--- title: "LANDU Construction Additives" url: https://lan-du.com/ description: "LANDU supplies HPMC, HEMC/MHEC, RDP and specialty additives for dry-mix mortar and construction materials. Explore products, request technical data and samples." author: "LANDU Technical Team" date_published: 2023-08-18T07:20:42+00:00 date_modified: 2026-11-12T05:17:38+00:00 language: en-US type: page generator: LemonX AEO 1.4.8 --- # LANDU Construction Additives ![LANDU laboratory cellulose ether testing](https://lan-du.com/wp-content/uploads/2026/06/DSC7861-1.jpg) # Cellulose Ether & Construction Additives Manufacturer in China LANDU manufactures and exports HPMC, HEMC/MHEC, HEC, CMC, redispersible polymer powder and construction additives, mainly for building materials such as tile adhesive, wall putty and dry-mix mortar, and also for paints, coatings and personal care. Factory-direct supply, with TDS, COA and samples on request. [Explore Products](https://lan-du.com/products/) ![Tile adhesive application](https://lan-du.com/wp-content/uploads/2025/09/Tile-Adhesives-1.jpg) ## Match the Right Additives to Your Building System. From tile adhesives to self-leveling compounds, each application needs specific workability and adhesion. Find the cellulose ethers and additives matched to your formulation. [Explore Applications](https://lan-du.com/applications/) ![LANDU factory environmental protection facility](https://lan-du.com/wp-content/uploads/2025/04/landu-factory-wall-putty-scaled.jpg) ## Reliable Manufacturing. Consistent Quality. From our production lines to your dry-mix formulations, LANDU’s factory-direct supply keeps quality stable from batch to batch. [Meet LANDU](https://lan-du.com/about-landu/) 01 / 03 - **20,000 MT**HPMC annual capacity - **15,000 MT**HEMC/MHEC annual capacity - **5,000 MT**HEC annual capacity - **60+**Countries supplied - **3**Production bases PRODUCTS ## HPMC, HEMC/MHEC, HEC, CMC & RDP Products From HPMC and HEMC/MHEC to HEC, CMC and redispersible polymer powder, our range covers the key additives that improve workability, water retention, adhesion and durability in construction materials, and thickening and rheology in paints, coatings and personal care. - [!\[LANDU HPMC hydroxypropyl methyl cellulose powder\](https://lan-du.com/wp-content/uploads/2025/10/LANDU-HPMC-Hydroxypropyl-Methyl-Cellulose.jpg) HPMC HPMCHydroxypropyl Methyl Cellulose. Delivers excellent water retention, workability, and open time for tile adhesives, skim coats, and dry-mix mortars.](https://lan-du.com/products/hydroxypropyl-methyl-cellulose/) - [!\[LANDU HEMC/MHEC hydroxyethyl methyl cellulose powder\](https://lan-du.com/wp-content/uploads/2026/11/LANDU-HEMC-Hydroxyethyl-Methyl-Cellulose.jpg) HEMC HEMC / MHECHydroxyethyl Methyl Cellulose. Offers stable thickening and strong sag resistance, ideal for gypsum plasters, renders, and machine-applied mortars.](https://lan-du.com/products/hydroxyethyl-methyl-cellulose/) - [!\[LANDU HEC hydroxyethyl cellulose powder\](https://lan-du.com/wp-content/uploads/2026/11/LANDU-HEC-Hydroxyethyl-Cellulose-powder.jpg) HEC HECHydroxyethyl Cellulose. Provides efficient thickening and smooth rheology for water-based paints, coatings, and putty formulations.](https://lan-du.com/products/hydroxyethyl-cellulose/) - [!\[LANDU sodium carboxymethyl cellulose CMC powder\](https://lan-du.com/wp-content/uploads/2026/11/LANDU-Sodium-Carboxymethyl-Cellulose-CMC-powder.jpg) CMC CMCCarboxymethyl Cellulose. Provides thickening, water retention and suspension in putty powder and interior wall materials, for smooth application and stable consistency.](https://lan-du.com/products/sodium-carboxymethyl-cellulose/) - [!\[LANDU VAE redispersible polymer powder RDP\](https://lan-du.com/wp-content/uploads/2026/11/LANDU-Redispersible-Polymer-Powder.jpg) RDP RDPRedispersible Polymer Powder. Improves bonding strength, flexibility, and crack resistance in tile adhesives, EIFS, and repair mortars.](https://lan-du.com/products/vae-rdp-powder/) NOVASTAR ADDITIVES ## Construction Additives for Dry-Mix Mortar NovaStar is LANDU’s range of functional additives for dry-mix mortar, putty and gypsum systems. From hydrophobic powder and defoamer to retarder, starch ether, PP fiber and PCE, each product helps improve workability, water resistance, crack resistance and setting control, with stable quality from batch to batch. [!