No. A true beveled mirror has no trim: its bevel is the sheet's own edge, cut at an angle and polished, so nothing is attached that could come off. Some decorative mirrors are built another way, with separate strips of beveled mirror bonded around a flat center mirror, and those strips can work loose when the bond behind them fails.
A solid bevel and a bonded strip look alike from across a room and feel different up close. A solid bevel is one piece of glass whose edge slopes down from the full thickness of the center to a thinner polished edge. A strip mirror is a flat mirror with separate beveled pieces laid over or around it. Beveled mirror strips are sold as a product of their own: one fabricator makes them from 1/4 inch mirror with a 1/2 inch bevel on the two long sides, and they can be cut to length and mitered. A mirror mastic maker files strip work under the heading of mirror overlays.
A fingertip settles it. Run one from the reflective center outward. On a solid bevel the surface never breaks: flat glass, a soft crease, the slope, the edge. On a strip mirror the finger meets a step where the strip begins, the corners show joints, and where the strips are laid over the center, the side of the mirror shows two layers of glass instead of one. How a true bevel is cut and polished is explained on the beveled mirror page.
A beveled strip is held by adhesive, and one mirror mastic maker treats tape and mastic as two different jobs. That maker pairs its mastic with double-faced tape for overlays, and its data sheet says the tape is "used only for initial adhesion" while the mastic provides the long-term bond. A strip pressed back on tape alone is not that method.
The adhesive also has to suit the mirror's backing. The Glass Association of North America's mirror bulletin says to choose an adhesive compatible with the backing and to avoid adhesives containing strong solvents or acids such as acetone, toluene, methylene chloride or acetic acid, which it says "can severely damage mirror backings." One mirror maker's compatibility table rates acetic acid silicones as not compatible with its mirrors, and the mastic maker tells users to check with the mirror manufacturer on tape. What a damaged backing looks like as it ages is the subject of the answer on black edges.
Whether a loose strip is worth re-bonding or the piece is better replaced depends on what sits under it: clean silver and an intact strip, or darkened backing and a chipped edge. A photo shows which. A replacement mirror is cut and edged in the Lodi shop to the size of the old one.
Adhesive is not the only thing a mirror should rely on. The Glass Association of North America's mirror bulletin prefers mechanical means, such as J-moldings, clips and screws, or framing, over tapes, adhesives and mastics, and one mastic maker recommends mechanical support for all mirror applications. The strips add weight to the piece, which makes the hanging method worth checking too.
Yes. The backing is what the adhesive touches, so it sets the choice. One mirror maker rates acrylic tape compatible with its plain mirror but not with its safety-backed version, and a mirror mastic maker says not to apply its mastics to vinyl backing and that mirrors with a changed paint backing need testing first. A safety-backed or vinyl-backed mirror narrows the options.
A photo of the loose strip and the backing behind it is the place to start. Text it to Jessica for a fast first look, or bring it to the Lodi showroom at 80 Industrial Rd, walk-in Monday to Friday 9 to 5 and Saturday 9 to 4. For a mirror still on its wall, book the free in-home measure.
