CELLOSIZE™ QP-4400H Hydroxyethyl Cellulose (HEC) is a medium molecular weight cellulosic polymer useful for general thickening applications, and is used primarily as a latex paint thickener. The excellent rheological properties of CELLOSIZE™ QP-4400H HEC in solution make it an ideal thickener in premium quality latex paints, giving paints with good flow and leveling characteristics.