MasterEmaco N 425: Non-sag concrete repair mortar with integral corrosion inhibitor for vertical and overhead applications

Formerly: Gel Patch

How does MasterEmaco N 425 work?

MasterEmaco N 425 is a one-component fast-setting polymer modified portland cement-based repair mortar for vertical and overhead concrete and masonry surfaces.

Recommended uses:

  • Interior and exterior
  • Vertical and overhead
  • Above and below grade
  • Spalls or holes in concrete
  • Deteriorated edges

What are the unique features of MasterEmaco N 425?

  • Non-sag consistency able to be placed in 2" (51 mm) thick lifts
  • Readily sculpted, shaved, and finished to match existing substrate
  • Very low chloride permeability and an integral corrosion inhibitor protects reinforcing steel
  • Only requires the addition of potable water

What are the benefits of MasterEmaco N 425?

  • Low shrinkage produces stable, durable bond
  • Lightweight microscopic beads improve vertical and overhead workability
  • Polymer modification improves adhesion and provides increased freeze/thaw stability

On the Job Videos

US / Canada Product Information

Data Guide

Date Guide (French)

Data Guide (Spanish)

Certification Letter

Guide Spec

Guide Spec

LEED Letter

Direct contact

Master Builders Solutions Technical Support

Construction Systems


Safety Data Sheet (SDS)

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Related Literature

Certification Letter

pdf (76.40 Kb)

Data Guide

pdf (294.52 Kb)

Data Guide (French)

pdf (311.50 Kb)

Data Guide (Spanish)

pdf (179.69 Kb)

Guide Spec

doc (155.50 Kb)

Guide Spec

doc (155.00 Kb)

LEED Letter

pdf (92.80 Kb)

zip (84.16 Kb)