This is a Grade C-3 vermiculite. A premium, medium particle size meeting ASTM C516 Type 1, Grade 3 specifications. This grade is widely used as a component in growing media for professional growers, refractory, lightweight concrete, fire proofing and packaging. This is a screened product so dust is severely minimized. Average particle size is 1/16"-1/8". Unit weight: 5.6 - 6.7 lb/cf
Traits of vermiculite:
-Low thermal conductivity
-High water holding capacity
-Insolubility in both water and organic solvents.
Please Note: This product is asbestos free. We also sell this product as an insulation for folks building brick ovens, or for use in straw bale stucco construction.