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XFR2000 is a fire-rated insulated cavity closer, designed for second fix applications in wider cavities 100–200 mm. With 60 minute fire integrity, XFR2000 will act as a fire barrier around window and door reveals – complying with the requirements of the Building Regulations (E&W), Approved Documents B as well as L.

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.
  • Wide cavity closer and fire barrier.
  • 60 minute fire integrity and 30 minute insulation.
  • Complies with the requirements of the Building Regulations (E&W), Approved Documents B and L.
  • Reduces risk of condensation, mould and moisture migration across the cavity.
  • Water resistant.
  • Easy to install.
  • No ties required – simply nail to blocks.
  • Suitable for brick to brick/ block and brick to timber installations.
  • Class 0 rated foil covering.
  • Environmental friendly, 50 mm thick Ecose mineral wool insulation – formaldehyde free.
  • Green Guide Rating A+.
  • Robust Detail BR262.
  • National House Building Council (NHBC) approved.

General information

Unplasticized polyvinyl chloride (PVC-U) carrier

Fire rated mineral wool insulation

Uniclass 2015
Plastics cavity closers (Pr_35_90_50_64)Primary
Specification data - Plastics cavity closers
Product Reference

Dacatie 1 Hour Fire Rated XFR2000 Fire Cavity Barrier for Window and Door Reveals


XFR2000 Cavity Closer 110

For 110 mm wide cavities only.

XFR2000 Cavity Closer 125

For 125 mm wide cavities only.

XFR2000 Cavity Closer 150

For 150 mm wide cavities only.

XFR2000 Cavity Closer 170

For 170 mm wide cavities only.

Standard product features

Building Regulations compliance:

  • Part L (2013 amend) Conservation of fuel and power.
  • Part B (2019 edition) Fire Safety.
  • Part C (2010) Resistance to contaminants and moisture.


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

Thermal conductivity (K-value):

0.036 W/m·K.

Thermal resistance (R-value):

1.389 m²K/W.

Fire performance:

  • Fire rating to BS 476.
  • 60 mins fire integrity/ 30 mins fire insulation.
  • Euroclass Reaction to Fire classification: A1.


  • Zero ozone depletion potential (ODP) and zero global warming potential (GWP).
  • ISO 14001 environmental.

Stock length:

2.4 m.

Product Options


Check reveal: Use 'C' prefix, e.g. CXFR2100.

Third party certifications
  • 98/3437 : Product sheet 5
  • ISO 9001
  • ISO 14001
  • REACH: Compliance
  • NHBC: Compliance
  • Groundworks Green Business: Membership
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