Fritz-pak Corporation

Gypsum Retarder

Category: Set Retarders


High strength set retarder


  • 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.


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 cements. It can be used in blends of gypsum with these types of cements to prevent the early stiffening caused by gypsum. Recommended for industrial use only.


  • Item #99419: 44-lb (20-kg) bag. Packed in triple layered paper bags with inner polyethylene liner. 40 bags per pallet.
  • Custom packaging available on request.
Fritz-Pak Corporation NRMCA ACI ASCC ACPA Concrete Pumping