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Perlite microspheres

Perlite microspheres

Imerys perlite microspheres are derived from thermally expanded volcanic rock. They are widely used in adhesive and sealants to impart weight reduction, improve insulation, mechanical strength and hardness.

Perlite is derived from naturally occuring volcanic glass which contains water in the particles that expands into steam to produce a foamed structure comprised of lightweight spheroids. Perlite microspheres can be used as they are - or after milling - in various adhesives, plastisols and sealants where lightweighting is key.


  • Lightweighting
  • Clarity enhancement
  • Chemical resistance
  • Hardness
  • Texturing
  • Thermal stability

Perlite microsphere are suited for use in:

  • Barrier sealants
  • High wear resistance adhesives
  • Silicone RTV sealants
  • Preformed gaskets

We offer a full range of custom formulation and technical and process support services to help you match the right mineral grade to your application requirement.

Please contact us, we will be only too happy to help

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Adhesives, Caulks & Sealants