Gypsum Retarder is a white powder with good fluidity, can be mixed and dispersed well with gypsum, either by spiral mixing or grinding. Using gypsum retarder, the working time of the gypsum can be prolonged for an hour or hours on demands. It helps to easy work, more efficiency, and lower cost.

Types of Gypsum Retarder:

(1) Alkaline phosphates: mainly Sodium Hexametaphosphate and Sodium Polyphosphate ;

(2) Protein Gypsum Retarder ;

(3) Organic acid and its soluble salt retarder: mainly Citric Acid and Tartaric Acid.

Kundu Chemical Protein Gypsum Retarder KDR-18 is a new type of protein based high efficiency gypsum retarder, researched by our own company independently. It has super retarding effect with smaller dosage. It can adjust the gypsum products' setting time freely by customers’ various needs. It helps gypsum and plaster products to have few strength loss rate after gypsum hardened.

Particularly suitable for the following application areas:

A: Additive in the production of gypsum board and gypsum blocks.

B: Additives for dry gypsum-based products such as caulking gypsum and plastering gypsum.

Gypsum Retarder KDR-18 performance indicators:

Only by adding Gypsum Retarder to transform gypsum-based products can truly have value during using. Therefore, gypsum retarder are of great significance for the application of gypsum-based building materials.