Product Data Sheet
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Sika® Injection-216

STRUCTURAL POLYURETHANE INJECTION RESIN

Sika® Injection-216 is a 2-part, polyurethane structural injection resin. It is specially formulated for crack injection work by pressure injection.

  • Very good adhesion to concrete, masonry and stone.
  • Suitable for dry, damp and wet conditions
  • Very high mechanical properties
  • Fast curing with or without water contact
  • Reaction time adjustable with accelerator
  • Injectable with 1-component or 2-component pumps
  • Compatible with concrete, mortar, metal, plastic coated components, cable coatings, etc.
  • Resistant to salts, alkali and acids present in construction components or in the ground
  • Prevents the ingress of water and infiltration which can cause reinforcement corrosion
Product Data Sheet
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Usage

Fills and seals voids and cracks in structures and construction elements such as:
  • Bridges
  • Civil engineering structures
  • Tunnels
  • Mines
  • Industrial and residential buildings
  • Water retaining structures
  • Ground stabilisation
  • Columns
  • Beams
  • Foundations
  • Walls
  • Floors
 

Advantages

  • Very good adhesion to concrete, masonry and stone.
  • Suitable for dry, damp and wet conditions
  • Very high mechanical properties
  • Fast curing with or without water contact
  • Reaction time adjustable with accelerator
  • Injectable with 1-component or 2-component pumps
  • Compatible with concrete, mortar, metal, plastic coated components, cable coatings, etc.
  • Resistant to salts, alkali and acids present in construction components or in the ground
  • Prevents the ingress of water and infiltration which can cause reinforcement corrosion

Packaging

Part A

9,9 kg

Part B

12 kg

Refer to current price list for packaging variations.

Colour

Part A:

yellowish

Part B

brown

Part A+B mixed

~ amber

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

  • CE Marking and Declaration of Performance to EN 1504-5 - Concrete injection
  • Drinking Water Approva, Sika® Injection-216, KTW- B, LADR
Product Information

Composition / Manufacturing

Polyurethane

Shelf Life

24 months from date of production

Storage Conditions

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

Density

Part A

~1,0 kg/l

Part B

~1,2 kg/l

Viscosity

~425 mPa·s (+23 °C)

Product Declaration

EN 1504-5: Concrete injection
Technical Information

Compressive Strength

~70 N/mm2 (7 days / +21 °C)

(ISO 604)

Tensile Strength

~30 N/mm2 (7 days / +21 °C)

(ISO 527)

Reaction to Fire

B2

(DIN 4102-4)

Chemical Resistance

Resistant to salts, alkali and acids present in construction components or in the ground. Contact Sika Technical Services for additional information.

Application

Application Information

Mixing Ratio

A : B = 1 : 1 parts by volume

A : B = 1 : 1,2 parts by weight

Substrate Temperature

> +1 °C

Pot Life

Temperature

Time

+10 °C

~50 minutes

+20 °C

~25 minutes

+30 °C

~10 minutes

The pot life begins when Parts A+B are mixed. It is shorter at high temperatures and longer at low temperatures. The greater the quantity mixed, the shorter the pot life. To obtain longer workability at high temperatures, chill Parts A+B before mixing (not below +5 °C).
Application steps

SUBSTRATE QUALITY

Crack injection: Concrete / masonry

  • The substrate surface along the line of the crack capping sealer (i.e. Sikadur®-31 CF Rapid), must be sound, clean, dry or matt damp.
  • It must also be  free from standing water, ice, dirt, oil, grease, coatings, laitance, efflorescence, old surface treatments, all loose particles and any other surface contaminants that could affect adhesion of the capping sealer.

SUBSTRATE PREPARATION

Crack injection: Concrete / masonry

  • Cracks may be dry, damp or wet, but free from standing water.
  • After inserting or bonding injection ports, cap the crack with a capping sealer (i.e. Sikadur®-31 CF Rapid) and allow to cure.
  • Remove any standing water by oil free compressed air.
  • Remove contaminants by purging crack with resin until the resin runs clean and contaminant free.

MIXING

IMPORTANT: Mix full units only.

IMPORTANT: Avoid over-mixing to minimise air entrainment.

Requirement: Use a low speed electric single paddle mixer and stirrer (300–400 rpm) for mixing

Note: Mix only the quantity that can be used within its pot life.

1-Component pump

  1. Add Parts A + B into a clean, dry mixing container.
  2. Mix Parts A + B continuously for ~2,0 minutes until a uniformly coloured mix is achieved.
  3. Add mixed resin into the pump's hopper.

2-Component pump

  1. Add Part A and Part B into the 2 separate pump dispensers.
  2. Set the metering ratio of the pump to: A : B = 1 : 1 parts by volume A : B = 1 : 1,2 parts by weight
  3. Parts A + B will be mixed automatically by the pump`s mixing head (static-mixing element).  

CLEAN UP

  • Clean all tools and equipment using the Sika® Injection Cleaning System. Refer to the Product Data Sheet.
  • Use Sika® Injection Cleaner C1 for pump cleaning of non-cured resin. Hardened material can only be mechanically removed.

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