Magflap® MK3 | Horizontal Letterbox Draught Excluder
Magflap® MK3 | Horizontal Letterbox Draught Excluder
Further Details
Further Details
✅ Engineered All-Steel Construction — Durable, rust-resistant build with a sleek powder-coated finish
✅ Horizontal Design — Fits standard UK letterboxes (ideal for retrofits or new builds)
✅ Zero-Brush Design — Uses precision magnets to create a clean, silent seal — no more frayed bristles
✅ 99% Recyclable — Made with sustainable materials for eco-conscious homes
✅ Strong Magnetic Closure — Resists wind pressure and improves thermal performance
✅ Easy Self-Fit — Install in under 10 minutes using our guide (no special tools required)
✅ Compatible Surfaces — Works on wood, uPVC, metal, and composite doors
✅ Lockable Option Available — Internal Locking Keyset prevents tampering and fishing
✅ Made in the UK — Family-run business since 2009, handmade in small batches for quality
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- Family Owned
- Free Returns
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EASY USE
Versatile Installation
Can be fitted internally or externally, offering flexibility for various door types. Can be fitted by you or a trusted installer, see our guide below.

Proven Thermal Technology
Whether you are in a hot climate keeping the cold in or a cold climate keeping the heat in, the Magflap MK3 is thermally effective

FUSS FREE
Brushless Design
All of our products are brushless. Our perfectly balanced Magman strength magnets eliminates the need for bristles, ensuring a smoother, longer-lasting performance.

The Iconic
Magman® Seal
A strong magnetic seal ensures no gaps for air to seep through, preventing draughts all year round.

carefully crafted for over 15 years
Family Owned
Our mission is to restore the brilliance of British craftsmanship.

3 Year Warranty
Not only does our product come with a 3 year warranty, if you move house and remove your Magflap you can send it back to us to be refurbished ready to install at your new home.

Proudly
Made in the UK
Proudly manufactured to the highest standards of quality not just in our products but our service too.

Eco freindly
Cork Gaskets
Made with cork gaskets to reduce plastic use and provide a more eco-friendly solution.
Great product to cover a larger than standard letter box opening. I needed to use longer screws than provided to ensure secure attachment but other than that it was easy to instal with the help of an extra pair of hands. I am delighted with the results and look forward to a less draughty hallway this winter!
I love the simple design and use of cork and magnets to ensure it is draft proof. Also good to support UK manufacturing
Has really cut out the draft through our letterbox. Very happy with it.
Easy to install. Seems really good quality. Very pleased
Finally, a letterbox cover that seals shut. A good design, sleek and simple to fit. Thank you.