Product Data Sheet Show all documents

SikaInject®-473

Low Viscosity Epoxy Injection Resin

SikaInject®-473 is a two component solvent free epoxy injection resin with an extended pot-life

  • High elastic modulus - effective transfer of of stresses at bond interface
  • High heat deflection temperature - resists creep at high service conditions
  • Low viscosity - effective penetration into very fine gaps < 0.1 mm
  • High bond strength - renders grouted area monolithic
  • Good bond to damp surfaces - advantage in humid environments
  • Long potlife - sufficient time to penetrate deeply
  • Pre proportioned - avoidance of site errors
  • Fast curing - fast return to service of repaired area
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Product Data Sheet Show all documents

Usage

Injection of fine cracks, joints, honeycombs, etc. Structural repair and waterproofing of concrete Applications include grouting of minute void for repair purposes. • Cold joints between different concrete pours • Stabilized cracks in structural elements • Unfilled voids behind tiles, stone facades and joints • Fine gaps around anchor bolts loosened due to improper grouting • Gap behind steel plate / epoxy plate bonding  

Advantages

  • High elastic modulus - effective transfer of of stresses at bond interface
  • High heat deflection temperature - resists creep at high service conditions
  • Low viscosity - effective penetration into very fine gaps < 0.1 mm
  • High bond strength - renders grouted area monolithic
  • Good bond to damp surfaces - advantage in humid environments
  • Long potlife - sufficient time to penetrate deeply
  • Pre proportioned - avoidance of site errors
  • Fast curing - fast return to service of repaired area

Packaging

Part A: 5.6 kg

Part B: 3.0 kg

Colour

Part A: clear amber, thin liquid

Part B: clear, thin liquid

Product Details

Product Information

Shelf Life

12 months from date of production

Storage Conditions

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperature between +5 °C and +35 °C.

Density

Mixed: ~1.07 kg/l

Viscosity

~350 cps (25°C)
Technical Information

Compressive Strength

> 70 MPa (ASTM D 695)

Modulus of Elasticity in Compression

> 2300 MPa (ASTM D 695)

Tensile Strength in Flexure

> 25 MPa (ASTM D 695)

Tensile Strength

> 12 MPa

Heat Deflection Temperature

60 °C

Application

Application Information

Mixing Ratio

Part A : Part B = 1.35 : 1 by volume

Substrate Temperature

5 °C (min. application temperature)

Pot Life

> 2.5 hours ( 1L pack at 25 °C)
Consumption

Yield

Usage will depend on the injection pressure and the size of the cracks and is impossible to estimate
Application steps

SUBSTRATE PREPARATION

Surface packers (injection ports): Remove all grease, oil, dust, residual curing compound, mould release agent or other contaminant that could impair adhesion of the injection ports.

Drill hole packers: blow dust out after drilling.

MIXING

Proportion part kits accurately mixing only what can be used in less than 30 minutes. Thoroughly stir Part A, add Part B and blend thoroughly using a slow speed mixer fitted with a suitable paddle.

 

APPLICATION

Surface packers/injection ports:

The injection ports should be applied over 6-10mm diameter holes drilled at least 50-75mm into the concrete element. For deeper penetration deeper holes should be considered.

Use suitable epoxy adhesive (e.g. Sikadur®-31+, Sikadur®-Combiflex® Adhesive) to adhere the injection ports over the holes ensuring that the adhesive does not block the drilled holes. Allow the adhesive to cure before injecting. The ports should follow the crack at intervals of 500mm or a maximum of 1m centres. Inject from the lowest point or furthest point towards the centre checking for resin coming out of the next hole along.

Drill hole packers:

Drill in 45° angle, intersecting the crack deep (ideally in the center) in the structure. Blow dust out, set packers and inject from the lowest point upwards. Leave the next packers open for control and continue injection from there, when resin is visible.

For detailed instructions for on crack injection ask your SikaInject® Representative for method statements.

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