\[Silicone hydrophobic powder for mortar and putty\](https://lan-du.com/wp-content/uploads/2026/07/SHP.jpg)](https://lan-du.com/products/silicone-hydrophobic-powder/) ### [Silicone Hydrophobic Powder](https://lan-du.com/products/silicone-hydrophobic-powder/) Gives mortar and putty long-lasting water repellency and lower water absorption, ideal for exterior wall finishes and waterproof mortar. [Get a Quote](https://lan-du.com/contact/) [!\[Powder defoamer for dry-mix mortar\](https://lan-du.com/wp-content/uploads/2026/07/Powder-Defoamer.jpg)](https://lan-du.com/products/powder-defoamer/) ### [Powder Defoamer](https://lan-du.com/products/powder-defoamer/) Quickly removes entrained air bubbles in dry-mix mortar, improving surface finish, density and strength of the hardened product. [Get a Quote](https://lan-du.com/contact/) [!\[Gypsum retarder for plaster and compounds\](https://lan-du.com/wp-content/uploads/2026/07/Gypsum-Retarder.jpg)](https://lan-du.com/products/gypsum-retarder/) ### [Gypsum Retarder](https://lan-du.com/products/gypsum-retarder/) Extends the setting time of gypsum-based plaster and compounds, giving longer working time and stable, controllable construction. [Get a Quote](https://lan-du.com/contact/) [!\[Hydroxypropyl starch ether HPS powder\](https://lan-du.com/wp-content/uploads/2026/11/LANDU-Hydroxypropyl-Starch-Ether-HPS.jpg)](https://lan-du.com/products/hydroxypropyl-starch-ether/) ### [Hydroxypropyl Starch Ether](https://lan-du.com/products/hydroxypropyl-starch-ether/) Improves anti-sag, thickening and workability in tile adhesive and putty, and works well together with cellulose ethers. [Get a Quote](https://lan-du.com/contact/) [!\[Polypropylene PP fiber for mortar and concrete\](https://lan-du.com/wp-content/uploads/2026/11/LANDU-Polypropylene-Fiber-PP-Fiber-chemical.jpg)](https://lan-du.com/products/polypropylene-fiber/) ### [Polypropylene Fiber](https://lan-du.com/products/polypropylene-fiber/) Reduces shrinkage cracks and improves toughness and impact resistance of mortar and concrete, for more durable surfaces. [Get a Quote](https://lan-du.com/contact/) [!\[Polycarboxylate superplasticizer PCE powder\](https://lan-du.com/wp-content/uploads/2026/11/LANDU-Polycarboxylate-Superplasticizer-powder-additive.jpg)](https://lan-du.com/products/polycarboxylate-superplasticizer/) ### [Polycarboxylate Superplasticizer](https://lan-du.com/products/polycarboxylate-superplasticizer/) PCE powder water reducer that improves flowability and strength of mortar while cutting water demand, ideal for self-leveling and high-performance dry-mix mortar. [Get a Quote](https://lan-du.com/contact/) Application ## Cellulose Ethers & Additives for Construction, Coatings and Personal Care From tile installation and exterior insulation to decorative paints and personal care formulations, our additives help mortars, putties, coatings and everyday products perform consistently. [!\[Tile adhesive application with HPMC\](https://lan-du.com/wp-content/uploads/2025/09/Tile-Adhesives-1.jpg)](https://lan-du.com/applications/tile-adhesive-additives/) ### [Tile Adhesive](https://lan-du.com/applications/tile-adhesive-additives/) Longer open time and strong adhesion for secure, lasting tile bonding. [!\[Self-leveling compound floor application\](https://lan-du.com/wp-content/uploads/2026/07/banner.jpg)](https://lan-du.com/applications/self-leveling-compound/) ### [Self-Leveling Compound](https://lan-du.com/applications/self-leveling-compound/) Smooth flow and stable viscosity for a flat, crack-free surface. [!\[Worker applying wall putty and skim coat\](https://lan-du.com/wp-content/uploads/2026/07/worker-in-white-gloves-performs-plastering-of-the-2025-02-12-05-08-32-utc.jpg)](https://lan-du.com/applications/wall-putty-additives/) ### [Wall Putty & Skim Coat](https://lan-du.com/applications/wall-putty-additives/) Better workability and water retention for easy application and a fine finish. [!\[Waterproof mortar applied on a bathroom floor\](https://lan-du.com/wp-content/uploads/2026/07/waterproofing-of-the-bathroom-floor-in-a-new-build-2025-01-08-23-53-29-utc-1.jpg)](https://lan-du.com/applications/waterproof-mortar/) ### [Waterproof Mortar](https://lan-du.com/applications/waterproof-mortar/) Enhanced flexibility and bonding for a dense, durable waterproof layer. [!