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Very happy with the quality of the product and finish. Packed extremely well so arrived in perfect condition. First time customer. Would use again without question.
Gary Kreeger,
2 hours ago
Verified
Easy to install i would use them again
Easy to install i would use them again
Teah,
5 hours ago
Excellent communication!
I recently ordered a cut item and didn't have a good experience with the delivery company at our end. However, after contacting the company, by email, my problem was resolved immediately. The staff responded in an extremely professional and empathetic manner, giving me an option to replace or refund the item. I will definitely be using them again.
Carole,
9 hours ago
Verified
Good price
Good price, good service, very well packed, and delivered on time, will use again
Jon Oneill,
9 hours ago
Verified
Excellent product
Excellent product, easy to order online. Competitive prices.
Netty,
10 hours ago
Verified
Advice on website allowed me to select…
Advice on website allowed me to select correct perspex for my project.
Cut to size according to my measurements.
Delivered by a very helpful driver in their own van.
John M,
10 hours ago
Verified
Straight forward way to order wood cut…
Straight forward way to order wood cut to size.
Pricing is where I would expect for be-spoke cutting to size.
Delivery was a few days out on what was scheduled but this does not distract from the fact that the sizes are correct and delivered undamaged.
Mr Hitchcox,
12 hours ago
Verified
Great quality & service
Great quality, perfect desktop for my studio. Packaged extremely well & delivery service by APC was very quick.
Lucy,
11 hours ago
Verified
great service
great service
graham syres,
11 hours ago
Verified
Great product
Great product. Quick delivery and very well packaged
Natalie Law,
12 hours ago
Verified
This is a great company
This is a great company, the web site makes it easy to order exactly what I needed. Item was shipped well protected.
Item came, as requested, a faultless process.
Overall a great service.
Andy Burgess,
12 hours ago
Verified
Very impressed with glass-look table top replacement
Great quality product, cut and delivered very quickly for a reasonable price. We liked how everything was customisable so we could get the top made to our exact specifications for a perfect fit. The end result looks good and has rescued a table we thought would be unusable after we broke the original glass top - thank you, we would use again without hesitation!
Leanne,
14 hours ago
Verified
Quality of product excellent
Quality of product excellent. Delivery took much longer than expected but did receive a refund of courier charges.
TRACY THOMPSON,
18 hours ago
Verified
Exactly what I wanted
Ordering was straightforward on the website. My stuff arrived when they said it would and was well packed.
Hard to tell it isn’t glass but obviously it is much lighter, so perfect for what I want.
HS,
1 day ago
Verified
Excellent service and a good price
Excellent service and a good price
Mr Chell,
1 day ago
Verified
Easy to order
Easy to order, got what I asked for
Mr Brian Loy,
1 day ago
Verified
Very easy to do and the product was…
Very easy to do and the product was great
Marianne Browning,
1 day ago
Verified
We dealt with Ricardo over a slight…
We dealt with Ricardo over a slight issue we had with the magnetic tape. He resolved the issue speedily and dealt with the query extremely well. Very good experience all round
David Brett,
1 day ago
Verified
Brilliant and love the product.
Brilliant and love the product.
Simon Clare,
1 day ago
Verified
Quick service; useful website
I was able to order a number of shapes to acrylic to be cut for a greenhouse. There was one shape (basic house shape; rectangle with triangle on top) which couldn't be configured, so wasn't ordered, but other than this, all was good.
Say goodbye to inefficient cooling with our premium custom-cut acrylic window seal. We offer either a crystal-clear 4mm acrylic sheet or a 5mm opal acrylic sheet to create a perfect seal around your air conditioner hose, keeping hot air outside where it belongs. This precision-cut panel closes gaps around your open window, blocking hot air from entering while allowing your AC’s exhaust hose to vent outdoors.
Made from durable, crystal-clear acrylic, it maintains your view while delivering excellent insulation. Order your custom size to fit any window, complete with a custom cut-out hole to match the size of your AC drain hose.
