We are closed for a short break from 12pm (GMT) 2nd February, and will be back in the office on the 10th February. Orders placed during this time will ship when we reopen.


Microballoons are tiny glass bubbles, that create an extremely lightweight filler when combined with resins and acrylic resins (such as Paraloid B-72). Micro-cellular, inert, non-toxic hollow glass particles.

Mixed with a 60-80% wt/vol Paraloid in acetone solution it can create a strong, conservation grade filler. Reasonable working time (ethanol can be added to the acetone solutionto delay setting but there is an enhanced toxicity). Can be shaped, sculpted and sanded. Takes a few days to cure to full strength.

Very fine particles (60 micron).

Please wear a respirator when using as particles easily become airborne due to their lightweight nature and tiny size. No specific hazards.

  • Guaranteed safe checkout