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

Different HPMC Grades And Their Corresponding Application: A Practical Guide for Construction And Daily Chemical Formulators

Hydroxypropyl Methyl Cellulose (HPMC) grade selection directly affects viscosity, water retention, film formation, and end-use performance. This guide explains different HPMC grades and their applications from a manufacturer’s perspective, helping formulators choose the right grade with confidence.

10 July 2026

Different HPMC Grades And Their Corresponding Applications: A Practical Guide for Construction And Daily Chemical Formulators

Discover how different HPMC grades affect performance in construction and daily chemical applications. This expert guide explains viscosity, water retention, grade selection, and practical uses to help formulators choose the right cellulose ether for better results.

09 July 2026

HPMC Factory Premium Hydroxypropyl Methyl Cellulose: Choosing The Right Cellulose Ether for Industrial Performance

This article introduces HPMC factory premium hydroxypropyl methyl cellulose from a manufacturer’s perspective, explaining product performance, quality control, application differences, and supplier selection tips for construction and daily chemical buyers.

08 July 2026

Hydroxyethyl Cellulose in Water-Based Paints: How HEC Improves Viscosity, Stability, And Application Performance

Hydroxyethyl Cellulose (HEC) is a key rheology modifier for water-based paints. This article explains how HEC improves viscosity, sag resistance, pigment suspension, and application performance, while offering practical formulation tips, industry insights, FAQs, and buyer guidance.

07 July 2026

What Are The Functions of Cellulose Ethers? A Practical Guide To HPMC And Its Industrial Value

This article explains the functions of cellulose ethers and HPMC from a manufacturer’s and industry expert’s perspective. It covers core benefits, application differences, grade selection, sustainability trends, and practical buying advice, while improving SEO, readability, and user trust.

06 July 2026

Construction Grade HPMC Performance Overview.jpg

HPMC Properties And Applications: A Complete Guide To Hydroxypropyl Methyl Cellulose for Construction And Personal Care

Hydroxypropyl Methyl Cellulose (HPMC) is one of the most versatile cellulose ethers used today. In construction, it improves water retention, workability, and open time; in personal care and daily chemical products, it helps control viscosity, stabilize formulas, and create a smoother user experienc

05 July 2026

Gypsum/Plaster

Telephone

Email

Products

Solution

Support

About

Contact Us for Your Needs