MasterSeal 912 - Swelling gasket in paste form

Formerly Masterflex 612

How does MasterSeal 912 work?

MasterSeal 912 is a one 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 and concrete pipes, cable bushing
  • Bonding of MasterSeal 910 swelling waterstops on very uneven or rough surfaces. MasterSeal 910 swelling waterstops are pressed strongly into the paste bead
  • Surrounding steel reinforcement bars on pile heads.

What makes MasterSeal 912 a unique solution?

MasterSeal 912 is a one component hydro-swelling gasket in paste form. It’s suitable for the permanent sealing of construction joints in concrete structures.

What are the features and benefits of MasterSeal 912?

  • Simple use
  • High swelling capacity in contact with water
  • Highly resistant to chemicals and saline liquids
  • Good adhesion to dry and moist surfaces (concrete, steel and plastics)
  • Reversible swelling process