
Moisture-Resistant Gypsum: Production Process and Features
Learn about the production method of moisture-resistant gypsum and its applications in construction.
Introduction
In the construction industry, one of the fundamental challenges is resistance to moisture. Moisture can damage the structure of buildings and incur high costs. In this article, we will examine the production process of moisture-resistant gypsum and demonstrate how this type of gypsum can be beneficial in construction.
What is Moisture-Resistant Gypsum?
Moisture-resistant gypsum is a type of building gypsum that acquires moisture resistance by adding specific materials to regular gypsum. Due to its special properties, this type of gypsum can be used in humid and water-prone environments.
- Resistance to moisture
- Reduced risk of mold and mildew
- Higher durability and stability

Siva Handheld Polymer Gypsum
Siva gypsum features high final setting time (2 hours and above), abrasion resistance, scratch resistance, low waste of mortar, single-layer application, no need for resin coating before painting, suitable adhesion, adequate coverage, thermal, moisture, and sound insulation, and increased execution speed due to ease of use. Siva handheld gypsum is used for finishing concrete structures (tunnel formwork).
Stages of Producing Moisture-Resistant Gypsum
1. Selection of Raw Materials
To produce moisture-resistant gypsum, raw materials such as gypsum rock, chemical additives, and other minerals are selected. These materials must be of high quality to ultimately produce a durable product.
2. Processing and Grinding of Materials
The gypsum rock, after extraction, is sent to grinding machines to be converted into a fine powder. This process is crucial because the gypsum particles must be uniform and homogeneous for the moisture-resistant properties to be properly developed.
3. Adding Moisture-Resistant Materials
At this stage, specific additives are incorporated into the gypsum. These materials may include silicates, aluminates, and polymeric substances that help enhance moisture resistance.

Siva Machine Applied Polymer Gypsum
Siva machine-applied gypsum, in addition to high execution speed, provides thermal insulation, moisture insulation, and sound insulation, and has a lower specific weight compared to regular gypsum. Siva machine-applied gypsum can be applied in a single layer on various surfaces including brick, porous and cement blocks, concrete surfaces, lightweight concrete blocks, cement coatings, and even foam.
4. Calcination and Drying
The mixed gypsum is calcined in high-temperature kilns. This process removes the natural moisture present in the gypsum and increases its strength.
Applications of Moisture-Resistant Gypsum
Moisture-resistant gypsum is typically used in areas prone to moisture, such as:
This type of gypsum is used as a final coating for walls and ceilings.
Advantages of Using Moisture-Resistant Gypsum
Conclusion
Moisture-resistant gypsum serves as an effective solution in the construction industry to address moisture-related issues. Given the features and benefits of this type of gypsum, its use in construction projects is highly recommended. For more information, you can visit Gach Sahar Products.
