Measure each side of your wall mirror.
Cut four lengths of PVC baseboards that match the measurements you found in step one using a circular saw.
Bevel the end of each piece of baseboard to a 45-degree angle, allowing the four pieces you cut to fit together like a picture frame.
Mix your clear epoxy glue in a disposable container using a paint stirrer. Epoxy glue comes in two parts and must be mixed before it can be used.
Paint the back of one of the lengths of PVC baseboard with epoxy glue using a paintbrush.
Press it against the corresponding edge of the mirror.
Repeat Steps 5 and 6 for each edge of your mirror.
Allow the glue to cure completely. The time that is required is stated on the glue’s packaging.