I have an old LED strip mounted on the underside of our retaining wall that needs to be replaced. The current LED strip is seated in a routed channel on the underside of the top stone, but to prevent it from falling out, it's also secured with something that looks like small dried blobs of cement on the back of the strip.
I probably need to attach the new strip in a similar way. What could have been used? Cement, stone adhesive, or something else?
