Knud Bro Allé 4
+45 44 84 37 56



Recommended to reduce weight and costs in any high thermal and mechanical manufacturing process.

Product Description

Ceramic microspheres are used in a variety of final application like exterior insulation full systems, IEFS, sparkles, mortars, self-levelling floor compounds, BMC, SMC, brake linings, fire resistant products, covering mould castings, anti-noising compounds, underbody car protection, and PVC plastic soles. Base formulations for many applications can be send .


Granudan has replaced the previous Omega -SPHERES W300 with a new high qaulity microfiller named CENOSPHERES IN 300 A90 – a reasonable priced ceramic microsphere as a functional lightweight filler. The product is of bright-grey colour. CENOSPHERES IN 300 A90 is specified through a very high thermal and mechanical stability. Cenospheres,are created in the inferno of coal-fired power plants. They replace mined minerals and resins, significantly lower production costs.

The early Greeks and Romans mined cenospheres from volcanoes to lighten their cathedrals and domes.


  • density reduction and therefore weight reduction in final products
  • reduced binder content. This leads to cost reduction
  • improvement of mechanical properties of the final product like impact strength
  • Increase in thermo-shock resistant and dimension stability
  • increase in thermal insulation properties
  • improvement in rheology and therefore easier application of the final product
  • CENOSPHERES IN 300 A90 are inflammable, chemical inert and temperature resistant up to 1400°C

Delivered in 25 kg. bags. Next-Day delivery.

Name​ ​IN 300 A90
Colour bright-grey​/braun
Density at 20 C. ​2.0-2.6 g/cm3
bulk density at 20 C. ​1000 kg/m3
pH-value​ 6-8
​Specific gravity g/ccm 0.70-0.80​
Moisture Content ​0,1%
Melting point oC 1200-1400​
particle size distribution µm ​above 300 μm: 0-1% / 106-300 μm: 74,95% / below 106 μm: 5-25%​
Chemical Composition by weight​​
SiO2 %​​ ​50 – 55%
​Al2O3 % 25 – 35%​
Fe2O3 %​ ​1-3%​
TiO2 %​ ​1-3%​
Mg0 <2​
Ca0 ​1-2%​