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Shop our 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. Tested on block wall, concrete, masonry and plasterboard partition, on linear joints up to 60mm wide, and is suitable for flexible walls, regid walls and floors. It's also tested in larger service openings up to 490 x 150mm.

Available in white, brown and grey (see options below), it can fill gaps up to 25mm wide with no slump, can be overpainted and is also halofen free, as well as resistant to fungi and vermin.

With up to 4 hours of fire resistance, our mastic is suitable for interior use and has a long shelf life. CE Marked, Certifure Approved, UL-EU Listed, the mastic has been independently tested in accordance with BS476 and EN requirements for preventing the passage of fire and smoke when exposed to the heat of a fire. Additonally, it provides acoustic isolation to 63 decibels and has been tested for air permeability as well as mechanical adhesion and tensile testing.

Price and Quantity
Simply price: £4.44 + vat (£5.33 inc. vat)
Available: In Stock
Delivery: Next working day if ordered before 2pm
Details and Dimensions
  • Independently ested in accordance with EN 1366-3 : 2009 and EN 1366-4 : 2006
  • 4-hour fire resistance - Fire Classification to EN 13501-2.
  • For indoor use only
  • EN1366-4 LANTAC Building Control approved
  • Acoustic Isolation to EN 10140 to 63dB.
  • Air Permeability testing to EN 1026 to 600Pa - 100Pa 0.0/0.0 m3/h/m2
  • Mechanical Adhesion and Tensile testing to EN ISO 8039 & EN ISO 9046
  • CE Marked, Certifire Approved, UL-EU Listed
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