China Clay, Calcined (Kaolin)

Calcined china clay (kaolin) is a naturally occurring aluminium silicate clay mineral that has been heat-processed (calcined) to alter its physical properties. In automotive products it functions as a mild polishing agent and filler, providing texture and mild abrasive action in liquid waxes, glazes, and polishes. The calcination process increases its hardness slightly compared to uncalcined kaolin. The primary concern with industrial kaolin dust inhalation (silicosis) does not apply to sealed formulations. At the concentrations used in detailing products (1–10%), this is an inert mineral ingredient.