Product Data Sheet Safety Data Sheet Show all documents

Sika FastFix®-125

Rapid set high strength cementitious concrete-repair compound

Sika FastFix®-125 is a one-part pre-packaged concrete mix to which water is added on site. It is based on a blend of inorganic cements, modifying additives to control rate of setting and strength gain, and pre-graded aggregates which provide a non-segregating durable concrete mix. It does not contain calcium chloride. The special blend of cements minimizes shrinkage and reduces stress at the bond line.

  • Rapid set minimises operational disruption.
  • Low internal stress and intimacy of surface contact ensures excellent bond to concrete substrate.
  • Shrinkage controlled: minimizes risk of cracking or debonding.
  • Quality controlled pre-packaged material eliminates site batching variations.
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Product Data Sheet Safety Data Sheet Show all documents

Usage

For the emergency reinstatement of localised patches in concrete pavements, airport aprons, access ramps, roadways and many industrial situations such as gangways and warehouse floors. Sika FastFix®-125 is designed for large volume repair work in voids of a minimum depth of 15 mm.  

Advantages

  • Rapid set minimises operational disruption.
  • Low internal stress and intimacy of surface contact ensures excellent bond to concrete substrate.
  • Shrinkage controlled: minimizes risk of cracking or debonding.
  • Quality controlled pre-packaged material eliminates site batching variations.

Packaging

25 kg bags

Colour

Grey/brown powder

Product Details

Product Information

Shelf Life

Twelve (12) months from date of production if stored correctly.

Storage Conditions

Store properly in original unopened, sealed and undamaged packaging in dry conditions at temperatures between +5ºC and +30ºC.
Technical Information

Compressive Strength

Temp.

2 Hours

24 Hours

28 Days

20°C

28 MPa

40 MPa

>50 MPa

Application

Application Information

Setting Time

Working Time

Initial Set

Final Set

30 minutes

45 minutes

50 minutes
Consumption

Yield

Sika FastFix®-125 will yield 12 litres of mix per 25 kg bag
Application steps

MIXING

  • Sika FastFix®-125 must be mixed in a forced action pan mixer or similar type of mixer. A free fall mortar or concrete mixer may not be suitable.
  • Always add powder to water.
  • 3-5 minutes mixing will generally be sufficient.
  • The water requirement will be 2.3 - 2.4 litres per 25 kg bag of Sika FastFix®-125. Maximum water addition is 2.4 litres per 25 kg bag.
  • The mix will appear very dry at the start of mixing. Do not add extra water, as it will become more fluid after 2 to 3 minutes of mixing.
  • Do not mix for longer than necessary or delay in using the mixed material, otherwise the available working life will be reduced.
  • Only that quantity of Sika FastFix®-125 which can be placed well within its working life should be mixed at any one time.
  • The residue of a previously mixed batch left in the mixer will accelerate the setting rate of the subsequent batch, thus reducing the working life available for placement.

APPLICATION

  • Apply the mixed material firmly and evenly over the primed surface and tamp with a wood float to achieve complete compaction.
  • Strike off the surface to the correct level and finish with a steel trowel to ensure that a fully closed surface is obtained.
  • If a textured finish is required this can be achieved by rolling the trowelled surface with a suitably profiled light roller.

CURING TREATMENT

  • Sika FastFix®-125 requires curing in accordance with good concreting practice. We recommend the use of Sika Antisol curing membranes for this purpose. (Refer to Sika Antisol data sheet for further information.)
  • Where the repair is to be subsequently covered by a floor coating or screed, the curing compound should be carefully selected to ensure compatibility.
  • In winter the finished surface should be protected against frost for the first 3 days by the use of insulated covers.

CLEANING

Sika FastFix®-125 should be removed from tools immediately after use with clean water. Cured material can only be removed mechanically.

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