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

MasterSeal 378

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MasterSeal 501/502

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MasterSeal 505

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MasterSeal 530

- Surface applied capillary waterproofing for concrete and mortar

MasterSeal 540

- Flexible, cementitious waterproofing membrane

MasterSeal 898

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MasterSeal 901

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MasterSeal 909

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MasterSeal CR 170

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MasterSeal CR 171

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MasterSeal CR 460

- Polyurethane joint sealant

MasterSeal GG 470

- High Performance, Elastomeric Joint Sealant (Gun Grade)

MasterSeal M 388

- Solar radiation reflective waterproofing system top coat

MasterSeal PG 470

- High performance, elastomeric joint sealant (Pouring Grade)

MasterSeal Traffic 2205

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MasterSeal Traffic 2255

- Trafficable waterproofing system for parking floors

MasterSeal Traffic 2262

- An exceptionally hard wearing coating system

MasterSeal Traffic 2271

- Economical glossy car park deck coating system

MasterSeal 345

– Waterproofing membrane

MasterSeal 550

- Flexible, cementitious waterproofing membrane

MasterSeal 581

- A waterproof cement-based coating for concrete and masonry

MasterSeal 590

- One-component, cement-based, fast-setting water-stop repair mortar

MasterSeal 600

- Special formulation of acrylic polymers and modifiers designed for use as an additive for cement mixes and other highly-alkaline building materials

MasterSeal 910

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MasterSeal 912

MasterSeal HLM 5000

- Liquid, cold-applied elastomeric waterproofing membrane system

MasterSeal NP 472

- One part polyurethane based elastomeric joint sealant

MasterSeal NP 474

- Single component, high modulus polyurethane joint sealant for floors

MasterSeal Roof 3500

- Liquid applied crack bridging waterproofing membrane

MasterSeal Traffic 1500 MD

- Medium duty traffic deck crack-bridging waterproofing system

MasterSeal Traffic 2000 HD

- Traffic deck crack-bridging waterproofing system

MasterSeal Traffic 2500 HD

– Fast return to service Traffic deck crack-bridging waterproofing system