Polyurethane Injection: 

 

• Flexible and allows for natural movement of the concrete due to thermal shrinkage and expansion.
  
• Can be used to repair wet or even leaking cracks, it repels water.
• Polyurethane crack injection could expand up to 20 times its volume.
  
  
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Epoxy Injection:

• Epoxy crack injection provides structural strength.
  
• Strength and bond with concrete greatly exceed the strength of the concrete itself.
  
• Only to dry surfaces, making the repair of a leaking or wet cracks impossible.
  
• No expansion - a 1/4-inch crack needs four times more epoxy than a 1/16-inch crack.
  
• Epoxy Crack Filler provides the strongest repair, which will withstand traffic.