Hollow purple/brown microscopic phenolic spheres used for making easy to sand light weight compounds. They can be mixed with polyester or epoxy resins. They may also be combined with other filler/fibers for additional properties. The plastic microspheres will not crush like glass bubbles, but will flatten out. They are not recommended for making compounds intended for gluing.
4 oz, 8 oz, 1 lb, 5 lb