Cellosize QP-52000H Hydroxyethyl cellulose Dow Chemical Rheology Modifier/ Thickener >> Cellulosic, non associative >> Hydroxyethyl cellulose (HEC) Coatings >> Waterborne Architectural / Decorative General Industrial /Maintenance Soluble in hot or cold water CELLOSIZE™ QP-52000H hydroxyethyl cellulose (HEC) is a high molecular weight cellulosic polymer used as a general thickener for water-borne systems including latex paints, personal care products, household cleaning products, and tape-joint compounds. paints and coatings High molecular weight cellulosic polymer. Used as a general thickener for water-borne systems including latex paints.