White fire-retardant letterbox bag, cut away to show post inside, with a zip along the bottom
Fire-retardant letterbox bag dimensions and features
Three types of doors: Timber, Composite, and uPVC, with text indicating suitability for different door types.
Measurement guide for a letterbox bag with clear instructions on width and height.
Product demonstration with text highlighting its features for accepting bulky items, containing fireworks, preventing burglars, and protecting from pets.
Fitting instructions for a door installation template on a white background
White fire-retardant letterbox bag, cut away to show post inside, with a zip along the bottom
Fire-retardant letterbox bag dimensions and features
Three types of doors: Timber, Composite, and uPVC, with text indicating suitability for different door types.
Measurement guide for a letterbox bag with clear instructions on width and height.
Product demonstration with text highlighting its features for accepting bulky items, containing fireworks, preventing burglars, and protecting from pets.
Fitting instructions for a door installation template on a white background
Home Secure

Fire Proof Retardant Letterbox Bag. Internal Letter Box Security Cover – uPVC & Composite DoorsFire Proof Retardant Letterbox Bag. Internal Letter Box Security Cover

£99.99 SKU: HS3066
Colour: White
£99.99
Colour: White
Order by 2pm for same-day dispatch
Eye visibility icon in black, representing monitoring, visibility, or visual deterrence, displayed on a transparent background.

Same-day dispatch on orders before 2pm

Fully tracked 2 working-day courier

Will it fit your door?
  • Fits inside your door, behind the letterbox - uPVC, composite and timber doors.
  • Fixings provided. Fits in minutes with simple tools, and can be removed and reused.
  • The fitting template opening is 315 × 80mm. If your letterbox opening is bigger, call us on 0151 521 8089 before ordering.
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Frequently Asked Questions

A bag that fits on the inside of your door, behind the letterbox. Post drops into the bag instead of onto the floor, and the self-extinguishing fabric can contain small fires and fireworks pushed through the letterbox.

Yes. The double zip pulls can be locked together with a small padlock, and the steel plate lets you lock the letterbox closed when you need to.

Tape the template centrally over the letterbox on the inside of the door and mark the 4 screw holes. Drill small pilot holes, screw the 4 supplied screws in halfway, hang the frame on them by its keyhole slots, then open the zip and the metal flap and tighten the screws. It can be taken off and refitted to another door.

It suits uPVC, composite and timber doors. It fixes to the inside face of the door with 4 screws. The fitting template has a 315 x 80mm opening, which goes centrally over your letterbox. If your letterbox opening is larger than that, call us on 0151 521 8089 before ordering.

White or brown. Both are the same size and fit the same way.
Home Secure fire retardant letterbox bag fitted inside a white front door, for arson and firework protection. Fire retardant, protects against anti-social behaviour, improves home security. Also shown: Four features of the fire retardant letterbox bag: fire-retardant fabric, protection from anti-social behaviour, mail kept out of reach, large capacity for post and parcels.Home Secure fire retardant letterbox bag fitted inside a white front door, for arson and firework protection. Fire retardant, protects against anti-social behaviour, improves home security.
Four features of the fire retardant letterbox bag: fire-retardant fabric, protection from anti-social behaviour, mail kept out of reach, large capacity for post and parcels.
Fire retardant letterbox bag with the zip open and post inside. Stops letterbox arson, stops theft and fishing, improves home security.Fire retardant letterbox bag with the zip open and post inside. Stops letterbox arson, stops theft and fishing, improves home security.
Quick and simple internal installation: easily fitted to most door types using the supplied fixings, installs in minutes with basic tools and can be removed or reused.Quick and simple internal installation: easily fitted to most door types using the supplied fixings, installs in minutes with basic tools and can be removed or reused.
Fire-retardant fabric, letterbox security and easy installation. Designed for households, landlords and housing providers who need protection from letterbox attacks.Fire-retardant fabric, letterbox security and easy installation. Designed for households, landlords and housing providers who need protection from letterbox attacks.
Make your home secure: a lit firework being pushed through a letterbox, and keys being fished through a letterbox with a hook. The risks a fire retardant letterbox bag prevents.Make your home secure: a lit firework being pushed through a letterbox, and keys being fished through a letterbox with a hook. The risks a fire retardant letterbox bag prevents.
Home Secure, The Security Specialists. Trusted by thousands of UK customers for practical, dependable security solutions designed for everyday use.Home Secure, The Security Specialists. Trusted by thousands of UK customers for practical, dependable security solutions designed for everyday use.
Product overview

A fire-retardant letterbox bag that fits on the inside of your door, behind the letterbox. Post drops into the bag instead of onto the floor, and its self-extinguishing fabric can contain small fires and fireworks pushed through the letterbox. It's our best-selling letterbox security product.

Why fit a letterbox bag?

  • Anti-arson: the special fire-retardant, self-extinguishing fabric can contain small fires.
  • Anti-social behaviour: contains fireworks and small fires pushed through the letterbox.
  • Stops letterbox fishing: the bag covers the inside of the letterbox, making it harder to reach keys or the inside handle.
  • Keeps post out of sight: post isn't left on the floor, where it shows burglars no one is in.
  • Protects your post: the mailbag can be secured with a padlock to prevent unauthorised access, helping protect against identity fraud and theft from the post. The letterbox can also be locked closed when required.
  • Huge capacity: takes bulky items such as newspapers and magazines, so post isn't bent or left outside.

Fitting

Fixings are provided. It fits in minutes to almost any door, including uPVC, composite and timber, using simple tools, and can be removed and reused. Check the measurement guide in the images before you order.

  • Colours: white or brown
  • Product EAN: 5060013708329

More letterbox security

For a lockable steel cover, see the FlapGUARD. Two sash jammers on the inside flap make a simple letterbox lock. Read our guide on how to prevent letterbox burglary.
Delivery & Returns

How much is delivery?

UK Mainland Delivery is £2.99 on all items no matter how many you order!

Northern Ireland, Scottish Highlands, Channel Islands £6.00.

We do not offer International Delivery (Ireland, France, Spain etc).

When will my order be dispatched?

Orders before 2pm (Monday to Friday) are usually dispatched same day but may take up to 24 hours.

When will I receive my item?

We ship on 2 working day courier. Fully Tracked. Tracking will be emailed on dispatch.

Special order items such as keyed alike locks will take longer to dispatch. Please refer to product description for lead times.

I haven't received my item?

Please email us your name, order number and date of purchase.

We prefer email as it allows us time to research and respond.

Returns Information

We operate a 30 day refunds and return policy.

If you change your mind you must return the product back to us within 30 days of delivery

Please include a copy of your invoice and a note stating reason for return.

Additional keys, locks keyed alike or built to code are non refundable as they are personalised made to order goods.

Any refund, which is due to a fault or other defect, will include a refund of the applicable delivery charges otherwise not.

It is the buyers responsibility to arrange the return of goods to us. We do not offer a collection service for returning items.

Items must be returned including original product packaging and accessories.

We reserve the right to refuse any returns that do not comply with this policy.

Please post returns to the following address:

Home Secure (Online)

Unit 5, Brookfield Drive

Liverpool, L9 7AJ

United Kingdom