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Premium HPMC & RDP
For Global Industries

High-performance Hydroxypropyl Methyl Cellulose (HPMC) and Redispersible Polymer Powder (RDP) for construction, coatings, detergents, and specialty applications. Trusted by manufacturers worldwide.

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HPMC Powder

Construction Grade HPMC

Enhances water retention, workability, and adhesion in mortars, putties, and tile adhesives.

RDP Powder

Redispersible Polymer Powder (RDP)

Improves flexibility, bond strength, and crack resistance in cementitious systems.

Industrial Packaging

Global Supply Chain

Reliable export network serving over 50 countries with consistent quality and on-time delivery.

Factory and Laboratory

About TopHPMC

Jinzhou City Honghai Cellulose Co., Ltd., operating as TopHPMC, is a leading manufacturer of Hydroxypropyl Methyl Cellulose (HPMC) and Redispersible Polymer Powder (RDP) based in Hebei Province, China. With years of expertise in cellulose ether production, we deliver high-purity, consistent-performance additives for construction, coatings, and industrial applications.

Our products are engineered to meet international standards, offering superior water retention, thickening, and binding properties. We serve clients across Asia, Europe, Africa, and South America, supporting innovation in building materials and specialty chemicals.

  • ISO-Certified Manufacturing
  • R&D-Driven Product Development
  • Strict Quality Control & Testing
  • Global Export Experience

Our Product Range

Engineered for performance, consistency, and compatibility across diverse industrial applications.

HPMC for Putty

HPMC for Putty

Improves workability, water retention, and adhesion in interior and exterior wall putties.

  • Viscosity: 40,000–100,000 mPa·s
  • High water retention & film formation
  • Excellent sag resistance
HPMC for Cement Mortar

HPMC for Cement Mortar

Enhances cohesion, pumpability, and open time in repair mortars and rendering mixes.

  • Optimized for high-alkaline environments
  • Viscosity: 20,000–60,000 mPa·s
  • Excellent water retention
HPMC for Tile Adhesive

HPMC for Tile Adhesive

Ensures strong adhesion, extended workability, and reduced slippage on vertical surfaces.

  • Viscosity: 30,000–80,000 mPa·s
  • High bond strength
  • Improved sag resistance
HPMC for Coating

HPMC for Coating

Acts as thickener and stabilizer in decorative and functional wall coatings.

  • Smooth application & anti-sag
  • Viscosity: 15,000–50,000 mPa·s
  • Good compatibility with pigments
HPMC for Self-Leveling

HPMC for Self-Leveling

Controls flow, prevents segregation, and improves surface finish in floor compounds.

  • Low viscosity, high purity
  • Excellent flow & deaeration
  • Viscosity: 4,000–15,000 mPa·s
HPMC for Gypsum

HPMC for Gypsum

Improves workability and water retention in gypsum plasters and boards.

  • Compatible with gypsum setting
  • Viscosity: 20,000–60,000 mPa·s
  • Reduces cracking
Detergent Grade HPMC

Detergent Grade HPMC

Used as thickener and stabilizer in liquid detergents and cleaning formulations.

  • High solubility in cold water
  • Viscosity: 1,000–10,000 mPa·s
  • Excellent suspension properties
Redispersible Polymer Powder (RDP)

Redispersible Polymer Powder (RDP)

Enhances flexibility, adhesion, and durability in cement-based and gypsum systems.

  • Vinyl acetate-ethylene copolymer
  • Redispersibility: >95%
  • Improves impact resistance
View Full Product Catalog

Why Choose TopHPMC?

We combine advanced technology, rigorous quality control, and customer-focused service to deliver unmatched value.

High Purity

Our HPMC and RDP are produced under strict controls to ensure minimal impurities and consistent performance.

Wide Viscosity Range

From low-viscosity for self-leveling to ultra-high for putties, we offer tailored solutions.

Global Support

Dedicated technical support and logistics team to assist with product selection and delivery.

Quality Assurance

Every batch undergoes rigorous testing for viscosity, water retention, ash content, and pH.

50+
Countries Served
15,000+
Tons Annual Capacity
10+
Years of Experience
99.8%
Customer Satisfaction

Frequently Asked Questions

Find answers to common inquiries about our products and services.

What is HPMC used for in construction?

HPMC improves water retention, workability, adhesion, and sag resistance in putties, mortars, tile adhesives, and coatings. It prevents premature drying and enhances bond strength.

How do I dissolve HPMC properly?

Use cold water with high-shear mixing. Pre-disperse in a non-solvent (like alcohol) or use a vortex mixer to prevent lumping. Allow 15–30 minutes for full hydration.

What is the difference between HPMC and HEMC?

HPMC (Hydroxypropyl Methyl Cellulose) has better thermal stability and water retention than HEMC (Hydroxyethyl Methyl Cellulose), which offers higher solubility in hot water.

Why add HPMC to mortar?

HPMC prevents water loss to the substrate, improves workability, extends open time, and enhances adhesion and cohesion, leading to stronger, crack-resistant finishes.

What packaging options do you offer?

We offer 20kg or 25kg multi-layer paper bags with inner plastic liners. Custom packaging is available upon request.

Get in Touch

For product inquiries, technical support, or samples, visit our official website to connect with our team.

Email: [email protected]
Phone: +86031183782888
Address: Mayuyuan, Economic Development Zone, Jinzhou City, Shijiazhuang City, Hebei Province, China

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