Concrete Crack Repair

The two most commonly used repair methods for cracked concrete are epoxy injection and polyurethane injection.  
 
Epoxy injection is accomplished by sealing the surface of the crack to contain the resin as it is forced into the crack under pressure.  Porting adapters are used along the crack to allow the resin to enter.  Following the cure of the injected resin, these adapters and the surface seal is commonly removed.  This is a structural repair.  Lily can supply either the CD15 Epoxy Dispenser for high-pressure applications or the LPI System for smaller, low-pressure jobs.  We also carry a complete line of everything the contractor would need to perform epoxy injection except the chemicals. 
 
Polyurethane injection differs in that holes are drilled at a 45-degree angle along either side of the crack intersecting it near the center.  Packers, a mechanical device, are then inserted into the holes to facilitate injection.  Polyurethanes often require water to initiate expansion.  If the crack is not actively leaking water, it can be injected into the crack and then followed with the resin.  This is a waterproofing application and is not a structural fix.  The CP-5 Grouter is used for the injection of polyurethanes.