Wilklay RP-2 Kaolin clay Wilkinson Kaolin Extenders / Fillers >> Kaolin Rubber - Elastomer (Chloroprene, Butyl …) ADHESIVE >> Water-based Wilklay RP-2 is a high quality, finely pulverized, air-float kaolin clay with properties specifically selected for the coatings, adhesives, rubber and other polymer industries. It features high viscosities in aqueous systems and has intermediate reinforcing properties in rubber compounds High quality, finely pulverized, air-float kaolin clay. Used in adhesives, rubber and other polymer industries. Provides high viscosities in aqueous systems and intermediate reinforcing properties in rubber compounds.