Structural Crack Repair
Structural cracks in concrete are repaired by pressure injection of our Prime Rez series of epoxy injection resins. There are many ways to accomplish this, but the basics are the same.
First, create a pathway for the epoxy to get into the crack. You can glue an injection port directly to the face of the crack. You can also drill injection holes straight into the crack or at an angle to intersect the crack.
Second, seal the surface of the crack with a Prime Gel series product to contain the epoxy resin during the pressure injection. If you can get to both sides of the structure, then seal both sides. If not, seal up what you have access to.
Third, inject one of our Prime Rez epoxy injection resins. Prime Rez 1100 High Mod LV is our most widely used product. It has an excellent balance between structural strength and a low viscosity to penetrate tight cracks. For cracks that are extremely tight (less than 1/32") or subject to shock and vibration, use our Prime Rez 1200 Low Mod LV. If you have to have the absolute highest strength, use our Prime Rez 1000 High Mod. To fill wide cracks, voids and honeycombs in concrete, use Prime Rez 1400 Void Filler. Finally, for wide cracks over 1/4”, use our Prime Rez 1600 Injection Gel.
Gravity Feed: Sometimes our Prime Rez series resins can be gravity fed into cracks in horizontal surfaces. The cracks can be routed out to provide a reservoir for the epoxy resin. Use Prime Rez 1100 High Mod LV for most cracks. Use Prime Rez 1200 Low Mod LV for hairline cracks.