track to the very top inside track. As you look down on the groove that the slider follows on the floor, you may see a thin rail. You will want to measure down past that rail, from the deepest part of the channel on the floor to the very top inside channel above.
Will These Patio Pet doors fit all Sliding Doors?
As you look at the track on the floor your slider follows; you most often will see a "rail". If this "rail" is narrower than 5/16" (as you look down on it), then the Security Boss Patio Pet Doors should fit your slider.
What is the Rise?:
This is the distance from the bottom of the patio insert to the bottom edge of the pet door frame. The Rise elevates the pet opening. For example a 2" rise will be the same as setting the pet door itself on a 2" block. There are several different rise options available (2", 4", 6", and 8" inches) to accommodate different pets. Selecting the rise along with the proper sized pet opening should result in the opening being higher than the shoulders of your pet to prevent the flap from pinching and also result in an easy step over height that they can use even as they age. As a rule of thumb, a pet opening should be 1.5 - 2" higher than your tallest pet's shoulders.
Included Weather stripping:
Every Security Boss Patio Insert features a replaceable bulb seal that lines both sides of the insert. This bulb seal provides a superior weather seal between the insert and the wall and sliding door. This weather seal can also be replaced if needed very easily by sliding the weatherstripping into the t-slot groove on your patio pet door.
The weather seal is a 3" wide vinyl weather stripping section that attaches to the back side of your sliding door. When an insert is installed, your sliding door breaks the seal between the slider and fixed panel. This weather stripping will seal out any drafts.
Adjustable Height Range:
The top section of the Security Boss Patio Pet Door floats on two tension rods that compress or expand to obtain the best possible fit in the patio door frame. The top is fit into the upper patio slider track and the bottom rests on the bottom slider track. Once in place, there are two thumb bolts that lock the top section into place to prevent the Patio Pet door from being removed from the outside.
How does my Sliding Door Lock?
We strongly suggest bracing the door with a stick or an adjustable brace bar; as this immobilizes your slider and is the most effective way to secure your sliding door. We also offer several locking devices for purchase if your situation requires, click the image above to see our selection.
Different ways to Install the Patio Pet Door:
The Security Boss Patio Pet Door can be mounted on the stationary side of the patio door. Many patio doors have stoppers that normally prevent the stationary panel from moving. If these stoppers can be removed, the stationary panel can be moved to accommodate the patio panel.
Note: This technique will not work on patio doors where the stationary panel is molded into the frame.
Use of Extensions Ranges:
Security Boss makes 4 different height ranges of patio pet doors. You can add 2 inch extensions to the top of all insert heights to extend their reach or adjustment range. These extensions snap into the top of your insert and fit tightly. No screws or hardware are required. It is possible to add more than two (2) extensions on the Security Boss Inserts. The snap in lock feature of the extensions allow for a stable firm unit regardless of the number of extensions are added. This is a great benefit to those who might move to a home with a taller sliding door system.

At Dens and Kennels, we understand that you many options when it comes to retailers, and we strive to stand out for all the right reasons. We believe that it is our responsibility as your partner to not only offer the right range of products, but also the service needed before, during and after your purchase. Our goal is to deliver the single best customer experience possible.
Brands You Trust
We work with small, heritage kennel designers who hand-craft their products, but also with some of the most trusted names in the industry. Choose from brands including the following when you shop with us:
- All Safe Harness
- Carlson
- DenHaus
- Grain Valley
- Havis
- Little Cottage
- Lucky Dog™
- MIM Variocage
- My Pet Cages
- Owens Products
- Rathman & Co
- Rhino Kennels
- Weatherguard™
- Zinger Winger
Our Product Range
While we focus on ensuring you have access to the right kennels and dens, we offer a broad range of additional products, as well. For instance, we can supply doors and gates, outdoor kennels, beds, cat houses, and virtually anything else you require.
Who We Work With
At Dens and Kennels, we’re proud to work with private pet owners, but also with kennel facility owners and operators, hotel owners, and many other customers.
We invite you to contact us today to learn more about our free shipping, our 110% price match guarantee, our industry-best warranty, and our available financing options.

