I can't imagine it would hurt a blender. Aerosil is an extremely fluffy, almost airy, material that has some interesting physical properties on its own. It's di

I can't imagine it would hurt a blender. Aerosil is an extremely fluffy, almost airy, material that has some interesting physical properties on its own. It's dirt cheap to buy (around $6 a gallon - http://www.uscomposites.com/fillers.html http://www.uscomposites.com/fillers.html). I use it fairly regularly - it's a thixotropic agent for epoxy resins.