
KEEMIYA MATERIALS
Gypsum Retarder
Gypsum Retarder
Manufacturer: CemotechBrand: Gypstar
More working time. More precise application.
Gypsum retarders adjust the setting time of gypsum-based systems. Type and dosage must suit gypsum reactivity, working temperature and required application time. One fixed dosage will not produce the same result with every gypsum source.

Adjust setting time
Extend workability
Support continuous application

APPLICATIONS
Where is it used?
- Hand- and machine-applied plaster
- Gypsum putties and joint fillers
- Gypsum components and blocks
Match the intended use to the grade, process conditions and technical documentation.
GRADE SELECTION
Choose a grade for your process.
Use these criteria to start a technical discussion. Numerical specifications and dosage must come from the grade documentation and application trials.
Request TDS, SDS & analysis →- Gypsum type
- Record the source, purity and reactivity of the gypsum.
- Working time
- Test initial and final setting at the actual application temperature.
- Final properties
- Assess strength and surface quality after adjusting setting time.
Cemotech
Name: Cemotech is listed on the basis of Keemiya’s product information and related sources. Brand, grade and shipment origin are confirmed during enquiry.
Before you select
Does a higher dosage always improve the result?
No. Establish dosage through testing. Excessive retardation can affect the application schedule and final properties.
What information is needed for a grade recommendation?
Share the application, formulation type, process conditions, target performance and required quantity so we can review the grade and documentation.
Product and manufacturer sources
Sources reviewed: 25 October 2026. This overview does not replace the grade’s technical specifications.

