sil-cell is a multicellular, expanded vulcanic rock.
This filler belongs to the family of aluminium silicates and consists mainly of spherical ("
honeycomb structure") as well as rodshaped and flaky particles. Thus, bond strengths and packing densities are higher than in usual hollow microspheres.
The different sil-cell types distinguish themselves by grain sizes, grain spreading, bulk weight, and the effectual density.
There are both untreated and surface treated types available - the latter being extemely hydrophobic.


  • Very low density (depending on type reaching from 0,18 – 0,30 g/cm<sup>3</sup>)
  • High whiteness, snow white
  • irregular, multicellular shape
  • freeflowing
  • inert
  • frost-resistant
  • resistant to temperature
  • resistant to chemicals
  • neutral in odour
  • environment-friendly
  • incombustibly
  • resistant to thermical shocks
  • dimensionally stable

Typical Applications

  • Light weight spackles
  • Lightweight plaster
  • Products made of polyester-, epoxid-, phenolic resin and polyurethane
  • Light- SMC und -BMC
  • Glass fiber (GRP)
  • Underseal and PVC-plastisoles
  • Structural colours and structured plasters
  • Mortar
  • Self-levelling screed
  • Heat insulation coating
  • Artifical marble
  • Anti-drumming mass
  • Refractory material
  • Adhesives
  • Sandwich Panels

Your Benefits

  • Reducement of density and hence weight savings of end products
  • Improvement of profitability due to reduction of the need for binders and resins
  • Good flow properties
  • Higher use of fillers
  • Improved head and noise protection
  • Reduction of shrinking
  • Improved results of flexural strengths and impact strenghts
  • Increased resistance to chemicals
  • Low water absorbtion
  • Increase of packing densities and bonding strenghts

Product Overview

ProdutGrain Sizes (µm)
sil-cell 35 BC5 – 145
sil-cell 32 BC5 – 300
hydrophobic Types
sil-cell 35/345 – 145
sil-cell Sil 325 – 300