Hydroxypropyl Methyl Cellulose (HPMC) is highly pure cotton cellulose as raw materials, under the condition of alkaline specially made by etherification. It helps building materials apply more easily and perform better. They provide water retention and cohesiveness to mixtures. With special modification, it can be used to control thickening, water demand, workability, sag resistance, strength and other important properties of the final product. your first choice for production of high quality building materials additives.To meet the needs of environmental protection.