Dacatie Supafix Compression Fit Flexicloser Cavity Closer for window and door reveals


An easy to use flexible cavity closer where cavity widths are unknown or vary on site. Useful as a second fix application where a frame former is not required.

All Dacatie products are manufactured to BS ISO 9001 Quality Management and ISO 14001 Environmental standards. All Dacatie products are chlorofluorocarbon (CFC) hydrochlorofluorocarbon (HCFC) free and have zero ozone depletion potential (ODP) and low global warming potential (GWP).

Features and benefits:

  • 100% made in Britain.
  • Insulation with Ecose technology - Green Guide Rating A+.
  • One size fits all 50–100 mm.
  • Compliance with Building Regulations (E&W) Approved Document L (2010).
  • Robust Detail BR262.
  • National House Building Council (NHBC) approved.
  • Prevents water ingress.
  • Minimizes thermal bridging around reveals.

General information


Unplasticized polyvinyl chloride (PVC-U) carrier

Fire rated mineral wool insulation

Uniclass 2015

Pr_35_90_50_64 Plastics cavity closersPrimary


F30/18 Cavity closers

F30/180 Cavity closers

Specification data - Plastics cavity closers

Product Reference

Dacatie Supafix Compression Fit Flexicloser Cavity Closer for window and door reveals


SF Supafix Flexicloser

Standard. Suitable for cavities between 50–100 mm.

CSF Supafix Flexicloser

Check reveal. Suitable for cavities between 50–100 mm.

Standard product features

Weather rating:

  • Standard: (with 30 mm set back): Severe.
  • Check reveal: Very severe.

Cavity width:

Suitable for cavities between 50–100 mm.

Building Regulations compliance:

  • Part L (2013 amend) Conservation of fuel and power.
  • Part C (2010) Resistance to contaminants and moisture.


  • Unplasticized polyvinyl chloride (PVC-U) carrier.
  • Fire rated mineral wool insulation.

Thermal conductivity (K-value):

0.037 W/m·K.

Thermal resistance (R-value):

0.676 m²K/W.

Stock lengths:

2.4 m.


Ten lengths per pack.


Third party certifications

  • 98/3437 : Product sheet 1
  • ISO 9001
  • ISO 14001
  • REACH: Compliance
  • NHBC: Compliance
  • Groundworks Green Business: Membership

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