White microballoons (Glass Bubbles)

White microballoons (Glass Bubbles)
White microballoons (Glass Bubbles)
  • Lightweight filler for epoxy
  • Easy to sand
  • Can be mixed with polyurethane

White glass microspheres or glass bubbles are used to make easy-to-use sanding pastes. As a basic recipe, a mixture of 1 part white microballoons and 1 part red microballoons can be mixed (depending on the volume).

Glass bubbles can also be added to PU resin or other casting resins to make them lighter. Before painting, microballoons should be coated with another layer of epoxy.


Specific weight: 0.10-0.20 gr/cc
Dosage: 10% for castings, 15% for adhesives and 25% for putties.


  • 0.2 kg (approx. 2.5 litres)
  • 1 kg (approx. 10 litres)
  • 12.5 kg (bag)



We have a number of recommendations for working safely with polymers. At Polyestershoppen you will not only find the polymers themselves, but you can also purchase all the protective equipment you need from us. If you have any doubts or questions, please contact our customer service. We can give you advice on how to work safely with polymers.

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