Premium Construction Chemical Additives Manufacturer
Longou International – trusted global supplier of HPMC, HEMC, Redispersible Polymer Powder, and advanced building material solutions since 2007.
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Longou International – trusted global supplier of HPMC, HEMC, Redispersible Polymer Powder, and advanced building material solutions since 2007.
A leader in construction chemicals innovation and application solutions
Longou International Business (Shanghai) Co., Ltd. has been a trusted name in construction chemicals for over 16 years.
Specializing in cellulose ethers and redispersible polymer powders with advanced production facilities.
Over 100 employees, with more than 20% holding master's or doctoral degrees in chemical engineering.
Longou International is a construction chemicals additives manufacturer and application solutions provider, committed to delivering high-performance construction materials to customers worldwide. We focus on research, development, production, and sales of key additives such as Hydroxypropyl Methyl Cellulose (HPMC), Hydroxyethyl Methyl Cellulose (HEMC), and Redispersible Polymer Powders (RDP) for the drymix mortar and building materials industry.
Our products are engineered to enhance water retention, adhesion, flexibility, and durability in tile adhesives, putties, plasters, self-leveling compounds, and more. With a strong technical team and global distribution network, we support customers in over 60 countries with reliable supply and expert formulation guidance.
Learn more about our history and technology →High-performance chemical additives for construction and industrial applications
High water retention, excellent thickening, and improved workability for tile adhesives, putties, and mortars.
Rigid type with high bond strength, ideal for tile adhesives and cement-based mortars.
Superior water retention and thickening for gypsum and cement-based drymix mortars.
High-quality VAE powder for construction drymix mortar with excellent flexibility.
High-efficiency water reducer for concrete and self-leveling compounds.
Reinforcing fiber for mortars, plasters, and renders to reduce cracking.
High-range water reducer for concrete with excellent dispersion properties.
Protects masonry, concrete, and façades from water ingress and weathering.
Our additives enhance performance across diverse construction and industrial uses
HPMC and RDP improve adhesion, sag resistance, and water retention in tile adhesives.
HEMC and HPMC act as thickeners and stabilizers in water-based coatings and emulsions.
RDP and cellulose fibers enhance flexibility, bonding, and crack resistance in EIFS.
HPMC and superplasticizers ensure flowability, stability, and rapid strength gain.
For inquiries about our products, pricing, or technical support, please visit our official website.
Phone: +86 393 6905188
Email: andy@longoucell.com
Rm3301, Building 1, No. 700 Liquan Road, Putuo District, Shanghai, China
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