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Fire Door Build-Up Kit – 20mm x 1070mm

$177.22 Exc. GST

The Intumescent Door Bottom Seal is fitted to the bottom of the door leaf. It consist of an anodised aluminium profile, flame retardant smoke, draught and light excluding silicone gasket and integral high performance intumescent fire seals.

Used to upgrade existing fire doors where door bottom gaps exceed the allowable 10mm as per AS1905/1.

Part Number: BFDBU201070 Categories: ,
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  • Approvals : AS 1530.4
  • Box Quantity : 1
  • Colour : Clear Anodised (Silver) with grey gaskets
  • Fire Rating : 2 Hour
  • Length (mm) : 1070mm
  • Single Units : Yes

Product Information

  • Can provide up to 2 hours fire resistance when fitted to the bottom of proprietary fire doors.
  • Non-compliant fire doors can be salvaged.
  • Avoids expensive door build – ups or door replacements.
  • Cost-effective solution.
  • Easy retro-fit installation.
  • No need to remove the door during installation.

Gap Size
To seal gap sizes up to 20mm maximum, under nom. 35mm and 45mm proprietary doors.

Sizes & Finishes
Standard Lengths – 820mm, 920mm, 1070mm and 1220mm
Colours – Clear Anodised (Silver) with grey gaskets
Fixing – Supplied with pre-drilled slotted holes and screws for easy application onto the bottom of door leafs


  • Fully tested to AS1530.4 for up to 2 hours on proprietary fire door assemblies
  • Complies with AS1905/1

Additional information

Weight 20 kg

TDS – BOSS Fire Door Seals