Please Read First
Most dog kennels ship via freight. Freight delivery processes are far different than the regular UPS/Fedex deliveries many customers are accustomed to. As a result, it is imperative you read all the details in the Shipping & Returns Policy. By proceeding with your order, you acknowledge that you have read, understood, and agreed with the Shipping & Returns Policies in their entirety.
LEAD TIMES FOR 2025
During 2025, many items will be available via backorder only. Many popular brands are only building to order as they do not have enough raw materials for mass production.
Please inquire for stock/delivery times on any brand. If you need to purchase a product soon, please do so ASAP as lead times are expected to increase in 2025. It is highly regrettable but out of anyone's control and we wish to be upfront about current market conditions so that you may plan accordingly.
THIS MEANS WHEREVER YOU INQUIRE ONLINE, THE LEAD TIME WILL NOT CHANGE AS ALMOST EVERY RETAILER SHIPS FACTORY DIRECT AT PRESENT.
Order Confirmation
As soon as you place your order you will receive an order confirmation e-mail. Please verify item type and color/dimensions. If you wish to make any changes, you would need to do so prior to your item shipping.
- The Order Confirmation means that we have received your order in our system.
- As soon as we receive your order we automatically verify that the item is in stock and available for immediate shipment.
- If your item is on backorder or unavailable we will void the card authorization and promptly reach out to you via phone or e-mail.
- If your item is in stock we will charge your card and process your order.
You are free to cancel without penalty or obligation prior to your order shipping.
Shipping Your Order
If your item is in stock:
- Your order ship within five business days from the order confirmation date.
- We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.
- Most heavy items are shipped via freight--delivery time is approximately 5-7 business days.
- Please feel free to inquire if you do not receive the tracking information, since the email may sometimes end up in junk or other folders.
- Shipping lead times may be longer than usual during holiday/rush periods. We will immediately inform you if this is the case and obtain your permission to proceed.
DUE TO THE RAPID INCREASE IN FREIGHT PRICES, COAST TO COAST OR LONG DISTANCE SHIPMENTS WILL INCUR ADDITIONAL COSTS. OUR FREE SHIPPING DOES NOT COVER COMPLEX OR LONG DISTANCE SHIPMENTS. PLEASE INQUIRE.
**Please note custom-built kennels and items (ie. Rhino, European, etc) also possess lead times of 2 or more weeks as they are built to order in the USA. Custom or customized items and kennels may not be canceled once in production as resources have been allocated to build your item.**
We will always do our very best to ensure the promptest delivery. Guaranteed shipment dates and express service may be available, please let us know if you need rush service.
IN ORDER TO REMAIN IN COMPLIANCE WITH PAYPAL AND OTHER CREDIT CARD PORTAL POLICIES: DELIVERY ADDRESS CHANGES ARE NOT PERMITTED ONCE AN ITEM HAS ALREADY SHIPPED. ANY RETURNS THIS MAY CAUSE WILL BE TREATED AS A REGULAR RETURN PER OUR RETURN POLICY. PLEASE READ OUR FULL POLICY BELOW FOR INFORMATION ON QUALIFYING RETURNS.
Delivery Instructions
The delivery instructions email will be sent to the same email address as the order confirmation email.
- Once your order has shipped, you will receive a delivery instructions email.
- Please read this email carefully as it outlines how to receive your item and what to do in the event your item or box arrives damaged.
Please note it is a customer's responsibility to read this email and/or familiarize themselves with our Shipping & Returms Policy. Additionally, we highly recommend you check your junk or spam folder at all times.

Damages
Please read the instructions below very carefully as they pertain to refunds and replacements.
Inspect your purchase to ensure that it is in good condition upon arrival and that the number of boxes on the delivery bill match the number of boxes you received. If your item(s)/box arrives damaged or short, it is very important you follow these exact instructions:
- Note the damage on the delivery bill (also known as a bill of lading)
- Note any shortage of items/boxes
- Take photographs of all sides of the box as well
- REFUSE DELIVERY WITHOUT EXCEPTION
- Send the photos to support@densandkennels.com so we can process an insurance claim/replacement.
