MAS Microballoons Quart
When mixed with your epoxy Phenolic Microballoons can be used as a fairing or filleting compound. These microballoons are a low density, light weight, sandable filler for use with your epoxy resin and hardener of choice.
Phenolic Micro Balloons (organic phenolic hollow spheres) For use when low density, light weight sandable paint-ready surfaces are required, i.e. when fairing.