Filoform MDIV Duct Sealing System (MDIV-1, MDIV-3, MDIV-4)

Product overview

Filoform MDIV Duct Sealing System is suitable for quick and easy sealing of empty ducts / boreholes where cables or pipes are to be installed at a later date. The system provides an effective Gas and Watertight seal. Suitable for ducts with a diameter of 75mm up to 160mm.
Filoform Part Numbers: MDIV-1 (280301), MDIV-3 (280321), MDIV-4 (280331P).

Filoform Duct Sealing Systems provide an effective gas and watertight seal of underground cable penetrations and protect valuables from damage appearing due to gas and water leaks. They are specified and used by major Electrical, Gas, & Water Utility companies in the UK and Benelux countries.

Filoform MD Duct Sealing System Expansion

Application Process

Filoform duct seals type MD are based on a specially formulated two-component expanding polyurethane resin. The polyurethane sealant comes in a transparent plastic bag with a screw ring. In this plastic bag, a clamping profile separates the two components. After removal of the clamping profile, simply mix the two components for 30 seconds. The package is now ready for use and can be easily opened with the use of the screw nipple.

After pouring the resin in the duct, the resin starts expanding by forming CO². During the expansion the polyurethane filling material penetrates all areas inside the duct, thus sealing all openings regardless of the shape of the duct or borehole. After this the hardening process starts. The Filoform two component filler provides not only a 100% gas and watertight seal but also offers excellent mechanical strength.

The MDIV system (MDIV-1, MDIV-3, MDIV-4) is suitable in situations where more than one cable or pipe is in the duct. The opening of the duct does not need to be completely round and is far superior to aerosol foams.

Filoform MDIV Duct Sealing System Drawing

Filoform MDIV Duct Sealing System – Key Features

  • Gas- and Water tight 1,0bar
  • Can become Fire resistant by using MD+
  • Resistant to Hydrogen Sulphide / Methane and many other Gases
  • Complies with ATEX regulations
  • WIMES Compliant, (3.02 2013 clause c)
  • 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, can be installed retrospectively
  • Over 25 years of operational experience

For Additional Information on Filoform MDIV Duct Sealing System (MDIV-1, MDIV-3, MDIV-4), 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
280301 MDIV-1 Ø 75- 95 Ø 75-95 not applicable per piece
280321 MDIV-3 Ø 95- 125 Ø 95-125 not applicable per piece
280331P MDIV-4 Ø 125- 160 Ø 125-160 not applicable per piece

Expanding Resin Specifications

Properties Unit Value
Start time expansion seconds > 95
End time expansion minutes 15
Compressive strength N / cm² > 60
Density 1,0bar 30 days no leakage
Density 10m 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

Kit Contents

  • Coil shaped unit
  • Expanding polyurethane filler
  • Screw nipple
  • Set protective gloves
  • Sandpaper
  • Installation instructions

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