Pyrolite is no longer produced! See DIRT FX for a substitute for Pyrolite and Fuller’s Earth (SDS available).
Pyrolite is no longer produced but was a healthier but not a risk-free substitute for Fuller’s Earth. Primarily used by special effects companies for a multitude of purposes like adding to low powered explosives to create a much larger looking explosion as in rocket strikes or hand grenades, for use in emphasizing dirt roads when driven over by a vehicle, for use in aging a set by applying thin layers with a flour sifter on wood furniture and floors, or turning a city street into an unpaved road.
See DIRT FX for a substitute for Pyrolite and Fuller’s Earth (SDS available).