Sika crete® Gunit-103

Cementitious Concrete Repair Mortar for Dry-Spray Applications, Suitable for Large-Volume Repairs

Sikacrete® Gunit-103 is a one-component cementitious repair mortar designed for concrete repair using the dry-spray method. The product contains microsilica and flow-enhancing admixtures to improve spraying performance, compaction, and adhesion to existing concrete substrates.

The product is designed for large-scale concrete repair applications requiring fast installation, high strength, and reduced on-site work procedures. Although it contains no setting accelerators, it develops good early strength. It is suitable for reinforced concrete structures, soffit repairs, tunnel applications, and difficult-to-access areas.

With its high-density mortar composition, excellent compaction properties, and reduced rebound, dust, and material waste, Sikacrete® Gunit-103 helps accelerate repair work while reducing labor, scaffolding, and formwork costs. The sprayed surface can also be screeded and leveled after application.

Applications of Sika crete® Gunit-103

Sikacrete® Gunit-103 is suitable for large-scale concrete repair applications using the dry-spray method, such as:

• Large-volume repairs of reinforced concrete structures

• Concrete repairs requiring high early strength

• Thick concrete repairs over large areas

• Concrete soffit repairs and overhead applications

• Tunnel lining and tunnel repair works

• Ground stabilization and structural support applications

• Repair areas with difficult access that require mechanized application systems

• Applications requiring reduced use of formwork or scaffolding

Key Features of Sika crete® Gunit-103

• Ready-to-use, one-component cementitious repair mortar

• Suitable for mechanized dry-spray applications

• Contains microsilica and flow-enhancing admixtures

• Rapid strength development without requiring setting accelerators

• Can be sprayed at thicknesses of up to 150 mm in a single application

• Low shrinkage, with drying shrinkage of approximately 600 microstrain at 28 days

• High density and excellent compaction properties

• Good adhesion to existing concrete

• Enhanced sulfate resistance

• Reduced rebound, material waste, and dust during application

• Helps reduce labor, scaffolding, and formwork costs

• Improves the speed and efficiency of structural repair work

• The surface can be screeded and leveled after spraying

• Application can be conveniently started or stopped according to site conditions

• Suitable for difficult-to-access areas or large repair areas

• Manufactured under quality-controlled processes to ensure consistent performance

Application Method

• Pour dry Sikacrete® Gunit-103 powder directly into the hopper

• Add water at the nozzle

• The spray nozzle should be operated by an experienced applicator

• After spraying, the surface can be immediately screeded or finished with a trowel

Curing

After spraying, moisture loss must be prevented during the early curing period. The product documentation recommends using Sika Antisol Curing Membrane to help reduce water evaporation.

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