Remember: The information contained herein is, to the best of our knowledge and belief, accurate. However, since handling conditions and use are beyond our control, we make no guarantee of results, and assume no liability for damages incurred by use of this material. Concrete Pump Supply LLC responsibility for any claim arising out of breach of warranty, negligence, and strict liability or otherwise is limited to the purchase price of the materials.
Step 1.
Add a one pound bag into the mix for each yard of concrete to
be delayed for up to three hours. The following quantities are
based on a standard concrete hopper on the pump and 5 inch lines:

Booms 32 meters and below - one bag.
Booms larger than 32 meters - two bags.

For large lines (5 inches) use on bag for each 100 feet.
For small lines (less than 5 inches) use one bag for each 200 feet.

Step 2. 
• Agitate at high speed for five minutes.

Step 3. Mix
• If there is concrete in the pump system, please tip hose over hopper and re-circulate so that Slow Willie is completely mixed with all concrete in system and hopper.

Step 4. Adjustments:
If Slow Willie treated concrete will be used:
• Sooner than planned, add fresh concrete or concrete accelerators.
• Later than planned and has not returned to its original slump, simply add more Slow Willie.

Guidelines For Use

  • Promote a clean, effective work environment by following safe workplace regulations.
  • Follow appropriate Federal, State, and local regulatory agency guidelines if/when disposing of the prime.