Filoform MDI MD1 Duct Sealing System

Product overview

Filoform MDI Duct Sealing System has been developed for sealing ducts containing pliable cables such as coax and rubberised cables, which can be easily bent to a right angle. Suitable for ducts with a diameter of 16mm up to 60mm and cables or pipes with a diameter up to 25mm.
Filoform Part Numbers: MDI-1 (280220), MDI-2 (280223P)

This system allows these usually vulnerable cables to be sealed anywhere along a wall where the cable enters a building. Filoform Duct Sealing Systems are specified and used by major Electrical, Gas, & Water Utility companies in the UK and Benelux countries.


Filoform MDI Duct Sealing System Drawing

Filoform MDI Duct Sealing System – Key Features

  • High levels of Gas and Water tightness
  • Resistant to Hydrogen Sulphide / Methane and many other Gases
  • Complies with ATEX regulations
  • Suitable for ducts / bore holes
  • Quick and easy installation
  • A complete kit for one duct
  • Seals all know materials, PVC & PE sheathed cables, PILC, (HD) PE pipes
  • Excellent mechanical strength, after curing resistant to movements, shocks and vibrations
  • Suitable for renovations, installation can take place retrospectively
  • Over 25 years of operational experience

For Additional Information on Filoform MDI Duct Sealing System (MDI-1, MDI-2), please refer to the Technical Data Table below or download PDF File.

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Technical Data

Part Number Product Name Duct Diameter
Min - Max (mm)
Max Cable Diameter
in the duct (mm)
Order Unit
280220 MDI-1 25mm duct sealing kit Ø 16-32 Ø 12,5 max. per piece
280223P MDI-2 50mm duct sealing kit Ø 32-60 Ø 25 max. per piece

Dimensions Cap

Item Number Outer Diameter Inner Diameter Height
80221 104 mm 72 mm 30 mm
80223 132 mm 106 mm 45 mm

Expanding Resin Specifications

Properties Unit Value
Start time expansion seconds > 95
End time expansion minutes 15
Compressive strength N / cm² > 100
Density 0,5bar 30 days no leakage
Density 5m water column 30 days no leakage
Volume consistency cube 10 x 10cm no change
Temperature Cycles, -20°C tot +40°C 10 consecutive cycles no leakage
Vibration test 10 Hz/amplitude 3mm 240 hours no leakage
Axial tensile force diameter x 10 N no leakage
Resistance to bending cables 45° in 2 directions >250mm no leakage
Expansion polyurethane foam in pipe cm < 40
Chemical resistance
0,1N Na₂SO₄: 30 days - no degradation
0,1N NaCl: 30 days - no degradation
0,1N H₂SO₄: 30 days - no degradation
0,1N NaOH: 30 days - no degradation
Diesel: 30 days - no degradation
Gasoline: 30 days - no degradation
Moulds: good
Rodents: good
Shelf life: months - minimal 30

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