For horizontal and vertical linear joints in masonry and concrete walls and floors.


Firestopping strips manufactured pre-cut to fit the specific gap size and depth of the joint, depending on the fire rating required. The thickness of the strip is supplied larger than the gap size, for a compression fit.

Features and benefits:

  • Supplied to suit joint size.
  • Airtight and smoke seal when used in conjunction with Fastight Coating.
  • Available shrink wrapped to prevent fibre migration.
  • Improved acoustic performance when applied with Fastight Coating.
  • Suitable for installation from both sides as a two-strip system.
  • Approved for use on London Underground/ Crossrail projects.


For horizontal and vertical linear joints in masonry and concrete walls and floors.

General information


Stone wool

Uniclass 2015

Pr_25_80_81_51 Mineral wool fire-stoppingPrimary


P12/160 Linear gap sealing

Specification data - Mineral wool fire-stopping

Product Reference

PFC Corofil C144 Firestop Strips

Joint size

Insert requirement.

Standard product features


Stone wool.

Fire rating (to BS 476-20: 1987):

Available up to six hours (360 minutes) dependent on joint size, consult manufacturer's literature for more information.

Acoustic performance:

Tested in a 25 mm gap with a reference wall, giving a weighted sound reduction index (Rw) of 58 dB. Two C144 Firestop Strips coated with Fastight Coating and installed with an air gap in between provides a weighted sound reduction index (Rw) of 57 dB. Contact manufacturer for further information.

Third party certifications

  • IFC: FS453-16 : Certification
  • LUL: Certificate: 2299 : Approval

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