How Gypsum Retarders Work

Anhydrite and hemihydrate gypsum hydrate rapidly when mixed with water to form dihydrate gypsum crystals, leading to fast hardening that shortens available construction time. Retarders adsorb onto gypsum crystal surfaces to slow crystal formation and extend the workable time of gypsum slurry. High-quality retarders barely impair the strength, whiteness, and fire resistance of finished gypsum products, while simultaneously improving the workability of the slurry. Common categories of gypsum retarders include protein-based retarders, citric acid, tartaric acid, and composite high-efficiency retarders.

Hydrolyzed protein polypeptides encapsulate gypsum particles with a colloidal film, inhibiting the nucleation and growth of dihydrate gypsum crystals. Citric acid binds calcium ions to form insoluble salts, which strongly blocks hydration and disrupts gypsum crystal structures.- Phosphates form calcium salt layers on gypsum particle surfaces to halt the hydration process.

A core advantage of vegetable protein retarders is that they only act through mild physical coating, without damaging the original crystal structure of gypsum.

GUUDPOLY^® Protein based Gypsum Retarder is Biodegradable materials. And it supply excellent prolonged setting time with none impact on gypsum strength.

GUUDPOLY^® Redispersible Polymer Powder improves adhesion strength, compressive strength, flexural strength, and waterproof performance.

GOODCEL^® Cellulose Ether effectively solves the water bleeding issue of fresh mortar and ensures stable mortar performance.

GUUDPOLY^® Superplasticizer greatly reduces water consumption, improves the flowability of fresh mortar, and enhances the bonding strength of mortar.

GUUDPOLY^® Water Repellent can effectively enhance the stain resistance and waterproof performance of gypsum surfaces, and reduce water absorption.

Gypsum Profiles

Prefabricated gypsum decorative profiles are one-step cast in molds with integrated three-dimensional carvings and curved surfaces. They are finished products ready for on-site assembly.

Gypsum Profiles include ceiling cornices, wall moldings, ceiling medallions, Roman columns, capitals, corbels, carved ornaments, window surrounds, arch frames and other special-shaped gypsum components.

Recommended Products for Gypsum Profiles

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