NBS Source
List your products

A versatile and economic unplasticized polyvinyl chloride (PVC-U) insulated closer with second fix applications for cavity widths of 50–100 mm.

All Dacatie products are manufactured to BS ISO9001 Quality Management and ISO14001 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.
  • Economic and versatile on site.
  • Accepts all window and door materials.
  • EPS Insulation is zero rated for ozone depletion potential (ODP).
  • Compliance with Building Regulations (E&W) Approved Document L (2010).
  • Green Guide Rating A+.
  • Robust Detail BR262.
  • National House Building Council (NHBC) approved.
  • Prevents water ingress.
  • Minimizes thermal bridging around reveals.

General information

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 Supafix Insulated Cavity Closer for window and door reveals


Supafix Cavity Closer 50

For 50 mm wide cavities only.

Supafix Cavity Closer 65

For 65 mm wide cavities only.

Supafix Cavity Closer 75

For 75 mm wide cavities only.

Supafix Cavity Closer 85

For 85 mm wide cavities only.

Supafix Cavity Closer 90

For 90 mm wide cavities only.

Supafix Cavity Closer 95

For 95 mm wide cavities only.

Supafix Cavity Closer 100

For 100 mm wide cavities only.


2100 mm

3000 mm

Standard product features

Weather rating:

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

Building Regulations compliance:

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


  • PVC-U carrier.
  • Fire rated mineral wool insulation.

Thermal conductivity (K-value):

0.038 W/m·K.

Thermal resistance (R-value):

0.658 m²K/W.


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

Third party certifications
  • 98/3437 : Product sheet 1
  • ISO 9001
  • ISO 14001
  • REACH: Compliance
  • NHBC: Compliance
  • Groundworks Green Business: Membership
Similar products from Dacatie Building Solutions, product brand of Quantum Profile Systems Ltd