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Intumescent mastic

Intumescent mastic

Intumenscent mastic comes in a 310ml cartridge and is used to seal gaps around fire doors, windows, cables, pipes, joints, voids and small holes in fire rated structures.

Available in white, brown and grey (see options below), it can fill gaps up to 25mm wide with no slump and can be overpainted.

With up to 4 hours of fire resistance, our mastic is suitable for interior use and has a long shelf life
Price and Quantity
Simply price: £4.23 + vat (£5.08 inc. vat)
Available: In Stock
Delivery: Next working day if ordered before 2pm
Details and Dimensions
  • Independently tested in accordance with BS476: Part 20 & 22: 1987
  • 4-hour fire resistance
  • For indoor use only
  • EN1366-4 LANTAC Building Control approved
  • NHBC Type Approval
  • Acoustic performance: Weighted Sound Reduction Index (RW) of up to 57db to BSEN ISO 140-3
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