MaxSeal PRO In-Glass Pet Door

$219.99 - $733.99
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MaxSeal® PRO IN-Glass Pet Door

Through the Glass Dog Door | Pet Door Model

MaxSeal® PRO In Glass dog door MaxSeal Pro dog door for door installation

Security Boss Manufacturing LLC® is proud to introduce the MaxSeal® PRO In-Glass pet door for sliding glass doors and full panel glass doors. This model features Ultimate security with our new 1" thick metal insulated security panel. The flaps of this door utilize newly designed rust resistant hinge connections that results in your flaps lasting much longer. These hinges alleviate the pinch point of taller dogs as well as excess wear due to multiple pets using the door. All Security Boss products are hand built to order.

Single Flap versus Dual Flap Information Choose from 10 different sizes and 10 different frame color options. You can even order your interior frame a different color from your exterior frame at no additional charge. You may also choose between the single or dual flap version. The dual flap model will provide a superior weather barrier to the outside, where the single flap version can be used in very temperate climates. You can maintain all components on the MaxSeal® PRO doors so that you will never need to buy or replace the pet door. You can always keep your dog door functioning perfectly for the life of your pet! Security Boss builds your door as ordered so that you can choose from the greatest variety of options and features.

Note: Light Ivory has been discontinued.

The exterior frame of the In-Glass MaxSeal® Pro Pet Door is a specially made with a very low profile design that allows your sliding door to glide past the exterior frame of the pet door.

A specialized adapter is included to allow proper fitting on all glass thickness and types.


Using 1" Adapter
Using 1/2" Adapter
Fits glass 1/4" to 13/16" thick
Fits glass 7/8" to 1 1/2" thick
Special Ranges: Single Flap In-Glass models can fit 1/8" & 3/16" glass thickness enter glass thickness when ordering & select 1" adapter

Important Ordering Information
1. You will need to select the correct adapter for your glass thickness
2. We include Filler Blocks that help locate the pet door in the glass notch.
(Providing us with the glass thickness ensures you receive the correct filler blocks)

If you are unsure how to order the correct IN-Glass pet door we highly recommend calling a glass professional in your area. They typically will come out to your house to take needed measurements so that you can place your order or if you prefer simply contact on of our listed IN-Glass installers and they can handle the entire process for you.

MaxSeal® PRO
In-Glass Pet Doors

Pet Opening
Flap Size
Notch in Glass Required
width x height
Single Flap
Dual Flap
6" x 7.5"
9 5/8" x 10 13/16" $219.99 $252.99
7" x 9"
10 5/8" x 12 5/16" $250.99 $294.99
9" x 12"
12 5/8" x 15 5/16" $299.99 $337.99
11" x 16"
14 5/8" x 19 5/16" $352.99 $411.99
11" x 20"
14 5/8" x 23 5/16" $402.99 $470.99
Tall Grand
11" x 25"
14 5/8" x 28 5/16" $459.99 $517.99
XL Grand
12" x 24"
15 5/8" x 27 5/16" $516.99 $591.99
Wide Tall
15" x 20"
18 5/8" x 23 5/16" $552.99 $627.99
15" x 24"
18 5/8" x 27 5/16" $584.99 $670.99
15 3/4" x 32"
19 3/8" x 35 5/16" $650.99 $733.99
Doors are refundable within 30 days of receipt by customer
No restocking fees

Security Boss Pet Doors - In Glass Pet Door
Pricing starts at: $219.99
Complete pricing chart at bottom of this page

Security Boss® In-the-Glass Pet Doors

Installation Guidelines

Security Boss ® In-the-Glass Model Pet Door should only be installed by a professional in the glass industry. Security Boss® does not guarantee any installation of our pet doors. The uniqueness of the installation situation make it imperative that you work only with professionals that have experience and are bonded. As the manufacturer of the In-the-Glass Model Pet Door, we warranty the pet door only, not the medium that it is installed.

Through the glass pet door installation for sliding glass doors

Overview - Basic guidelines for installing a MaxSeal Pet Door ® in Sliding Glass Doors.

Please note that there are many types of sliding glass doors. This guide is to be used for "standard" type sliding glass doors*. The installation process involves replacing an existing Insulated Glass (IG) Unit with a new "custom" IG unit that will be "notched" or cut in one of the bottom corners where the MaxSeal Pet Door® will be installed. Once installed, the sliding glass door will operate as intended with full sliding functionality and use of the existing door lock.

*Standard - the glass goes into the molding of the door by 1/2 inch (glass is covered by 1/2 inch of molding). This will not be the same for all doors because of glass door make, model, material and molding variables. Objectives:

1. Glass Measure
2. MaxSeal Pet Door® Installation
3. Remove existing Insulated Glass (IG) Unit
4. Install a new IG Unit
5. Install MaxSeal Pet Door

Glass Measure - (On Site with Customer - ALWAYS)

Tools Needed
-glass check tool
-tape measure
-putty knives or 5 way tool

1. Determine what pane of glass to install the pet door

2. Determine what side of the chosen pane (right/left) to install the pet door

3. Measure the actual glass width and height

4. Measure total glass thickness (glass check tool)

In-the-Glass Pet Door Installation

5. Determine if IG unit has tint or LOW-E (glass check tool)

6. Determine the type of ADAPTER (this is in the IG unit and used to mold the two panes of glass together to form the IG unit)

7. Determine the size of Pet Door needed based on the pet size and the distance from the bottom pet door flap to floor.
(Note: A correct pet opening will be large enough to clear the shoulders of the largest pet using the door. Remember the pet door will rest on the bottom frame of the sliding door).

