Epoxy glue is strong enough to hold a wood or PVC frame for a bathroom mirror. To ensure the PVC glue has been properly mixed and applied, follow the directions for using the glue as instructed on the package. Typically, a wood frame only requires a thin coat of epoxy to get the job done.
A few precautions should be taken when using epoxy glue to frame a mirror in the bathroom. Test the epoxy glue on a small piece of glass to see how it will work with the framing materials. Fast-setting epoxy is best for this home repair project and bonds with glass and wood quickly. Avoid using too much epoxy, as it can drip on the mirror and other surrounding areas and create a sticky mess.
An alternative to glue for framing a bathroom mirror is mirror adhesive tape. Adhesive tape is easy to use and less messy than glue. The application is fairly easy, only requiring the proper length and width measurements of the frame. Once these measurements are obtained, cut the tape to size and place it on the back of the framing panels, then attach the glass.
The two most common frames for bathroom mirrors are wood and PVC (poly vinyl chloride). PVC frames are lighter and will not warp when exposed to the humidity of the bathroom. Wood framing is heavier and likely to warp over time because of the bathroom's humidity. Wood is more natural and can be stained any desired color. PVC also can be painted any desired color using semi-gloss paint. Both will work with either epoxy glue or mirror adhesive tape; it's just a matter of personal taste.