\[EIFS / ETICS exterior insulation system\](https://lan-du.com/wp-content/uploads/2026/06/LANDU-EIFS-System.jpg)](https://lan-du.com/applications/eifs-etics-additives/) ### [EIFS / ETICS](https://lan-du.com/applications/eifs-etics-additives/) Strong adhesion and crack resistance for insulation systems built to withstand weather. [!\[Worker plastering walls with gypsum plaster and spatula\](https://lan-du.com/wp-content/uploads/2025/04/worker-plastering-walls-with-gypsum-plaster-and-spatula.jpg)](https://lan-du.com/applications/cement-render-additives/) ### [Plaster & Render](https://lan-du.com/applications/cement-render-additives/) Excellent sag resistance and water retention for smooth, uniform coverage. [!\[Dry-mix mortar being mixed in a bucket\](https://lan-du.com/wp-content/uploads/2026/07/cement-mix-in-bucket-for-masonry-plaster-2025-07-09-07-06-15-utc.jpg)](https://lan-du.com/applications/drymix-mortar/) ### [Dry-Mix Mortar](https://lan-du.com/applications/drymix-mortar/) Consistent mixing and reliable workability for every factory-blended batch. [!\[Painting interior walls with water-based paint\](https://lan-du.com/wp-content/uploads/2025/04/painting-walls-in-the-house.jpg)](https://lan-du.com/applications/paints-and-coatings/) ### [Paints & Coatings](https://lan-du.com/applications/paints-and-coatings/) Efficient thickening and smooth flow for even, brush-friendly application. #### More Applications - [Repair Mortar](https://lan-du.com/applications/repair-mortar/) - [PCE for Concrete](https://lan-du.com/applications/pce-for-concrete/) - [Gypsum Materials](https://lan-du.com/applications/gypsum-material/) - [Personal Care](https://lan-du.com/applications/beauty-and-personal-care/) - [Home Care & Cleaning](https://lan-du.com/applications/home-care/) - [Food Industry](https://lan-du.com/applications/food-industry/) Our Brands ## Three Brands, One Standard of Quality Each brand serves a different segment of the construction materials industry, backed by the same R&D, production and quality system. LANDERCOLL^® Cellulose Ethers Our core cellulose ether brand for dry-mix mortar, tile adhesive, putty and skim coat, delivering stable water retention, workability and open time. - Hydroxypropyl Methyl Cellulose (HPMC) - Hydroxyethyl Methyl Cellulose (HEMC/MHEC) - Sodium Carboxymethyl Cellulose (CMC) - Hydroxyethyl Cellulose (HEC) [View Cellulose Ethers →](https://lan-du.com/products/) NOVASTAR^™ Construction Additives A full range of functional additives that improve strength, water repellency, setting control and defoaming in modern mortar systems. - Polycarboxylate Superplasticizer - Silicone Hydrophobic Powder - Gypsum Retarder - Powder Defoamer - Hydroxypropyl Starch Ether - Polypropylene Fiber [View Construction Additives →](https://lan-du.com/products/) ACCURATE^™ Redispersible Polymer Powders RDP grades for different flexibility needs, improving adhesion, flexibility and water resistance of cement-based and gypsum-based mortars. - Flexible grade - Semi-flexible grade - Rigid grade - Hydrophobic grade [View RDP Powder →](https://lan-du.com/products/vae-rdp-powder/) ![LANDU cellulose ether factory with automated production and packaging lines](https://lan-du.com/wp-content/uploads/2026/11/landu-factory.jpg) Manufacturing ## Cellulose Ether Factory Built for Reliable, Consistent Supply **Automated production and packaging, built to deliver the same quality in every batch.** From material storage to final packing, our integrated manufacturing system keeps production stable and traceable. Every order is handled with the same standards, so you receive consistent products and dependable supply, shipment after shipment. [Send Your Inquiry](https://lan-du.com/contact/) R&D LABORATORY ## Tested Batch by Batch, Backed by Our Lab **Our laboratory is equipped to test key performance indicators such as viscosity, moisture content, particle size and water retention. Each production batch is sampled and checked against specification, so you receive consistent quality in every shipment. Test reports are available on request.