Ideal for renters and homeowners alike, this reusable window seal is easy to install and remove seasonally. Prevent energy waste, keep your room cooler, and reduce your electricity bills with this effective AC window sealing solution.
How to Order Your AC Unit Window Seal
We offer two acrylic options for your AC unit window seal:
4mm Clear Acrylic – A transparent option that allows maximum light into your room while maintaining a clear view outside. 5mm Opal Acrylic – A privacy-friendly sheet that still lets natural light through but obscures the view for added discretion. Ideal if you want privacy without blocking daylight.
Measure Your Window
1. Measure the open window space (the gap you want to cover). 2. Add 40mm to both the width and the height to allow for the 20mm tape area around each edge.
Example: If your opening is 500mm × 600mm, you will enter 540mm × 640mm as your total size.
Select Cutout for AC Hose
Tick "Yes" to Cutout for AC Hose in the additional options.
Choose the correct shape for your AC hose ducting (Rectangle or Circle).
Enter your hose diameter in millimetres.
You can also adjust the cutout position to match your setup.
Add Hook and Loop Tape
Add the Hook and Loop Tape accessory to secure the sheet to your window frame. Each roll is 5 metres long - choose the quantity based on your total window perimeter.
Derek, one of our customers, used our 5mm opal acrylic sheet cut to size to make a custom air con unit window cover for his bedroom. The opal finish was perfect for blocking early morning sunlight while still letting in a soft glow. He fixed the acrylic to the window frame with tape for an easy, removable fit and added a low-cost sliding panel kit (bought elsewhere) to allow access to the window handle. This simple DIY project keeps cool air in, blocks unwanted light, and creates a modern, tidy appearance — showing just how versatile opal acrylic is for custom AC window seals.
Installation
Prepare the Window
Fully open the window you’ll use with your portable air conditioner.
Clean the frame thoroughly to remove dust, dirt, or moisture.
A clean surface ensures the acrylic panel sits flush and any tape or seals adhere well.
Check Your Panel
Verify the dimensions match your window opening.
Confirm the hose hole is the correct size for your exhaust.
Check that the hole is at a usable height for your AC unit.
Install the Panel
Attach the soft (loop) side of the tape to your window frame along the edges.
Stick the rough (hook) side to the edges of the acrylic panel.
Press the panel firmly into place so the tape bonds securely.
Provides easy, tool-free, removable installation—ideal for renters!
Connect the Exhaust Hose
Insert the AC exhaust hose through the pre-cut hole.
Ensure a snug fit.
Optional - Seal any small gaps with foam or tape for maximum efficiency.
Turn on your AC - all done!
Removal & Storage
To remove, simply detach the exhaust hose.
Gently pull the panel free, especially if using hook-and-loop tape.
Clean and dry before storing flat or upright to prevent scratches.
Frequently Asked Questions
Have a question? You can find answers to commonly asked questions about our products, delivery, returns, cancellations and more on our FAQs page
Alternatively, for help and assistance, you can use our Live Chat or reach out to us via email using the contact form on our Contact Us page.
The skirt type window seal that came with my air con unit, was sent flying out of the window along with my sanity!
So I looked for a better solution and found "Cut My". Great website, I did get a little confused when trying to work out where to have the hole cut but as you can see I think I nailed it. I can still partly lower my electric blind to help block the afternoon sun. Great service, and sanity restored.
Verified, Collected by Cut My
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Delivery Options
For 4mm Clear Acrylic Air Conditioner Window Seal
Sorry, we are unable to deliver to this address. To see our service areas, please read our delivery policy.
If you are going to be in the area and would like to proceed with the purchase for collection, please contact us on 01903 389024 or email [email protected].
Estimated Arrival
Estimated Cost
Collection Options
From BN5 9XR
Estimated Arrival
Estimated Cost
Arrival dates and shipping costs shown above are estimates. See exact dates and costs and select your preferred shipping option during checkout. For more details on delivery speeds, pricing, and location, please view our delivery policy.
