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Intumescent Strips for Fire Doors

Intumescent strips swell when exposed to high temperatures to stop the spread of fire through gaps around fire doors. They are also available with an additional brush seal which stops the spread of cold smoke.

All our fire door seals are available for single and double fire doors, and resist fire for either 30 or 60 minutes (FD30 or FD60 fire doors). The seals can be fitted in either the frame or the door leaf.

 

Rebated Fire Door Seal Kits - 10x4mm - Fire Only - Astroflame

  • For rebated fire doors and frames
  • Non-brush fire only seals (4mm x 10mm)
  • 30 minute fire rating (FD30)
  • 1050mm lengths in packs of 5 (single door) or 8 (double door)
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From: £7.67 inc VAT

£6.39 ex VAT

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Rebated Fire Door Seal Kits - 15x4mm - Fire Only - Astroflame

  • Designed for rebated fire doors and frames
  • Non-brush fire only seals (4mm x 15mm)
  • 30 minute fire rating (FD30)
  • 1050mm lengths in packs of 5 (single door) or 8 (double door)
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From: £8.75 inc VAT

£7.29 ex VAT

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Rebated Fire Door Seal Kits - 20x4mm - Fire Only - Astroflame

  • Non-brush fire only seals (4mm x 20mm)
  • 60 minute fire rating (FD60)
  • 1050mm lengths in packs of 5 (single door) or 8 (double door)
  • For rebated fire doors and frames
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From: £8.87 inc VAT

£7.39 ex VAT

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Rebated Fire Door Seal Kits - 25x4mm - Fire Only - Astroflame

  • Non-brush fire only seals (4mm x 25mm)
  • 60 minute fire rating (FD60)
  • 1050mm lengths in packs of 5 (single door) or 8 (double door)
  • For rebated fire doors and frames
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From: £11.03 inc VAT

£9.19 ex VAT

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Rebated Fire Door Seal Kits - 10x4mm - Fire and Smoke - Astroflame

  • For rebated fire doors and frames
  • Fire and Smoke Seals (4mmx10mm)
  • 30 minutes fire and smoke (FD30)
  • 1050mm lengths in packs of 5 (single door) or 8 (double door)
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4.8 out of 5 stars

From: £11.75 inc VAT

£9.79 ex VAT

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Rebated Fire Door Seal Kits - 15x4mm - Fire and Smoke - Astroflame

  • For rebated fire doors and frames
  • Fire and Smoke Seals (4mmx15mm)
  • 30 minutes fire and smoke protection (FD30)
  • 1050mm lengths in packs of 5 (single door) or 8 (double door)
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4.8 out of 5 stars

From: £11.03 inc VAT

£9.19 ex VAT

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Rebated Fire Door Seal Kits - 20x4mm - Fire and Smoke - Astroflame

  • Fire and smoke seals (4mm x 20mm)
  • 60 minute fire rating (FD60 / FD60S)
  • For rebated fire doors and frames
  • 1050mm lengths in packs of 5 (single door) or 8 (double door)
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From: £12.23 inc VAT

£10.19 ex VAT

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Rebated Fire Door Seal Kits - 25x4mm - Fire and Smoke - Astroflame

  • Fire and smoke seals (4mm x 25mm)
  • For rebated fire doors and frames
  • 1050mm lengths in packs of 5 (single door) or 8 (double door)
  • 60 minute fire rating (FD60 / FD60S)
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From: £17.03 inc VAT

£14.19 ex VAT

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Surface Mounted Drop Down Smoke Seal

  • Suitable for gaps of up to 14mm
  • No rebating necessary - ideal for retrofitting
  • Available in a range of lengths: 330mm - 1030mm
  • Supplied complete with fixing screws
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5 out of 5 stars

From: £43.55 inc VAT

£36.29 ex VAT

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Rebated Drop Down Smoke Seal

