They're “not quite miraculous,” but this family of materials “has almost breath-taking possibilities in the concrete construction field,” enthused a January 1958 article. This “relatively new liquid resin—called Epoxy” promised finally to provide a means for bonding new concrete to old. The photo, from March 1957, illustrates a test in which a broken beam was repaired with an epoxy alloy and subjected to a load test. The beam fractured at a new point, “proving the weld was stronger than the beam.”