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Longou Chem is a leading manufacturer of cellulose ethers (HPMC, HEMC, HEC), redispersible polymer powders, and specialty additives for drymix mortars, coatings, and building materials. Trusted by global partners for over 16 years.
16+
Years Experience
100+
Employees
20%
Masters/PhD
A trusted manufacturer and application solutions provider in the construction chemicals industry, committed to innovation, quality, and global customer support.
Longou International Business (Shanghai) Co., Ltd. was established in 2007 and is headquartered in Shanghai, China. We are a construction chemicals additives manufacturer and application solutions provider, committed to delivering high-performance materials to global customers.
We specialize in the R&D, production, and sales of key additives such as cellulose ethers (HPMC, HEMC, HEC) and redispersible polymer powders used in drymix mortars, tile adhesives, putties, coatings, and self-leveling compounds.
With over 100 employees, more than 20% hold master’s or doctoral degrees in chemistry, materials science, and engineering. Our technical team ensures product excellence and customized application support.
High-performance chemical additives engineered for durability, workability, and water retention in construction and industrial applications.
High-purity cellulose ether for tile adhesives, putties, and self-leveling mortars. Excellent water retention and thickening properties.
Water-soluble polymer used as thickener and adhesive. Ideal for gypsum-based and cementitious systems requiring high water retention.
Cellulose ether-based agent that enhances workability and prevents premature drying in cementitious systems.
VAE-based powder (ADHES® AP2080) for tile adhesives and flexible mortars. Enhances bonding strength and flexibility.
Non-ionic cellulose ether used in coatings, detergents, and construction materials for thickening and stabilization.
Reinforcing fiber for sprayed mortars, renders, and insulation systems. Improves crack resistance and workability.
High-range water reducer for concrete and self-leveling compounds. Enables low water-cement ratios and high flowability.
Engineered HEMC variants with enhanced performance for specific formulations in putties and flexible mortars.
Our additives are formulated to meet the demanding requirements of modern construction and industrial processes.
HPMC and RDP enhance adhesion, water retention, and flexibility in tile adhesives and grouts.
HEC and HEMC provide viscosity control, sag resistance, and improved application in water-based paints.
RDP and cellulose fibers improve bonding, flexibility, and crack resistance in EIFS systems.
Superplasticizers and HPMC ensure flowability, stability, and controlled setting in floor compounds.
16+
Years in Industry
100+
Employees
50+
Global Markets
20%
R&D Team
HPMC (Hydroxypropyl Methyl Cellulose) is used as a water retention agent, thickener, and binder in drymix mortars, tile adhesives, putties, and self-leveling compounds to improve workability and prevent cracking.
Redispersible Polymer Powder enhances adhesion, flexibility, and water resistance in cementitious systems. It improves bond strength and reduces brittleness in tile adhesives and renders.
HPMC offers higher water retention and is ideal for cement-based systems. HEMC provides better enzymatic resistance and is preferred in gypsum-based formulations and high-temperature applications.
Yes, we offer customized formulations based on viscosity, particle size, and performance requirements for specific applications and regional standards.
For inquiries about our products, technical support, or pricing, please visit our official website.
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