28/04/2026

SikaFume®-300 is an ultra fine, pozzolanic additive that significantly enhances the density, durability, and chemical resistance of concrete and mortar. Due to its extremely fine particle size, it substantially improves the microstructure and increases concrete strength development, ranging from high early strength to ultra high performance concrete (UHPC).

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Areas of application​​​​​​

SikaFume®-300 is suitable for use in dry mortar systems such as injection mortars and concretes, dry sprayed mortars and concretes, grouting, repair, and jointing mortars, as well as for applications in the refractory industry.

Benefits of SikaFume®-300

Optimized bonding & improved microstructure​​​​​

  • Maximum adhesive bond, compacted contact zone and a more homogeneous microstructure 
  • Additional strength development due to the early formation of supplementary C–S–H phases resulting from high pozzolanic reactivity


High strength & durability

  • Exceptional strength resulting from a dense concrete matrix enabled by particles approximately 100 times finer than cement
  • Extremely low water and gas permeability


Enhanced durability & service life

  • Significantly reduced chloride penetrationImproved resistance to freeze–thaw cycling, sulfate attack, chemical exposure and abrasion


More sustainable formulations with a lower carbon footprint​​​​​​

  • Contributing to resource-efficient and sustainable concrete systems by reducing the use of Portland cement
     

Certified quality

  • CE marking in accordance with EN 13263-1 (silica fume as a concrete admixture)
Get the Product Data Sheet of SikaFume®-300
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