Examples of damage to a box are: rips, holes, crush, dings, etc.
If the box/package looks OK but you feel the item within may be damaged:
- Note "possible concealed damaged"
In the event the damage is concealed (meaning the box looks good but the item within is damaged)--DO NOT THROW THE BOX AWAY and take pictures of the box as well as the product.
- Disposing of the box at any point or not following the above procedures annuls our ability to process refunds and replacements.
- Insurance/manufacturers require photographs of both the box (all sides) and the product.
It is very important that any damage or shortages are:
- Reported within five calendar days of receipt of the merchandise, due to carrier insurance regulations and rules.
- If the concealed damage is cosmetic only, we reserve the right to first attempt to repair the unit as new with a part or professional assistance.
In order to receive an immediate refund or replacement for concealed damage:
- You agree to hold onto the damaged item and not dispose of it until further instructions are provided by the manufacturer or by us.
- You agree to not dispose of the original box/carton the item came in.
UNDER NO CIRCUMSTANCES WILL AN ITEM BE REFUNDED OR REPLACED IF THE ITEM OR ITS BOX/PACKAGING HAS BEEN DISCARDED.
If you have any questions, do not hesitate to contact us immediately at 407-347-2363 and we will be glad to promptly assist you or answer any concerns.

Cancellations & Refunds
We want you to be completely satisfied with your order. All purchases may be canceled at no cost prior to shipment. If there are any third party or carrier errors, you agree to let us help you resolve these in a timely manner.
Should you decide to cancel/return the order once it has already shipped:
- 30-Day return window from the time product is shipped
- Unfortunately no returns after 30 days
- You (the buyer) will be responsible for all shipping charges, including return shipping and any manufacturer restocking fees (usually 25-30%).
- The refund will be processed once the item has been received at the warehouse.
- No returns permitted on any custom-built, or made to order items, such as TK Kennels or any other custom built items.
- Custom build items may not be canceled once in production--all sales for custom products are final
For those items that are non-returnable but arrive damaged, we will promptly provide a replacement at absolutely no cost to you pursuant to our Shipping & Returns Policy.
Because we cannot sell used items, all returned items must be in new and unused condition, including original packaging (please do not assemble or modify the product in any way).
CUSTOM LENGTH, CUSTOM DESIGN, OR CUSTOM BUILD KENNELS AND ITEMS MAY NOT BE CANCELED OR ALTERED ONCE IN PRODUCTION. THESE ARE NOT STOCK ITEMS, ARE NON-REFUNDABLE, AND ARE BUILT EXPRESSLY FOR YOU, HENCE CANNOT BE RESTOCKED.
Are Credit Card or Shoppay Installment Fees Refundable?
No, they are not. If you cancel an order that we have processed and / or shipped, credit card or Shopify Installment processing fees will be deducted from your refund.
- 2.9% for credit or debit cards
- 5.9% for Shopify Installment plans
Your card or Shopify Installment charge us these non-refundable fees, which we simply pass onto you should you decide to cancel an order.
Shipping Insurance
Dens & Kennels provides complimentary shipping insurance with all orders; we want your purchase to be fully insured and protected while in transit. Shipping insurance allows a merchant to replace or refund an order that suffers damage due to shipping, at no cost to the buyer.
By accepting a damaged box and signing for it in "good condition", however, a customer acknowledge they wish to receive the order as is and cancel the right to any refund or replacement. Any box visibly damaged during shipping may indicate a damaged item within. This means a customer should always notate the damage to a box or item on the delivery bill, otherwise insurance cannot be filed and refunds/replacements cannot be made. We know this is pretty straight-forward, but we are required to disclose it! :)
We strive for your 100% satisfaction. In the event we process an insurance claim for damage, please bear in mind that we will always provide a refund or replacement without you having to wait for the claim process to be over. In doing so, however, you agree to hold onto the damaged item until the claim process is over. Refusal to warehouse the damaged item means shipping insurance cannot be executed and voids the ability to provide refunds/replacements. This is common practice with all U.S. carriers (UPS, Fedex, etc) when processing insurance claims for refunds or replacements and does not in any way make you responsible for the delivery damage.
