Gypsum Retarder Manufacturer | Extended Setting Time

NOVASTAR™ Amino-Based Gypsum Retarder

LANDU NOVASTAR Gypsum Retarder powder is an innovative chemical additive with amino groups. Gypsum retarder is introduced in building gypsum to control its setting time and make it more plastic and easier to process. It is widely used in construction for applications like gypsum board, gypsum-based self-leveling compounds, and gypsum plaster.

Living at the frontier of manufacturing specialty additives, LANDU can provide a high-quality gypsum retarder. If you are interested in knowing more information, contact us at any time.

Brand Name	LANDU NOVASTAR
Chemical Structure	Amino-Acid Group
Shipping	CIF, FOB, CFR, and More
Payments	T/T, LC, OA, and More
Gypsum Retarder Price	Negotiable
MOQ	500kg

Recommended NOVASTAR Gypsum Retarder

As a premier gypsum retarder manufacturer in China, NOVASTAR is excited to welcome you to our state-of-the-art factories and laboratories. Our global distribution network spans over 60 countries and regions, allowing you to get access to local resources to learn more about our additives.

	Grade	P100	P200	P300	P400
Dispersion Mechanism	Appearance	Light yellow powder
	Moisture Content	≤ 3%
	Bulk Density (g/L)	800–1,000	800–1,000	500–800	400–700
Environmental Impact	Caulking Gypsum	●●	●●	●●	●●
	Prefabricated Gypsum Components	●●	●●	●●	●●
	Gypsum Putty	●●	●●	●●	●●
	Gypsum Plaster	●●	●●	●●	●●
	Gypsum Based Self Leveling	●●	●●	●●	●●
	Other applications of Gypsum Product	●●	●●	●●	●●

Free NOVASTAR Construction Additive Samples

NOVASTAR is a trusted manufacturer of Gypsum Retarder, offering a wide range of additives tailored to meet your specific needs based on local conditions. If you feel confused about our portfolio, reach out for a NOVASTAR Free Sample and Services, and we will offer:

100% Free: No hidden charges – we cover the sample and shipping costs.
Fast Delivery: Your samples will be shipped promptly via FedEx or DHL for reliable and timely delivery.
Customizable Solutions: Not entirely satisfied? Our expert R&D team is ready to modify the sample to meet your exact specifications. We work closely with you to ensure the product aligns with your unique requirements.

3 Featured Applications of Gypsum Retarder

Gypsum Plaster

LANDU NOVASTAR Gypsum retarder can extend the setting time of gypsum plaster. It keeps spray plaster flowable. This prevents clogging in pumps, hoses, or spray nozzles, which can occur if the plaster hardens prematurely.
For plaster applied by hand, retarders are essential, giving workers more time to achieve a smooth, even surface. Additionally, LANDU NOVASTAR biodegradable retarders have no impact on the final strength of the plaster.

Gypsum-Based Self-Leveling Compound

LANDU NOVASTAR Gypsum retarder slows down the hydration of gypsum in self-leveling compounds. This delay allows the slurry to flow freely under gravity and achieve the required spreadability.
It also provides a longer opening time, allowing workers to mix, pour, and spread the self-leveling compound evenly before it begins to set.

Gypsum Board

LANDU NOVASTAR gypsum retarder, used at dosages typically ranging from 0.01& to 2.0% by weight of gypsum, controls and adjusts the setting time for extended workability. This control is vital for gypsum board production, where the gypsum slurry is poured onto a moving conveyor belt with paper. The retarder ensures that the slurry remains fluid long enough to bond with paper layers and be handled without cracking.

Check How LANDU NOVASTAR Gypsum Retarder Outshines Traditional Retarder

Product	Dosage	Initial Setting Time (min)	Final Setting Time (min)	2-Hour Flexural Strength	2-Hour Compressive Strength	2-Day Flexural Strength	2-Day Compressive Strength
P300	0.5	103	113	2.9	9.5	6.4	20.1
Citric Acid	1.5	95	99	1.9	8.4	5.2	18.5

As the bar graph shows:

The dosage of gypsum retarder is typically one-third of the number of citric acid.
Gypsum-based Self-leveling compounds with NOVASTAR amino-based retarder perform a longer setting time at both the initial and final periods.
The flexural and compressive strength of projects with an amino-based retarder is higher than that of citric acid.

Lower Dosage
Reasonable Speed Control
No Adverse Effects on Gypsum Crystal
Resistant to pH Value Fluctuation
Delay the Hydration Time without Sacrificing the Strength
Faster and Better Strength Development

Unpromising Quality Control

At LANDU NOVASTAR, we boast factories fully equipped with sophisticated facilities that adhere to ISO-certified processes, ensuring batch-to-batch consistency and unmatched reliability in every gram of product we deliver. From the start of the production, we choose the raw material-refined cotton from the world’s most recognized brands. During the manufacturing, we introduce a fully automatic production line without human interaction. In addition, our automatic packing machine works to further improve product consistency.

Driving Innovation in Specialty Chemicals

Equipped with over a decade of expertise and a brain trust in our R&D center, LANDU NOVASTAR specializes in delivering custom-made specialty additives along with vocational documents including reference formulas, test reports, and TDS(technical data sheets). We are the best solution-provider way more than just a manufacturer.

Customer-Centric Service Excellence

LANDU NOVASTAR prides ourselves on professional customization services to partners who have the necessary specifications for a product. With our team of chemical experts, we guarantee technical support and free sample modification based on the client’s finalized design. On top of that, the sales managers responsible for separate regions are always ready to make an immediate response to solve your problems. Partner with us for reliable service.

Combo Products

Frequently Asked Questions

How Does Gypsum Retarder Work?

– LANDU NOVASTAR Gypsum Retarder reduces the early hydration rate of gypsum to delay the setting time. This is achieved by inhibiting the dissolution of hemihydrate gypsum and the crystallization of gypsum dihydrate. In addition, the retarder does not backfire on the strength of your gypsum products.

How Should I Use Gypsum Retarder?

– You may add the gypsum retarder of the proper amount directly to the water and stir it to achieve a uniform consistency.
– The setting process can be affected by the temperature. You may contact LANDU NOVASTAR to request a dedicated formulation with proper dosage measured based on your local environment.
– Remember to clean mixing containers and tools after use, as gypsum mixtures can harden quickly and become difficult to remove.

Is Gypsum Retarder Compatible to Other Additives?

– Yes, gypsum retarders can be used with accelerators, water reducers, air entrainers, bonding agents, and fibers. However, you may need assurance before full-scale use. LANDU NOVASTAR could test the combination of retarders and other additives in a small batch and produce a final report to help you make decisions.

What is the difference between an Amino-based Gypsum Retarder and Traditional Retarder?

– Traditional retarders like sodium citrate and sodium polyphosphate can effectively delay the hydration of gypsum but may alter crystal morphology, potentially compromising the density and mechanical strength of the final product. In contrast, amino-based materials can prolong the setting time of hemihydrate gypsum while having a less pronounced impact on the mechanical strength values of the gypsum block.