Originally Posted by buracho
Microbaloons work very well as a filler when mixed with epoxy. It cures like plastic foam depending on how much you add to the epoxy.
A word of caution: Microbaloons are tiny glass beads, DO NOT INHALE THEM. Wear a mask as these can be as damaging as carbon fiber dust to your lungs.
I appreciate the warning about the glass beads. I understand how something like that can really hurt your lungs.
My wife now has an acute lung sensitivity issue after inhaling a powder residue left over from a Water/Sodium Saccharin solution. The sodium saccharin powder was very abrasive and caused lesions on her lungs. She was diagnosed by two different medical facilities as having RADS. They were able to help her with massive amount of steroids and pure oxygen. She still gets into a coughing fit triggered by just about anything she smells or breaths in.
All I can say is protect your lungs anytime your are cutting, gluing, burning, grinding, etc, etc.