Hollow purple/brown microscopic phenolic spheres, used for making easy to sand light weight compounds. Mix with polyester or epoxy resins. May be combined with other filler/fibers for additional properties. For example, use with fumed silica to prevent sagging. Not recommended for making compounds intended for gluing.

Composition: Phenolic resin (Phenol formaldehyde resin)
Size Range: 5-127µm
Appearance and Odor: Red brown powder, odorless
Solubility: Insoluble in water
Bulk Density: 0.104 g/cm3, max; 6.5 lb/ft3, max
Relative Density: 0.20-0.80 g/cm3
Average Hydrostatic Compressive Strength: 350psi
Tg, Glass Transition Temperature: 200-200˚C