Application
• HPMC (Hydroxypropyl Methylcellulose)
• MHEC / HEMC (Methyl Hydroxyethyl Cellulose / Hydroxyethyl Methylcellulose)
Gypsum plaster, also known as plaster of Paris or interior wall plaster, is widely used as a finishing material for ceilings and internal walls. It offers a smooth, decorative surface with excellent fire resistance and sound insulation properties. For optimal performance and easy application, modern gypsum-based plasters are formulated with high-quality cellulose ethers like HPMC and MHEC.
At Hehui Chemical, we supply high-purity HPMC and MHEC grades designed specifically for gypsum systems. Our cellulose ethers enhance every stage of application — from mixing and spreading to setting and final finish — ensuring a stable, crack-free, and long-lasting plaster layer.
Improved Water Retention
Keeps moisture in the plaster mix longer, supporting full gypsum hydration, reducing cracking, and improving final hardness.
Enhanced Workability
Provides a smooth, creamy texture that is easier to apply and spread on walls and ceilings, reducing labor effort.
Extended Open Time & Better Finish
Slows down setting to give applicators more working time, ensuring uniform surface coverage and fewer surface defects.
Thick Layer Stability & Anti-Sagging
Maintains paste stability, even in thicker applications or on vertical surfaces, preventing sagging or detachment.
Surface Smoothness & Shrinkage Control
Minimizes air entrainment and surface pinholes while reducing shrinkage during drying, resulting in a premium finish.
Excellent compatibility with gypsum and lime-based systems
High-purity HPMC & MHEC with stable viscosity performance
Custom grades available for fast-setting or slow-setting gypsum
Helps control water demand, improving yield and cost-efficiency
Manufactured in ISO-certified plants with consistent quality control
Type (HPMC/HEMC): Choose HPMC or HEMC, as they provide the best water retention and workability in gypsum plaster.
Viscosity: Select medium to high viscosity depending on the required sag resistance and troweling feel, and always confirm the supplier’s viscosity test method.
Dosage: Start with 0.10%–0.30% of total dry mix to adjust water retention and open time without excessive retardation.
Setting-Time Impact: Ensure the cellulose ether does not delay gypsum setting beyond your required open time.
Water Retention: Choose grades specifically tested in gypsum systems to prevent cracking and maintain surface quality.
Compatibility: Verify that the product works well with your retarders, accelerators, fillers, and other gypsum additives.
Dispersion & Particle Size: Select a grade with good dry-mix dispersibility and appropriate particle size to avoid lumping and ensure uniform mixing.
Consistency & Quality: Check batch-to-batch stability in viscosity, moisture, pH, and ash content for predictable performance.
Packaging: 25kg kraft paper bags with moisture-resistant PE liner
Shelf Life: 24 months in dry, sealed packaging
Storage: Store in a dry, ventilated area; avoid direct moisture exposure
With decades of experience in cellulose ether production, Hehui Chemical supports gypsum plaster manufacturers worldwide with reliable HPMC and MHEC products. We offer technical guidance and customized solutions to help you create smooth, crack-resistant, and cost-effective plasters that meet market demands.
Let us help you enhance your gypsum plaster formulations — Contact Hehui Chemical today!
At Hehui Chemical, we offer tailor-made cellulose ether solutions to meet the specific needs of your gypsum plaster or other applications. Our customization capabilities include:
Viscosity Adjustment: HPMC, HEMC, or other cellulose ethers can be produced in medium to high viscosity grades to match your workability and sag resistance requirements.
Formula Matching: Send us your sample or target performance profile; our lab will analyze water retention, open time, setting behavior, and adhesion, then develop a matched or optimized formulation.
Packaging & Labeling: Flexible options including 25 kg bags, jumbo bags, or fully customized packaging with OEM or private labels.
Technical Support & Testing: Fast sample testing, performance comparison reports, and one-on-one guidance to help optimize your product and ensure consistent quality.
1. Hehui's cellulose ethers significantly improve water retention in gypsum plaster, ensuring slow drying and uniform hydration for a smooth, crack-free finish.
2. HPMC and HEMC enhance plaster workability and flow properties, allowing easy, lump-free application on walls and ceilings.
3. These additives increase adhesion strength and flexibility, minimizing shrinkage and enhancing durability of plastered surfaces.
4. Ideal for interior finishing applications demanding high-quality and long-lasting gypsum plaster.
1. Cellulose ether additives improve water retention and rheology in lightweight gypsum, maintaining workability despite reduced density.
2. HPMC enhances suspension stability, preventing segregation of lightweight aggregates during mixing and application.
3. These additives improve adhesion and crack resistance on lightweight gypsum panels and surfaces.
4. Perfect for producing lightweight gypsum products with excellent durability and ease of application.
1. Hehui's cellulose ethers optimize water retention and viscosity, enabling consistent spray application and reduced rebound loss.
2. They improve rheological properties for smooth, even coatings with minimal clogging in spray equipment.
3. Enhanced adhesion and flexibility reduce cracking and improve the long-term stability of sprayed gypsum layers.
4. Suitable for mechanized gypsum plastering processes in large-scale construction projects.
1. HPMC and HEMC improve water retention and extend open time in manually applied gypsum, offering greater control during troweling.
2. These cellulose ethers increase mortar cohesion and reduce segregation, ensuring uniform consistency for hand application.
3. Compared to spray-applied gypsum, manual application benefits from improved workability and flexibility, allowing detailed finishing and better adaptation to complex surfaces.
4. Ideal for renovation, repair, and smaller-scale projects where precision and control are required.
Hydroxypropyl Methylcellulose (HPMC) is a non-ionic, water-soluble polymer derived from natural cellulose. At Hehui Chemical, we manufacture high-purity HPMC designed to meet the demanding needs of dry mix mortars, water-based paints, and household detergent formulations.
MHEC, also known as HEMC (Hydroxyethyl Methylcellulose), is a versatile cellulose ether widely used in construction materials and water-based Paint &coatings. As a modified cellulose ether, MHEC offers excellent water retention, thickening, and rheology control properties, making it a vital ingredient in products like tile adhesives, dry mix mortars, wall putty, gypsum plaster, and waterborne paints.
Hehui Hydroxyethyl Cellulose HEC Powder is a non-ionic, water-soluble cellulose ether designed to deliver excellent thickening, stabilization, and water retention across a wide range of industries. Made from high-purity natural cellulose, our HEC is ideal for water-based formulations in paints, coatings, construction materials, personal care products, and oilfield chemicals.
Carboxymethyl Cellulose (CMC) is an anionic water-soluble polymer derived from refined cellulose. It is widely used as a thickener, stabilizer, binder, water retention agent, and film-forming agent.
Looking for customized CMC solutions for your industry?
Contact our technical team to find the right grade for your application.
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