** Every product is verified in our in-house laboratory before it leaves the factory. [Contact Our Technical Team](https://lan-du.com/contact/) ![LANDU laboratory testing equipment for viscosity and water retention](https://lan-du.com/wp-content/uploads/2026/07/DSC2405.jpg) ![LANDU ISO 9001 and other quality certification certificates](https://lan-du.com/wp-content/uploads/2025/07/LANDU-Certification.jpg) QUALITY & CERTIFICATIONS ## Quality You Can Trust, Standards You Can Verify Our commitment to quality, sustainability and regulatory compliance is reflected in internationally recognized standards and independent assessments. Our certifications: - **ISO 9001:2015:** Certified quality management. - **EcoVadis (Bronze):** Independent sustainability assessment. - **REACH:** Compliance documents available on request. Committed to every gram. ![LANDU team meeting customers at an international building materials exhibition](https://lan-du.com/wp-content/uploads/2026/10/微信图片_20260129171516_878_205-compressed.jpg) Trusted Worldwide ## Meet LANDU at International Building Material Exhibitions We regularly take part in international industry exhibitions, where we meet customers face to face, discuss their applications and share our latest product developments. These events help us understand market needs and build long-term partnerships with customers across different regions. [Send Your Inquiry](https://lan-du.com/contact/) ## Frequently Asked Questions [More Questions](https://lan-du.com/contact/) What products does LANDU manufacture? LANDU manufactures cellulose ethers (HPMC, HEMC/MHEC and HEC) and construction additives, including redispersible polymer powder (RDP), hydroxypropyl starch ether, polypropylene fiber, polycarboxylate superplasticizer (PCE), gypsum retarder, powder defoamer and silicone hydrophobic powder. Annual capacity is 20,000 MT for HPMC, 15,000 MT for HEMC/MHEC and 5,000 MT for HEC. Should I choose HPMC or HEMC/MHEC for tile adhesive? Both are used in tile adhesives. The right choice depends on your system class, application conditions and the open time, workability and water retention you need. Our technical team can recommend a starting grade from your formulation. See our guides on [HPMC vs HEMC](https://lan-du.com/blog/hpmc-vs-hemc/) and on [choosing HPMC for tile adhesive](https://lan-du.com/blog/how-to-choose-hpmc-for-tile-adhesive/). Can I get TDS, COA and samples before ordering? Yes. We provide TDS and COA on request, and samples are available for evaluation. Tell us the product, application and target properties, and we will confirm suitable grades, sample size and shipping arrangements. What quality certifications does LANDU hold? LANDU operates under an ISO 9001 quality management system and lists ISO 14001, ISO 45001 and EU REACH compliance. Certificate copies can be provided on request. Do you export, and what are the MOQ and lead time? We supply customers in more than 60 countries from three production bases. MOQ, packaging and lead time depend on the product and grade. Send us your product, application and expected quantity, and we will reply with a quotation and delivery plan. LET'S WORK TOGETHER ## Discuss Your Material Requirements with LANDU ### Looking for the right additives for your formulation? Whether you need product recommendations, technical information, grade selection or a quotation, our team is ready to help. ✓Direct communication with our sales team GET IN TOUCH ### How Would You Like to Connect? Choose your preferred contact method. [**Chat on WhatsApp**+86 180 4322 4403 →](https://wa.me/8618043224403?text=Hello%20LANDU%2C%20I%20would%20like%20to%20discuss%20your%20products.) [**Email Our Team**sales@landu-china.com →](mailto:sales@landu-china.com?subject=LANDU%20Product%20Inquiry) WhatsApp [+86 180 4322 4403](https://wa.me/8618043224403) Call Now [+86 180 4322 4403](tel:+8618043224403) Email Now [sales@landu-china.com](mailto:sales@landu-china.com?subject=LANDU%20Product%20Enquiry&body=Hello%20LANDU%2C%0A%0AProduct%20or%20grade%3A%20%0AApplication%3A%20%0ATechnical%20requirements%3A%20%0AEstimated%20quantity%3A%20%0ADestination%20country%3A%20%0ARequest%20(TDS%2C%20sample%20or%20quotation%29%3A%20%0A%0ABest%20regards%2C%0A)