MasterSeal 912 - Waterstopping swelling paste

How does MasterSeal 912 work?

MasterSeal 912 is a single component, moisture curing pre-polymer which is reswellable when in contact with water, suitable for the permanent sealing of construction joints in concrete structures.

Recommended uses:

  • Construction joints of every kind.
  • Connecting joints in sheet pilings or diaphragm walls.
  • Sealing of bell butt joints.
  • Wall penetration for metal, plastic, concrete pipes and cable bushing.
  • Bonding of MasterSeal 910 swelling waterbars on very uneven or rough surfaces.  MasterSeal 910 swelling waterbars are pressed strongly into the paste bead.
  • Surrounding steel reinforcement bars on pile head.


What makes MasterSeal 912 a unique solution?

MasterSeal 912 has a high swelling capacity in contact with water.  It creates a water tight seal.


What are the benefits of MasterSeal 912?

  • Simple use - just gun along the joint
  • Highly resistant to chemicals and saline liquids – not affected by chemicals found in ground waters or the ocean
  • Good adhesion to dry and moist surfaces - suitable for concrete, steel and plastics
  • Reversible swelling process – joint will reseal after long dry periods