Wilklay RP-80 Kaolin clay Wilkinson Kaolin Extenders / Fillers >> Kaolin Rubber - Elastomer (Chloroprene, Butyl …) ADHESIVE >> Water-based Wilklay RP-80 is a high brightness, finely pulverized, air-float kaolin clay with properties specifically selected for the coatings, adhesives, rubber and other polymer industries. It features intermediate viscosities in aqueous systems. High brightness, finely pulverized, air-float kaolin clay. Used in adhesives, rubber and other polymer industries. Provides intermediate viscosities in aqueous systems.