Gypsum Retarder (Powder)

Guudpoly Powder form gypsum retarder is a water-borne, vegetable protein-based, high-efficiency additive designed to precisely delay the setting time of gypsum products with minimizing effect to the final strength. serving as a sustainable alternative to animal protein and synthetic retarders.

Related Product & Application

 
 

Vegetable Protein vs  Animal Protein

Sustainability & ethics: – Plant sources are renewable, cruelty-free, and have lower carbon footprint; animal protein relies on slaughterhouse by-products.

Consistency & odor:  Vegetable protein has uniform peptide chains, no putrid odor, and better batch-to-batch stability; animal protein may vary in quality and smell.

Safety & hygiene: – Lower risk of pathogens or contaminants; ideal for food-contact or indoor-sensitive applications.

Stable supply: – Plant raw materials are more abundant globally.

 

🌱 Core Advantages

Eco-friendly & Sustainable: made from renewable plant sources, it is cruelty-free, biodegradable, and has a much lower carbon footprint than animal-protein or synthetic retarders. No unpleasant odor and non-toxic, ideal for green building and indoor use.

Linear & Predictable Setting Control: Low dosage (0.05%–0.2% by weight of gypsum) delivers linear, proportional extension of setting time. It allows precise tuning of open time from 30 minutes to several hours with consistent, batch-stable performance.

Minimal Strength Loss: Forms a protective colloidal film on gypsum crystals without altering crystal morphology. It slows hydration while preserving long-term strength—far better than citric acid or phosphate retarders that weaken gypsum noticeably.

Excellent Compatibility & Stability: Fine, free-flowing powder disperses easily in dry gypsum mixes or mixing water. Stable across temperatures (works well even above 40°C) and compatible with all gypsum types (α/β-hemihydrate, flue-gas desulfurization gypsum).

Cost-effective & Reliable Supply: Plant raw materials are abundant, globally available than animal-protein by-products.

 

🧱 Key Applications

Gypsum Plaster & Stucco: – Extends working time for hand/machinery spraying;  improves surface finish.

Gypsum Self-leveling Flooring: – Maintains flowability, Maintains flowability for large flooring areas; prevents premature setting.

Gypsum Joint Compounds & Gypsum Adhesive: – Enhances workability and bond strength for interior finishing.

Gypsum Molds & Art Casting: – Enables intricate detailing with extended open time and minimal shrinkage.

Gypsum Board & Gypsum Blocks: – Optimizes production line speed, prevents premature setting, reduces breakage and ensures consistent quality.

 

Available Grade

Grade

Chemical Base

Type

Function

Note

Application

Technical Data Sheet

Guudpoly GR41

Natural polymer

Powder

Retarder

popular grade

Gypsum plaster, Gypsum joint filler, Gypsum Art, Gypsum board

Download TDS  

Guudpoly GR42

Natural polymer

Liquid

Retarder

popular grade

Gypsum plaster, Gypsum joint filler, Gypsum Art, Gypsum board

Download TDS  

Guudpoly GR81

Natural polymer

Liquid

Retarder

very high concentration

Gypsum plaster, Gypsum joint filler, Gypsum Art, Gypsum board

Download TDS  

Guudpoly GR91

Natural polymer

Liquid

Retarder

very high concentration

Gypsum plaster, Gypsum joint filler, Gypsum Art, Gypsum board

Download TDS  

 

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