If you have any questions at all, please contact us a 407-347-2363 or at support@densandkennels.com and our professional staff will be glad to assist you.
Delivery Method--VERY IMPORTANT
All heavy freight orders are delivered "curbside", which is industry standard for all manufacturers. The shipping company will call you ahead of time to schedule a delivery appointment, and deliver curbside via freight truck. All smaller/lighter orders are delivered via regular Fedex/UPS.
If you choose another type of delivery (such as Front Door Delivery), please retain the email confirming any alternate delivery method for your records. For your protection and peace of mind, any guarantee is only provided in writing and never verbally.
It is important to note that some deliveries may incur additional costs due to remote / hard to access / limited access locations. Although rare, we will promptly let you know if this is the case so that you may choose whether or not to proceed with the shipment.
ONCE A DELIVERY METHOD IS CHOSEN DURING CHECKOUT, IT IS IMPORTANT TO LET US KNOW BEFORE SHIPPING IF YOU WISH TO CHANGE METHODS AS NOT ALL SHIPPING COMPANIES PROVIDE ADDITIONAL SHIPPING SERVICES, SUCH AS LIFTGATE, FRONT DOOR, OR WHITE GLOVE. THIS IS VERY IMPORTANT AS IT WILL SUBJECT YOU TO SHIPPING AND RESTOCKING CHARGES IF YOU CHOOSE NOT TO ACCEPT DELIVERY OR ARE UNABLE TO DO SO.
Storage Fees & Delays
It is understood that by placing an order you are ready to accept immediate delivery of the merchandise. Should you need the merchandise to arrive on a specific date, this date must be relayed before your order ships.
If your order ships and you choose to delay delivery, the shipping company unfortunately reserves the right by law to return your merchandise to the manufacturer, or charge you storage fees. Generally, shipping companies will not allow your item to be stored on premises--for insurances reasons--for longer than 3-5 business days.
- If they return your merchandise to the manufacturer, you will be responsible for shipping both ways, as well as a restocking fee.
- If the merchandise is non-returnable and gets returned to the manufacturer (who thus refuses it), you will be responsible for the full cost of the item, including any third party and shipping fees.
- If the shipping company chooses to retain the item on premises and charge you shipping fees, you agree to pay such fees in full prior to the delivery of the merchandise.
In essence, please do not delay delivery of the merchandise, as shipping companies have very little flexibility due to legal and insurance restraints. You will be responsible for all costs associated with self-imposed delays.
Freight Issues & Delivery Times
We will always do our best to ensure prompt delivery of your merchandise. However, freight delays may occur due to a carrier dock delay (Fedex, UPS, etc), carrier item loss, inclement weather, and many factors beyond our control.
We realize this is an inconvenience for you, however it is not grounds for cancellation. Freight issues may happen with any freight from any company across any state. You agree to allow the freight company to rectify the issue.
- Freight shipping is unlike regular shipping
- Freight delivery times are never guaranteed--even among the largest freighters--nor will we ever guarantee delivery on or by a certain date
- We may give you approximate delivery time frames, but never guarantees
- Freight companies may lose or misplace your item. This is rare and only affects a small minority of shipments across all freight companies.
In such event that an item is lost or delayed, you agree to allow the freight company and us to rectify the issue. We realize you want your item as fast as possible, but understand we also want to deliver your item as quickly as possible and we understand it isn't a perfect world and freight issues may arise.
IN THE RARE EVENT A CARRIER ISSUE OCCURS, WE WILL ALWAYS STRIVE TO RESOLVE MATTERS RAPIDLY FOR YOU. HOWEVER, SHOULD YOU WISH TO CANCEL AN ORDER REGARDLESS, WITHOUT GIVING THE FREIGHT COMPANY TIME TO RECTIFY THE ISSUE, IT WILL BE CONSIDERED A REGULAR CANCELATION AND HENCE FALL UNDER THE CANCELATION POLICY IE. YOU WILL BE RESPONSIBLE FOR SHIPPING COSTS BOTH WAYS AND MERCHANDISE RESTOCKING FEES.
