Product Data Sheet Safety Data Sheet Show all documents

Sika® Rugasol® C Extra

CONCRETE SURFACE RETARDER FOR CONSTRUCTION JOINTS

Sika® Rugasol® C Extra has been specifically designed and formulated for obtaining a clean exposed aggregate surface at the face of construction joints where concrete with strengths in excess of 20 MPa are used. [For concrete strengths less than 20 MPa, use Sika® Rugasol C® (NZ).] Sika® Rugasol® C Extra is an economical and easy to apply product for use on the horizontal face of freshly poured construction joints. The result is a clean and uniform depth of aggregate exposure.  The retarding compound in Sika® Rugasol® C Extra combines with concrete at the surface to delay the normal hydration of cement for a depth of approximately 3 ‐ 6mm.

  • Sika® Rugasol® C Extra is very economical and simple to apply
  • Using Sika® Rugasol® C Extra to obtain a mechanical key eliminates the costly expense of bush hammering, scabbling or sandblasting
  • Aggregate exposed with Sika® Rugasol® C Extra remains unbroken and firmly embedded in the concrete, ensuring that a strong and tenacious bond is achieved at the construction joint between existing and new concrete
  • If accidentally applied to steel reinforcement it will not affect the long term bond of concrete to the steel
Sika® Rugasol® C Extra
Where to buy
Product Data Sheet Safety Data Sheet Show all documents

Usage

  • For use on horizontal construction joints to prepare an excellent ‘keyed’ surface for the bonding of subsequent concrete pours
  • It can also be used to achieve decorative architectural finishes on concrete with strengths above 20 MPa
 

Advantages

  • Sika® Rugasol® C Extra is very economical and simple to apply
  • Using Sika® Rugasol® C Extra to obtain a mechanical key eliminates the costly expense of bush hammering, scabbling or sandblasting
  • Aggregate exposed with Sika® Rugasol® C Extra remains unbroken and firmly embedded in the concrete, ensuring that a strong and tenacious bond is achieved at the construction joint between existing and new concrete
  • If accidentally applied to steel reinforcement it will not affect the long term bond of concrete to the steel

Packaging

20 litre and 200 litre non refundable containers

Colour

Green liquid

Product Details

Product Information

Shelf Life

Twelve (12) months from date of manufacture when stored as stated.

Storage Conditions

Store between +5°C and +30°C. Do not expose to direct sunlight in storage.

Density

~ 1.060 kg/litre

Application

Consumption

Consumption

Coverage rate: 3 ‐ 5 m²/litre

 
Application steps

APPLICATION

  • Sika® Rugasol® C Extra is supplied as a ready to use liquid and should not be diluted
  • Immediately after the initial bleed water has disappeared from the concrete, and before setting has commenced, Sika® Rugasol® C Extra should be applied to the surface using a garden sprayer (or similar). It is important that a uniform rate of coverage is achieved.

Removal:

As soon as possible after initial cure of the concrete has taken place the soft cement laitance on the surface can be washed and brushed away to reveal a good clean exposed aggregate finish.

NOTE: The depth of the exposure can vary depending on the cement content of the concrete, ambient air temperature, the amount of Sika® Rugasol® C Extra applied and the time it is left on the concrete before removal.

Cleaning:

Spray equipment should be washed out immediately after use with warm water. Sika® Rugasol® C Extra may stain some surfaces such as paintwork and should be removed immediately.

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