• It's critical that a fence post's cement be cured fully before adding the support and rails.picket fence detail image by Aaron Kohr from Fotolia.com
  
  

Traditional Cement

• Standard concrete mixes are available. While cheaper, the drying times are significantly longer; a week versus overnight, for example.
  
  

Quick Cure Concrete

• Quick curing concrete mixes come pre-packaged and you only add water. "Quikrete," for example, comes in a 50-pound bag and takes only 24 hours to cure.
  
  

Bottom Line

• The general consensus is that you use the concrete that best suits your project. In the case of building a fence, you'll likely want to continue adding the support and rails as soon as the posts are set. In that case, the quick curing concrete will allow you to complete your project sooner.