CAT MATE Wall Liner -

Cat Mate Wall Liner

By Cat Mate
Rated 3.6364 out of 5 stars
$13.99Chewy Price
$15.99Chewy Price

In Stock
FREE 1-3 day shipping over $49

About This Item


  • Extender to bridge the gap between both sections of a Cat Mate Cat Flap when installed in a thick wall.
  • Can be painted to match any existing wall color.
  • Add more than one wall liner for a customized length.
  • Easy to install in the wall and attach to the pet door for a stress-free process.
  • Removes easily if you decide to change the location of the pet door.

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Questions & Answers

8 Customer Questions

which cat mate wall liner fits the 4-way door, item no. 75283?
Answer by ChewyAug 27, 2020
This liner is compatible with Cat Mate’s Lockable Cat Flap, Lockable Cat Flap/Door with Door Liner, 4-Way Locking Cat Flap, 4-Way Locking Cat Flap with Door Liner, and 4-Way Locking Cat Flap with Door Liner.

Can the Cat Mate Wall Liner be used alone, without a cat door/flap, as a portal from one room to another? I want my cats to have access to two bedrooms and don't need cat flap to close them out.
Answer by ChewyOct 20, 2018
The wall liner is not designed to be used without attaching it to the Cat Mate Lockable Cat Flap/Door with Door Liner or Cat Mate 4-Way Locking Cat Flap with Door Liner.

How many of these will I need for a 4” wall if I buy the cat door with the liner?
Answer by ChewyDec 24, 2018
If the thickness of the wall is 2 - 4 inches you will need 1 Cat Mate Wall Liner. If the thickness of the wall is 4 - 6 inches you will need 2 Cat Mate Wall Liners.

Is this wall liner compatible with Cat Mate Large Cat Flap 221W? If not which item is?
Answer by ChewyApr 23, 2020
Cat Mate do not currently produce a wall liner for the 221W, 221B, or 221WD. In the installation guide they do have instructions for using plywood or other rigid building material to create a frame within the wall to attach the door directly to, as this provides a sturdier installation that is better suited for use by larger cats and small dogs.

ReviewsWrite a Review

Rated 3.6364 out of 5 stars
22 Ratings
Would recommend to a friend

22 Customer Reviews

Rated 3 out of 5 stars
By Lani on Feb 27, 2023

Do not need

After receiving this item along with the cat door, we discovered the cat door is too small. I purchased 2 doors and was able to give one away. this wall liner is not needed. I am looking for a way to return it.

Rated 2 out of 5 stars
By Catdoor on Oct 30, 2021

Didn’t fit

Even though it was recommended with the cat door I purchased, it did not fit. I’ll be returning it.

Rated 3 out of 5 stars
By great on Nov 13, 2021

too small for my cats

Too small for my cats. just got it and need to return it.

Rated 5 out of 5 stars
By Phil on Jun 19, 2021

Cat door extension for extra thick walls.

These are a must if you are dealing with an extra thick wall. My wall was approximately 8 inches thick and they worked perfectly. They locked together securely and seem to be of good quality and reasonably priced.

Rated 5 out of 5 stars
By Laura on Dec 27, 2020

Bought them again

I used them to convert a deck storage container into a cat house. My strays love it. Then two more strays had been coming around stealing their home so I made another home for them.

Rated 1 out of 5 stars
By BenMar on Nov 21, 2020

Oops Wrong one

Wrong liner for our Micro chip door. Found this out after We received the new door. Could not find the correct liner to fit.

Rated 3 out of 5 stars
By Lennie on Aug 26, 2020

Not as marketed on the site

I was purchasing The cat-mate-large-catsmall-dog-4-way .... and when I was purchasing that item chewy suggested this item. However, the door I bought has a liner and this liner is too small for that door anyway... so their algorithms need to get better at their job and not suggest things that really don't go together.

Rated 3 out of 5 stars
By catsinmaine on Sep 12, 2020

For use with CatMate products ref # 234 and 235

I bought this thinking it would work with the CatMate Large Cat Flap, ref: 221 W. It did not.

Rated 3 out of 5 stars
By Cherryl on Dec 29, 2019

I cannot use

I really cannot rate this item or the kitty door I purchased to go with it. It is going to be too small for the larger cats. I do not suggest this size if you have large cats. I care for a lot of kitties and I do not even know what is normal any more but there are some 20 pound cats that are too wide for the door that goes with this extension item and also, I purchased this extension item because I could not tell if one came with the door it goes to but one did arrive with the actual door and I was not going to be able to use this one, even if the actual door would fit the cats.

Rated 5 out of 5 stars
By Suzy on Oct 4, 2019

kitty tunnel

The three segments required to fit thru my thick wall to our garage fit perfectly. I especially appreciated the scribing lines so I could make a square cut with my hacksaw. The tunnel made a very professional installation with the Cat Mate pet door I also ordered.