TamSeal TG12

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TamSeal TG12 is a special first fill grade tail sealant to be used on shielded tunnel boring machines (TBM). Together with the wire brushes, the sealant forms an impermeable barrier between the tail shield of the TBM and the concrete segments to effectively seal off any ingress of water, muck and backfill grout back into the TBM invert.

Key Benefits
  • Excellent interaction with the brush seal due to new fibre generation
  • Excellent resistance to water
  • Not mixable with annulus grouts
  • Protects the brushes against wear