Mortar Set Retarder

  • Overview
  • Packaging
  • FAQs
  • Advantages
  • Resources

When it comes to hot weather, no cement-based material is safe from rapid set times. That’s why Fritz-Pak developed our Mortar Set Retarder. This product is formulated to help masons, general contractors, and anyone working with prebagged concrete mixes during the hottest days of the year. The unique formula slows down the hydration rate of the cement to give you the working time you need to finish the job well, even when the sun is beating down.

Why Use Mortar Set Retarder

When mortar mixes are exposed to extreme temperatures, the hydration process naturally speeds up. This is why cement-based building materials tend to set up faster in hot weather. Adding a retarder, such as Mortar Set Retarder, to mix slows down the hydration process to slow down the overall set time. This gives you, as the mason or concrete contractor, enough time to finish the job before the mix sets up entirely.

Additional Benefits of Mortar Set Retarder

Fritz-Pak’s Mortar Set Retarder won’t impact the overall strength of the concrete. It is easily added to the mix at the job site. One bag will delay the setting time by about one hour. You can add additional bags for up three hours of delayed set. Finally, this delay set will not change the color of decorative concrete mixes.


If you have any questions about our mortar retarder, give us a call at (214) 221-9494. Don’t forget to follow our social media pages for more information about how products can improve your concrete.

984535.6 oz. (158 gram)246
Will Mortar Set Retarder harm the concrete?
Can I redose?
Yes. You can add more Mortar Set Retarder if the initial concrete set has not started. You may redose up to three times.
What happens if you overdose the concrete?
Set time will be longer, but set will still occur.
Will it change the color of concrete or mortar?
  • Designed for masons and contractors who use bagged concrete or mortar
  • Slows down set time of pre-packaged mortar or concrete
  • Easy to use. One bag extends set time about one hour
  • Dosage can be increased for longer retardation, as long as 3 hours
  • Improves mortar or concrete workability
  • Does not affect strength
  • Excellent for use in hot summer months
  • Will not affect colors in concrete
  • Allows for prolonged decorative work
  • Can be easily stored for use as needed
  • Suitable for all types of concrete

Applicable Standards

This product meets the following specifications:

  • ASTM C-494 Type B