MD5 Duct sealing system

The MD5 duct sealing system uses a specially formulated two-component expanding polyurethane resin. The polyurethane sealant is supplied in a two-component cartridge. The two liquid parts are formulated to be mixed at a 1:1 ratio, using the 2K cartridge and mixing nozzle provided.

After injecting the resin into the duct, the resin starts expanding by forming CO². During the expansion, the polyurethane resin penetrates all areas between the two foam flanges inside the duct. MD5 is suitable for all openings regardless of the shape of the duct or borehole and cable configuration.

After full curing, the Filoform two-component resin provides a 100% gas and watertight seal and offers excellent mechanical strength & rodent resistance. MD5 duct sealant is compatible with common cable jacket /sheath materials and PE drinking water conduits. The cured duct sealant is an inert solid mass that does not affect any of the materials inside of the duct.

The MD5 system has been designed to support and separate multiple cables in a duct / conduit using our uniquely designed duplex foam, whilst reducing excess expansion of resin out the front of the duct; This ensures a neater, less messy professional finish.  The opening of the duct does not need to be completely round.

Installation

• One box solution
  Everything needed to seal one duct end (except a caulking gun).
• Cable Separation
  It is vital, to make sure the duplex foam is wrapped around each cable, to create separation from each other and the inside of the duct.
• Running water
  The duct & cables must be as dry as possible with no running water and free from any dirt, oil, greese & debris. MD5’s resin can cope with small amounts of moisture in the duct or on the cables, but larger amounts of water will reduce the effectiveness. Please contact our technical department if you have any questions.

Cure time

MD5’s resin can be installed in temperatures from 5°C (41°F). In colder temperatures, expansion can be slower but will expand and cure over a more extended time. Expansion time between 8-10 minutes at temperature ranging between 15-20°C.

Cleaning

Should any un-mixed material spill onto a surface, a solvent wipe can be used to help clean the area.

Reentering & removal

Properties of Cured resin: Fairley dense structure however can be dug out with a blunt tool & Hammer with some degree of difficulty.(Please note there is between 10-15 cm (4-6”) of the expanding resin in each seal depending on the size of duct)

• Remove all of the front foam that is separating the cables with a pair of pliers or cutting tool
• Using a hammer & chisel or similar tool to break the seal around the cable and the inside of the duct
• If there is room and the cables are de-energized, a power tool to speed the process up could be used. Once the seal is broken from the cable, there may be a crust of resin still present on the cable; this is due to the excellent adhesion our resin has. The hardest part of removing this seal is the crust that forms when the resin soaks into the foam flange.

Safety

MD5’s specially formulated two-component resin is part of the same chemical/product family of similar electrical and construction industry products. These products have been widely used for decades. As with all two-component resins safety precautions must be understood to handle and install these types of materials. MD5’s resin is contained in a state of the art 2K cartridge, which reduces contact with the raw materials. When the two components are mixed, the resin expands and forms a high density, closed-cell polyurethane foam and is inert and non-toxic when fully cured.

Storage conditions

The cartridges should be kept in a cool, dry environment and away from direct sunlight. Product shelf life is 18 months, and providing the cap is correctly inserted after use, then remaining product in the cartridge can be used within two months of opening.

Specifications & Standards

• Gas and watertight up to 1.5 bar / 21 PSI (30 days)
• Gas and watertight up to 2.5 bar (7 days)
• After injecting, the polyurethane sealant will expand and cures/hardens with a high density and a closed cell structure
• Easy and quick installation
• One complete kit - Everything you need except for a standard caulking gun
• Suitable for single & multiple cables
• Compatible with a wide range of cable and conduit materials: PVC & PEsheathed cables, PILC cables, (HD)PE ducts, & PE drinking water conduits • High mechanical strength, resists ground movement, shocks and vibrations
• Complies with DIN 18322 underground cable laying works - gas & watertight cable and conduit entries into buildings • Complies with 2011 NEC Articles 225.27, 230.8, 300.5(G), 300.7 (A) on Raceway Seals, and 501.15