MasterEmaco T 545 and T 545HT: Very rapid-setting chemical action mortar

Formerly: Set 45 and Set 45 HW

How does MasterEmaco T 545 and T 545HT work?

MasterEmaco T 545 is a one-component magnesium phosphate-based mortar. Offered in two formulations: T 545 for ambient and substrate temperatures below 85° F (29° C) and T 545HT for ambient and substrate temperatures ranging from 85 to 100° F (29 to 38° C).

Recommended uses:

  • Interior and exterior
  • Horizontal and formed vertical overhead repairs
  • Applications requiring high early-strength gain
  • Structural concrete repairs
  • Partial and full-depth repairs
  • Cold temperature repairs
  • Grouting applications such as anchor bolts, rebar, dowel rods and precast applications

What are the unique features of MasterEmaco T 545 and T 545HT?

  • Single component to just add water and mix
  • Takes rubber tire traffic in 45 minutes
  • Wide temperature use range from below freezing to hot weather exposures
  • Air cure only, no wet curing compounds required
  • Coefficient of thermal expansion similar to Portland cement concrete for more permanent repairs
  • Higher sulfate resistance than conventional mortars

What are the benefits of MasterEmaco T 545 and T 545HT?

  • Reaches 2,000 psi compressive strength in 1 hour to rapidly return repairs to service
  • Very low drying shrinkage for improved bond to concrete for repair and anchoring applications
  • Resistant to freeze/thaw cycles and deicing chemicals so it is usable in most environments

On the Job Videos


US/Canada Product Information

Data Guide

Data Guide (French)

Certification Letter - T 545

Certification Letter - T 545HT

LEED Letter - T 545

LEED Letter - T 545HT

Direct contact

Master Builders Solutions Technical Support

Construction Systems


Safety Data Sheet (SDS)

Find all available safety data sheets for this product.

MasterEmaco T 545

MasterEmaco T 545HT

Product Certifications

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Related Literature

Certification Letter

pdf (55.29 Kb)

Data Guide

pdf (103.57 Kb)