  • Suitable for gaps of up to 14mm
  • Lightweight aluminium and PVC construction
  • Available in a range or lengths: 330mm - 1230mm
  • Pre-fitted with fixing screws
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From: £52.07 inc VAT

£43.39 ex VAT

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Astroflame Door Edge Guards - Rounded

  • 30 and 60 minute fire rated versions
  • Impact tested to 200kg at 3.5mph
  • Tested to BS 476-22:1987
5 out of 5 stars

From: £136.79 inc VAT

£113.99 ex VAT

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Astroflame Door Edge Guards - Flat

  • 30 and 60 minute fire rated versions
  • Impact tested to 200kg at 3.5mph
  • Tested to BS 476-22:1987
5 out of 5 stars

From: £136.79 inc VAT

£113.99 ex VAT

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Fire Door Gap Gauge

  • Check your Fire Door installations for compliance
  • Lightweight construction
  • Durable design
  • Easy to use
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4.6 out of 5 stars
1 unit

£3.23 inc VAT

£2.69 ex VAT

10+ units

£2.99 inc VAT

£2.49 ex VAT

100+ units

£2.75 inc VAT

£2.29 ex VAT

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Intumescent Ironmongery Protection for Fire Door Hinges - Astroflame

Intumescent backing material for use when fitting fire rated hinges to your fire doors and frames, sealing any gaps to help prevent the spread of fire and smoke.

  • Dimensions (L x W x D): 100 x 30 x 0.8mm
  • Suitable for use on FD30 and FD60 fire doors
  • Supplied in packs of 6 (single door) or boxes of 300
  • Available with square or rounded corners to match most hinges

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5 out of 5 stars

From: £2.75 inc VAT

£2.29 ex VAT

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What are intumescent strips?

What are intumescent strips?

Fire doors are designed to create a barrier that 'compartmentalises' a section of the premises and prevent smoke and fire from travelling from one part of the building to another. When fire doors are installed, there are always small gaps between the door and the frame that could affect the fire doors ability to prevent the spread of fire and smoke. An intumescent strip is a heat activated seal that is placed on the edge of the door or frame to fill this gap when a fire breaks out.

How intumescent strips work

How intumescent strips work

Intumescent strips contain a chemical that swells up when exposed to heat. The strips usually activate when they reach a temperature of around 200 degrees. In the event of a fire the intumescent strip expands (intumesces) to many times its original volume and seals the gap around the door to provide a safe and effective barrier against the passage of fire and smoke.

Smoke seals, also called cold smoke seals, have an additional brush that fits around the edges of the door and are usually combined with an intumescent strip. They work by acting as a smoke barrier, helping reduce the amount of smoke from seeping around door frames long before the intumescent material has had time to expand to seal the gaps around a fire door.

Types of intumescent strips

Types of intumescent strips

The intumescent strips are supplied in either rebated or surface mounted; generally rebated seals are added when a new door is installed, as a groove will need to be routed out for the seal to be fitted into. Surface mounted seals are generally fitted to existing fire doors where there are no intumescent seals or where the seals have become damaged over time. With both types of seals these are fitted to the top and sides of each door. There are different kind of seals that can be fitted to the bottom of the door, should these be required.

Intumescent seals prevent the spread of fire but you may also need smoke seals in addition to prevent the spread of toxic smoke. Your fire door inspector (or fire risk assessment) will be able to advise you which type(s) of seal your door needs.

Fire only – intumescent seals for use where no smoke sealing is required. Likely to be used for doors that are for a small side room such as a broom cupboard without fire alarm which leads to a corridor with fire alarm. In this case it is important that the door allows the leakage of cold smoke from a fire in the broom cupboard to set off the alarm in the corridor.

Fire and smoke – intumescent seals for a safe and effective barrier against fire, cold smoke and hot gases. Smoke seals provide a permanent barrier to toxic smoke - particularly important as smoke fumes travel faster and further than the fire itself.

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