Gypsum Retarder

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Fritz-Pak Gypsum Retarder is a dry powdered admixture used for extending the set time of gypsum or gypsum-containing blended materials. It is an organic synthetic poly-oxy-methylene amino acid of high purity. It does not contain any carriers or extenders.

Gypsum Retarder does not contain any materials that interfere with Portland cement or Calcium Aluminate cement. It can be used in blends of gypsum with these types of cement to prevent the early stiffening caused by gypsum. Recommended for industrial use only.

Item#DescriptionBags/Pallet
9941944 lb. (20-kg) bag40
Does Gypsum Retarder have a strong or offensive odor?
No. Gypsum Retarder is a synthetic amino acid that does not have any odor.
Is Gypsum Retarder available in water soluble bags?
No. Gypsum Retarder is for industrial use, and it is only available in 44 lb. bags.
Will Gypsum Retarder retard portland cement or calcium aluminate cement?
No. Gypsum Retarder is specific for gypsum.
Can Gypsum Retarder be used in blends of cement and gypsum?
Yes. However you may have to increase the dosage of Gypsum Retarder.
The dosage rate of Gypsum Retarder is too low for effective plant addition. Can Fritz-Pak blend it with inert materials?
Yes. Diluted blends for easier plant addition can be made.
  • Slows the set time of gypsum and gypsum-containing materials
  • It is a high-strength retarder that is effective at low dosages
  • Purified material with no offensive odors
  • Dose-response is linear, making the determination of effective dosage easy
  • Can be used in cement-gypsum blends
  • Effective over wide range of pH
  • Efficacy does not diminish during storage