MasterFlux HST 4120

Cementitious Ultra High Strength Precision Grout (formerly BluCem HS120)

How Does MasterFlux HST 4120 Work?

MasterFlux HST 4120 is a non-shrink ultra-high-strength cementitious grout. It is a pumpable grout with a flowable consistency designed for civil engineering applications, incorporating specially graded aggregates and advanced cement additives for enhanced performance.

Recommended Uses:

• Critical equipment baseplates, soleplates & columns.

• Crane rails, ball mills, crushers.

• Rolling, stamping, drawing and finishing mills for the steel and aluminium industries.

• Turbines, generators, pumps and centrifugal compressors.

• Applications requiring ultra-high early compressive strengths and ultimate compressive strengths– ideal for high-performance concrete repair in bridges, dams, and retaining walls.

• High flow for full compaction even in areas with congested steelwork.

• Marine and coastal structures – used in environments requiring high durability and resistance to aggressive conditions.

• Grouting and anchoring – applied in post-tensioning ducts, anchor grouting, and structural void filling.

What Are the Benefits of MasterFlux HST 4120?

• High early strength – rapid strength development for quick turnaround applications.

• Low shrinkage – minimises cracking and ensures long-term durability.

• High sulphate resistance – suitable for aggressive environments, including marine and underground conditions.

• Pumpable and flowable – easily applied in grouting and repair applications.

• Excellent bonding properties – ensures strong adhesion to concrete and reinforcement.

• Durability in harsh environments – resistant to water ingress and chemical attack.

• Reduced downtime – fast strength gain enables early reopening of work areas.