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Duct sealing system type MDII has been developed to provide an effective and simple solution for all your Gas and Watertight duct sealing requirements. Seals internally & externally around the outside edge of the duct Suitable for ducts with a diameter of 40mm up to 200mm and cables or pipes with a diameter up to 160mm. All our duct sealing systems are specified and used by major Electrical, Gas, & Water Utility companies in the UK and Benelux countries. |
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Filoform duct sealing systems have been developed to provide an effective gas and watertight seal of underground cable penetrations. When installing our duct sealing system MDII, you will protect valuables from damage which is caused by gas and water leaks.
Filoform duct seals type MD are based on a specially formulated two-component expanding polyurethane resin. The polyurethane sealant is packed in a transparent plastic bag with a screw ring. In this plastic bag, the two components are separated by a clamping profile. After removal of the clamping profile, the two components are simply mixed together 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 MDII system 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.
- Gas- and watertight 1,0 bar
- Can be used in any shaped or sized duct up to 200mm
- Easy and quick installation
- One complete kit for sealing of one duct
- Seals all known materials: PVC & PE sheeted cables, PILC cables, (HD)PE pipes, PE drink water conduits
- High mechanical strength, resists ground movement, shocks and vibrations
- Also suitable for renovation works
- No architectural measures necessary
- Used by various utility companies as well as contractors
- Over 25 years of operational experience
| Properties | Unit | Value |
| Start time expansion | seconds | > 95 |
| End time expansion | minutes | 15 |
| Compressive strength | N / cm² | > 60 |
| Gas and water tightness 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 |
| Temperature resistance | °C | +120 |
| 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 |
| Resistance | ||
| Moulds | good | |
| Rodents | good | |
| Shelf life | months | minimal 30 |
| More information |
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| Home page product list | No |
Doorvoerdichting MD II (EN) from Filoform on Vimeo.