Gypsum Retarder

Powder Form

JTBON® Gypsum Retardant is a high-efficiency, amino acid-based powder additive for gypsum-based systems. It extends setting time without reducing strength and is ideal for gypsum plaster, gypsum self-leveling, gypsum putty and gypsum modeling and gypsum based decorative coating, etc. Compatible with superplasticizers, foaming agents, defoamers, and other JTBON® additives.

Grade Name	Appearance	Water content	pH Value	Dosage	Recommended Applications	Technical Data Sheet
RG 30	White or light yellow powder	≤10.0 % w/w	8±2	0.01-0.2%	Gypsum plaster, Gypsum self-leveling Gypsum putty Gypsum modeling Gypsum based decorative coating, etc	Download TDS

Key Advantages

Extended Setting Time

Highly effective setting delay for the hydration process of gypsum achieved even at minimal doses
Excellent linear retarding

The retarding time of gypsum increases linearly with the increase of dosag
Excellent alkaline resistance

Under alkaline(Cement, Lime calcium) conditions still provide excellent performance
Effectively avoiding plaster cracking

Shorten the initial and final setting interval to avoid tong interval for cracking caused by tong interval
No reduction of final strength

Unlike with several fruit acid based retarders, it won’t reduce in the final strength of gypsum based products

Q&A

Q1: What is Gypsum Retarder Powder based on amino acids?

A: It is a gypsum retarder developed from amino acids containing –NH₂ and –COOH groups, which provide unique chemical properties and stability. This formulation retards gypsum setting while maintaining the final strength of the product consistently.
Q2: How does it differ from fruit acid-based retarders?

A: Unlike fruit acid-based retarders that can reduce gypsum’s final strength, this amino acid-based formulation preserves the material’s integrity. Its stable chemistry ensures a consistent delay in setting without compromising the finished product’s strength during curing.
Q3: Can it be used with other additives?

A: Yes, this retarder is compatible with additives such as plasticizers and accelerators. However, it is essential to perform compatibility tests and small-scale trials before full-scale application to confirm optimal performance and prevent any potential adverse interactions.
Q4: What is the recommended dosage for use?

A: The recommended dosage of this gypsum retarder ranges from 0.01% to 0.2% by weight. It is crucial to conduct preliminary tests to determine the most effective concentration for your specific application and environmental conditions.
Q5: What testing is required before use?

A: Prior to use, conduct thorough testing including compatibility trials with other additives, performance assessments, and dosage calibration tests. These evaluations ensure that the retarder functions correctly and meets the specific requirements of your gypsum-based application.
Q6: Who should be contacted for technical support?

A: For any technical inquiries or issues regarding product mixing, compatibility, or dosage calibration, please contact our Technical Services Department. Their expert advice will guide you in achieving optimal performance and addressing any challenges that arise.

Gypsum Retarder

Powder Form

Key Advantages

Extended Setting Time

Excellent linear retarding

Excellent alkaline resistance

Effectively avoiding plaster cracking

No reduction of final strength

Q&A