Clay 1490 Attapulgite 8031-18-3 Whittaker Rheology Modifiers / Thickeners >> Organoclay >> Attapulgite ADHESIVE SEALANT Clay - Attapulgite (Technical Granular Grade Fullers Earth) Thixotropic aid Adhesives Attapulgite. Used as a rheology modifier in adhesives and sealants. Offers thixotropic effect.