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Sika® Injection-458

Sika® Injection-458

Epoxy resin based, rigid structural injection material with an extended pot life

Sika® Injection-458 is a rigid, solvent free, low viscosity, high strength, structural epoxy resin based injection material with an extended / long pot life.

  • Low viscosity
  • Excellent adhesion, including at its edge / perimeter
  • Very good bond to both dry and damp structures (i.e. concrete, masonry and natural stone etc.)
  • Long / extended pot life even when used at higher temperatures
  • Hardens to create a barrier against water infiltration and corrosive agents
  • Due to its low viscosity it can penetrates into cracks down to >0.2 mm in width
  • Injection by simple 1-component pumps
  • Solvent-free
 
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Areas of Application

Sika® Injection-458 is suitable for use in both dry and damp substrates such as in and around concrete, steel, brick and natural stone, particularly in civil engineering structures i.e. for bridges, tunnels and shafts etc. It is also suitable for injection repairs to bond and fill voids between concrete blinding, floor slabs and screeds.

Advantages

  • Low viscosity
  • Excellent adhesion, including at its edge / perimeter
  • Very good bond to both dry and damp structures (i.e. concrete, masonry and natural stone etc.)
  • Long / extended pot life even when used at higher temperatures
  • Hardens to create a barrier against water infiltration and corrosive agents
  • Due to its low viscosity it can penetrates into cracks down to >0.2 mm in width
  • Injection by simple 1-component pumps
  • Solvent-free
 

Packaging

Component A

11.20 kg

Component B

9.50 kg

Color

Component A

yellow - transparent

Component B

brown

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Concrete injection for force transmitting filling of cracks, voids and interstices (F) according to EN 1504-5:2004, Declaration of Performance  73853610, certified by notified factory production control certification body 0761 and provided with the CE marking.
Product Information

Composition

Solvent free, 2-component Epoxy resin

Shelf life

12 months shelf life from date of production if stored properly in undamaged, unopened, original sealed packaging.

Storage conditions

Dry storage at temperatures from +8 °C up to +25 °C. Protect from direct sunlight and humidity.

Density

Component A:

~1.10 kg/l

Component B:

~0.94 kg/l

at 20 °C

Viscosity

Temperature

Viscosity

+23 °C

~360 mPa s

+30 °C

~215 mPa s
Technical Information

Shore D Hardness

~70

(EN 868)

Compressive strength

~48 N/mm²

(ISO 604)

Tensile strength in flexure

~55 N/mm²(ISO 178)

Tensile strength

~18 N/mm²(ISO 527-1)

Application

Application Information

Mixing ratio

2 : 1 parts by volume (refer to Application Instructions/Mixing)

Ambient air temperature

+12 °C min. / +35 °C max.

Substrate temperature

+12 °C min. / +35 °C max.

Pot Life

Temperature

Pot Life

+12 °C

~120 min

+23 °C

~90 min

+30 °C~55 min

Curing time

Temperature

Fully Cured

+12 °C

~3 days

+30 °C

~1 day
Application steps

SUBSTRATE PREPARATION

Surfaces and cracks need to be clean, free of loose and friable particles, dust (e.g. blown out with clean compressed air) and free of any other bond-breaking materials or obstructions.

MIXING

Sika® Injection-458 is supplied in containers pre-batched according to the required mixing ratio of 2:1 by volume.
Sika® Injection-458 is always applied with 1-component injection pumps

  • Empty components A and B completely into a clean mixing vessel and mix until homogeneous. If required, smaller quantities can be measured out and mixed in the correct proportions of 2:1 by volume.
  • Mix the components together thoroughly but without excessive aeration, using a low-speed mechanical stirrer (max 300 rpm) for at least 3 minutes until a fully homogeneous mixture is obtained. Make sure that the material on the container walls and bottom is also mixed in thoroughly. Use a spatula or pour the material into another clean container and mix again.
  • Once mixed fill the material into the 1-C pump's feed container, stir briefly and use completely within pot life.

CLEANING OF EQUIPMENT

Clean all tools and application equipment using the Sika® Injection Cleaning System according to the Product Data Sheet. Hardened/cured material can only be removed from external surfaces mechanically.