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Glass Bubbles

Hollow glass microspheres with a high strength to density ratio. Lightweight but with a strength for processing survival. Potential enhancements include high filler loading, reduced warpage/shrinkage, sandability and more.

3M glass bubbles offer a variety of benefits to light weight, high-build elastomeric roof coatings, anti-condensation coatings. With their low density and high strength makes them ideal polymer additives for automotive, truck and aerospace components.


  • Spherical shape
  • Average particle sizes range from 17 to 65 microns, and s.g. 0.6 to 0.12.
  • Made from specially formulated glass.


  • Low resin demand
  • Low thermal conductivity
  • High strength to weight ratio
  • Chemically stable glass.


  • Lower viscosity
  • Improved flow
  • Weight reduction
  • Survives processing
  • Easy to disperse
  • Can increase insulative properties.

Typical Applications

  • Paints & Coatings
  • Injection Moulded & Extruded Polymers
  • Building Chemicals
  • Cast Urethane
  • Potting Compounds
  • Spray-up/Lay-up.

Document Downloads

3M™ Microspheres Selection Guide (pdf, 339kb)

Glass Bubbles K and S Series Product Information (pdf, 113kb)

3M™ Glass Microspheres Floated Product Series Product Information (pdf, 36kb)

3M™ Glass Bubbles - Cryogenic Applications Brochure (pdf, 493kb)

Microsphere Application Guide (pdf, 863kb)

Glass Bubbles for Resin Systems Information (pdf, 1099kb)

To discuss how you can benefit from using 3M Glass Bubbles contact us today.

Buy your sample now from 3M Direct Select



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