How-to-glue-sheet-metal-to-concrete, credentials: i am academically trained as a civil engineer, was a full time development consultant ( when not on active duty as an army officer) and civil designer for more than 15 years and from 2004–2009 was president / managing principal of civ.... Apply a thick layer of liquid nails metal projects repair adhesive (ln-203) to the surface of the aluminum and concrete. firmly press the aluminum into place on the concrete. follow the liquid nails label instructions for details on application. clamp the bond together with c-clamps or a vice for up to 24 hours. jeffery keilholtz.