MD3 Duct Sealing System

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 MD3, 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 MD3 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
• Radon proof
• After mixing the polyurethane sealant it will expand and cures/hardens with a high density and a closed cell structure
• 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