Does delivery include setup?
Since the standard delivery method is curbside, it does not include set up. Oftentimes customers don't realize professional setup can exceed $1,000 in cost through freight companies. Hence, if you require professional setup, we recommend you find a local installer near you and negotiate their rate to save you money.
What is Front Door/Garage Delivery?
When this service is requested on a shipment going to a business, the carrier will take the freight into the storefront for delivery. On a residential delivery, the carrier will take the shipment onto the property, or into the garage of the residence. They will not necessarily deliver inside the front door, but rather at the front door. Please note this is the case with any shipment from any company and is a carrier policy, not our own.
When a driver delivers to a specific room in a house or business (for example a basement or 2nd floor), the requested service is known as White Glove service. Since this is very time consuming, only specific shipping companies offer white glove service. If you require white glove service, please let us know.
Not all white glove quotes will be the same, since not all home deliveries are the same. Number of stairs, corridors, etc may require a different quote and we will let you know if this is the case.
Color Disclaimer
All items purchased are represented on our site in as best a color scheme/description as possible, based on information relayed to us by the manufacturer. Colors, however, may vary slightly from what is shown based on the type and age of monitor the items are viewed on.
The item name and color is no different on our site than on any other site, and you agree to purchase the item based on appearance as shown and described.
No manufacturer allows returns based on colors; this holds true for any custom built items as well.
Blanket Policy Disclaimer
For any policy omission or clarification, the individual manufacturer policy will apply without exception. As policies are multi-faceted and constantly evolve, customer (you) and retailer (us) agree to defer to the manufacturer's shipping & returns policy in these instances.
Is Free Shipping offered everywhere in the US?
Much as we strive to offer absolutely free shipping during our promotional periods, there are some locations where we cannot offer free shipping. These are usually states such as Hawaii and Alaska, but not limited to these, as well as locations with restricted access (ie islands, heavy metro areas, hotels), rural areas, or locations which a carrier may deem remote or difficult to get to. Coast-to-coast shipping may not be covered under our free shipping policy, as we strive to obtain the fastest route to prevent item breakage and deliver exceptional customer satisfaction.
*Any Lucky Dog/Rhino Kennel deliveries to NY or FL ARE considered distance shipping, as the suppliers are located in Oregon and California, and we will ONLY use premium carriers to ship there to prevent the high likelihood of damage. Distance shipping is not limited to NY or FL.
If you feel you are in such a location, please feel free to contact us to make sure. We will still provide a credit for shipping in these instances. If you place an order and we find that you are in such an area, we will immediately contact you with all available options.
Thanks so much for choosing Dens & Kennels!
Dens & Kennels guarantees the lowest price for an entire 6 months after purchase on all items!
For New Orders:
If you haven't purchased from us yet, you have two options to get the best price guarantee:
1. If you see the item on our website, order it today and we will guarantee it is the best price anywhere online for an entire six months after purchase. If not, we'll refund you the difference!
2. If you can't find the item you are looking for, or you want options or other custom additions not listed, call or email us at support@densandkennels.com and we will put together the lowest price quote you will find anywhere online, guaranteed.
Just email us at support@densandkennels.com with your Purchase Order Number after you purchase.
Our 100% Price Guarantees terms and conditions:
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The price guarantee is valid for up to an entire 6 months after purchase!
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Please purchase the item from us before requesting your Price Match
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Clearance or Special Promos, such as buy one get one free aren't eligible
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The item be in stock on the competitor's website
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The price match applies to online-only retailer ie. Costco isn't eligible
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Auctions or any kind of liquidator sites such as Overstock or eBay aren't eligible
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The competitor must be an authorized dealer and follow dealer MAP Policies
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The guarantee includes the total price of both item and shipping charges
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QuadPay or TimePayment transactions are not eligible
Feel comfortable knowing that you are paying the best price for all purchases on DensandKennels.com - Place your order today and leave the rest to us!
Contact us today at support@densandkennels.com.


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