Home » Solution » Gypsum/Plaster

Gypsum/Plaster

In the proportioning of building mortar, gypsum, as one of the commonly used cementitious materials, is widely applied in various construction scenarios such as leveling, plastering, self-leveling and interior wall plastering. However, gypsum materials themselves have problems such as short setting time, easy cracking, poor fluidity and easy delamination. Therefore, adding an appropriate amount of functional admixtures becomes particularly crucial.
Cellulose, especially hydroxypropyl methyl cellulose (HPMC) and hydroxyethyl methyl cellulose (HEMC), is widely used in gypsum-based products and is one of the most mature gypsum admixtures on the current market.

Improved Water Retention:

Gypsum slurry itself has poor water retention and is prone to rapid water loss under high temperatures or in well-ventilated environments, leading to cracking and decreased strength. Cellulose ethers form a moist protective film within the slurry, effectively delaying water evaporation and ensuring full hydration of the gypsum, thereby reducing the risk of cracking and peeling, and improving final strength.

Improved Workability (Thickening and Anti-Sagging):

Cellulose ethers significantly increase the consistency and viscosity of gypsum slurry, giving it good thixotropic properties. This makes it easier to apply and less prone to sagging or peeling, making it particularly suitable for thin-layer plastering and puttying.

Enhanced Adhesion:

Cellulose ethers improve the adhesion strength between gypsum slurry and the substrate (such as walls and gypsum board), allowing the material to adhere more firmly to the base and reducing hollow areas and peeling.

Improved Homogeneity and Flowability:

In gypsum self-leveling mortar, cellulose ethers help maintain a homogeneous slurry, preventing segregation, while providing suitable flowability for smoother application and a smoother surface.

Retarding Effect:

Cellulose ethers can appropriately extend the setting time of gypsum, providing a longer working window, especially important in high-temperature environments or for large-area applications.

Air Entraining and Foam Stabilizing Effect:

Some cellulose ethers have a slight air-entraining effect, introducing micro-bubbles into the slurry, increasing bulk density, improving thermal insulation performance and workability. However, the dosage must be controlled to avoid excessive strength reduction

Shandong Shengda Flexible OEM Partner.jpg

Top 10 Methyl Ethyl Hydroxyethyl Cellulose Manufacturers in China (2026 Updated Expert Selection Guide)

This expert guide identifies 10 leading Methyl Ethyl Hydroxyethyl Cellulose (HEMC) manufacturers in China for construction and daily chemical applications, explaining selection criteria, certifications, capacity, OEM/ODM strengths, and practical risk‑control steps for global procurement managers.

10 June 2026

Premium HPMC Factory in China: Expert Guide To Hydroxypropyl Methyl Cellulose for Construction And Daily Chemicals

Premium HPMC from Shandong Shengda New Material in China for construction and daily chemical applications. Learn how hydroxypropyl methyl cellulose improves water retention, workability, and sustainability, and get expert tips for selecting the right grade for your formulations.

07 June 2026

Global Cellulose Ether Supplier Partnership.png

Cellulose Ether HPMC HEMC And HEC For Construction And Daily Chemical Applications

Cellulose ether guide from a construction and daily‑chemical expert’s perspective. Understand how HPMC, HEMC and HEC are produced, how they differ, and how to select the right grade for mortars, tile adhesives, paints and personal care products.

08 June 2026

High Strength Precision Grout Overview.jpg

HPMC Vs HEMC for High-Strength Grout: Ensuring Zero Shrinkage in Precision Grouting

Compare HPMC vs HEMC for high‑strength, zero‑shrinkage precision grouts. Learn how each cellulose ether affects water retention, rheology, temperature stability, and field performance, and discover a practical framework for selecting the right additive for your project.

09 June 2026

Global Technical Support For Cellulose Ethers.jpg

Construction Grade HPMC Vs HEMC: Comparing Longevity in Extreme Freeze-Thaw Cycles

Discover how construction grade HPMC and HEMC perform under extreme freeze-thaw cycles. Learn the science behind their durability, see expert use cases, and get a practical selection guide for cold-climate mortars and ETICS systems.

11 June 2026

Shandong Shengda HEC OEM Collaboration.png

Top 10 Cellulose HEC Manufacturers in China (2026 Updated: Expert Selection Guide)

This 2026 expert guide profiles the top 10 cellulose HEC manufacturers in China and explains how professional buyers should evaluate suppliers. It covers technical criteria, compliance, common pitfalls and practical steps to secure reliable, scalable HEC partnerships.

12 June 2026

Gypsum/Plaster

Telephone

Email

Products

Solution

Support

About

Contact Us for Your Needs