Sizing Example: If your pet is 21 inches tall to the shoulder and there is a 3 inch distance from the floor to the bottom of the pet door flap then the top pet door flap will be at a height of 24 inches. Take this into account when choosing your size pet door. In this instance we could use the TALL Pet Door 11x20 because of the 3 inch gain.

8. Determine "notch" dimensions based on the pet door size (Notch - when a new IG unit is ordered you must include the cut out (notch) measurements for the glass fabrication.
For "Standard" sliding glass door applications - add 1/4 inch to the tip-to-tip measure of the MaxSeal Pet Door for rough cut (glass notch).

Example: For the TALL door (11x20) Exterior Frame (14 3/8" x 23 1/16")
add 1/4 inch for the notch dimension (14 5/8" x 23 5/16")

Pet Door


Notch Dimension
in Glass

6" x 7.5"
9 5/8" x 10 13/16"
7" x 9"
10 5/8" x 12 5/16"
9" x 12"
12 5/8" x 15 5/16"
11" x 16"
14 5/8" x 19 5/16"
11" x 20"
14 5/8" x 23 5/16"
Tall Grand
11" x 25"
14 5/8" x 28 5/16"
XL Grand
12" x 24"
15 5/8" x 27 5/16"
Wide Tall
15" x 20"
18 5/8" x 23 5/16"
15" x 24"
18 5/8" x 27 5/16"
15 3/4" x 32"
19 3/8" x 35 5/16"

9. Order new IG unit from local glass fabrication company based on actual glass measurements, total glass width, notch measurements, adapter type, Low-E and tint requirements.

NOTE:When IG Unit fabrication is complete (5-10 days) you are ready to install.

MaxSeal Pet Door Installation

Razor knife
putty knives
drop cloths
5 Way Tool
reciprocating saw
silicone sealant
Phillips & Standard screwdrivers

1. Depending on the type of slider, you may have to remove the panel from the door frame (locate and take out plastic stoppers) and lift the panel out or you may be able to remove the IG Unit without lifting the panel out.

In-the-Glass Pet Door Installation

Figure 1: Panel removed from the door frame

2. Locate the removable molding (may be on the inside or outside of panel) and remove from all sides. Typically you can loosen the molding with a putty knife / 5 Way tool by sliding the tool under the molding or between the molding and door frame. Twist with caution not to damage the molding, as you will reuse this for the new IG Unit. Once loosened, pry the molding off.

In-the-Glass Pet Door Installation

Figure 2: Molding removed

3. Remove the IG Unit - Once the molding is out, the IG Unit is held into place by silicone on the opposite side of the molding. Use a putty knife to pry between the IG Unit and the panel frame all the way around the IG Unit to break the silicon seal in order to remove the IG Unit.

In-the-Glass Pet Door Installation

Figure 3: IG Unit removed from the door panel

4. Install new IG Unit into the door panel - use silicone sealant and apply only on surface of panel that the new IG Unit will have contact with.

In-the-Glass Pet Door Installation

Figure 4: New IG Unit installed in door panel

5. Install the removed molding on all sides

In-the-Glass Pet Door Installation

Figure 5: Molding installed

6. Install "IN FILL BARS" into the gaps where the IG Unit does not make contact with the panel frame. The IN FILL BARS will be the same total thickness of IG unit (i.e. 1 inch) by desired length. These are cut on site.

In-the-Glass Pet Door Installation

Figure 6: IN FILL BARS cut to length

7. Install IN FILL BARS to panel frame with silicone sealant

In-the-Glass Pet Door Installation

Figure 7: IN FILL BARS installed

8. Put the interior pet door frame (the one with the insulated security panel) into the rough opening in the "people" door. Notice the clearance between the pet door interior frame and the glass on the IG Unit. This gap is necessary as the edges of the IG Units are extremely fragile and will break if the metal from the door comes into contact with the glass.

In-the-Glass Pet Door Installation

Figure 8: Gap clearance between the pet door and the glass

9. Snap the outside frame into the MaxSeal door and sleeve the pet door frame together. 10. Using the pre-drilled pilot holes and supplied drill bit and insert one screw. Make sure the door is level. When level, tighten the inserted screw. Affix the remaining screws into place using the pilot holes as guides.

(Security Boss Manufacturing LLC has included One-Way Security Screws as well as Phillips head screws to give customers a Tamper-proof option in their door installation)

Important Note: Use a short screw (5/8 inch) for the pilot hole on the glass side to prevent the screw from hitting the glass!! Standard screws can be used for the remaining pilot holes.

In-the-Glass Pet Door Installation

Figure 9: MaxSeal Pet Door installed into door frame

11. Once the pet door is installed you can fill any gaps and seal the edges with silicone sealant.
12. Install the door panel into the door frame, ask the customer not to use the pet door for 2 hours to allow the silicone to set.

In-the-Glass Pet Door Installation

Figure 10: Panel installed in frame

13. Your slider will open and close as designed with the pet door installed

In-the-Glass Pet Door Installation

Figure 11: Open slider with the pet door

Manufacturers Note: The MaxSeal In-the-Glass Model Pet Door is designed to be installed by professional glass glaziers that have experience installing pet doors into glass. For this reason, this product is only sold under the assumption that a professional will be installing this product. It is NOT designed for the homeowner, handyman or building contractor to install.

If you are interested in learning more about partnering with Security Boss as an Installer, please contact us at Installer / Retail Program