Lily Corp

An engineer at a local water department recently asked us if we could epoxy-inject leaking cold joints in one of their water tanks. We've never injected cold joints, and we couldn't determine the exact places along the cold joint that were leaking. Can leaking cold joints be injected? Where do we set the ports? More

About two months ago, we injected a crack in a residential foundation. The crack was about 1/8 inch wide at the surface. We weren't sure if we could control resin drainage, so we used an epoxy gel rather than a lower modulus material. Since the wall was 8 inches thick, we installed the entry ports 8 inches apart, capped the crack, and injected the resin. We started injecting at the bottom of the crack and worked our way up, plugging the port when epoxy flowed out the next port. Everything proceeded normally. The owner called recently saying that another crack had developed next to the old crack. Conventional wisdom is that the crack we injected was a moving crack and shouldn't have been injected. But I'm sure the crack was not moving. Is there any other explanation? More