How to Remove Backing From Mirror

How to Remove Backing From Mirror

Have you ever noticed the black, sticky, gooey material on the back of mirrors? This is called mirror backing and is necessary to ensure the mirror’s durability and longevity. It is designed to protect the reflective coating on the back of the mirror from scratches and damage while preventing moisture from seeping in and causing damage. While it may not be the most aesthetically pleasing, mirror backing plays an important role in keeping your mirror in good condition for years to come.

In this guide, I’ll walk you through everything you need to know how to remove backing from mirror successfully. So grab your pry bar and put on those work gloves – it’s time to erase that unsightly backing from your reflection!

Why Remove The Mirror Backing in the First Place?

Before we dig into the nitty gritty details, let’s discuss why you might want to remove the backing from a mirror in the first place. Here are some of the most common reasons:

  • The backing is bubbling, cracked, stained or otherwise damaged. This can make your mirror look old and dingy. Removing the backing gives you a chance to replace it or leave the mirror backingless for a new minimalist look.
  • You’re repurposing an old framed mirror. Sometimes the frames are in good shape, but the backing is damaged. Taking off the backing lets you insert a new mirror into the frame.
  • You want to use the mirror for a craft project. Removing the backing lets you cut and shape mirror pieces for mosaics, jewelry, wall art and more crafty endeavors.
  • There’s a gap between the mirror and backing. This allows moisture and grime to build up, leaving you with an ugly outline of the backing on the mirror’s reflective surface. Taking off the backing provides the chance to clean it up.
  • You simply prefer the look of a frameless, backingless mirror. Many find this sleek, modern aesthetic more appealing than a traditional framed mirror.

As you can see, there are plenty of great reasons to remove that unsightly mirror backing. The end result is a pristine reflective surface and more options for repurposing your mirror.

Why Remove The Mirror Backing in the First Place?

Different Types of Mirror Backing

Before you can remove a mirror’s backing, it helps to understand what type you’re dealing with. There are a few common options:

Foam Board Backing

This lightweight backing consists of foam board glued directly to the back of the mirror. It’s an inexpensive backing option used mainly for smaller, decorative mirrors. The foam board backing peels off relatively easily compared to other types.

Chipboard Backing

Like foam board backing, chipboard backing is lightweight and budget-friendly. As the name suggests, it’s made from compressed and glued wood chips. Removing this backing can be a bit trickier as the glue adhesion tends to be stronger.

Hardboard Backing

Hardboard consists of compressed wood fibers molded into rigid sheets. It’s a sturdy, durable backing option commonly used with larger mirrors. Removing hardboard backing takes some muscle and prying power as the adhesion is quite strong.

Mastic Backing

This tar-like black substance firmly glues the mirror to its backing material. It can be found with various backing types and is thick, sticky and stubborn to remove. Mastic backing will likely take the most time and effort to eliminate.

Now that you know what to look for, inspect the edges of your mirror closely. Look for clues like the color and thickness of the backing material. Knowing the type of backing before starting removal allows you to gauge the difficulty level and prep accordingly.

Gather Your Materials: Key Tools and Supplies

Removing mirror backing is not a quick or easy project. Having the right tools is absolutely essential for success. Here’s a list of handy supplies to gather before you get started:

Flat pry bar: The most vital tool to help separate the backing from the mirror surface. An 8-10 inch bar provides optimal leverage.

Scraper: Useful for scraping off any remaining sticky residue after prying off the backing.

Utility knife: Helps cut through sealant or backing around the edges. Use with caution near the glass.

Gloves: Protect your hands from sharp mirror edges and irritating chemicals.

Safety glasses: Guard your peepers from flying debris during the backing removal process.

Painters tape: Mask off the reflective surface to avoid scratches, cracks and chips.

Drop cloths: Provides a protective barrier between your work area and nearby surfaces.

Adhesive remover: Helps dissolve any leftover sticky mastic or glue residue.

Mineral spirits: Alternatively, mineral spirits can help remove residual glue from the mirror surface.

Razor blades: Useful for scraping off excess adhesive in hard to reach nooks once the backing is removed.

Microfiber cloths: For wiping down the mirror’s reflective surface after removing the gunky glue.

Remove Mirror Backing Step-By-Step

Now we get to the good stuff – the full, detailed walkthrough for removing your mirror’s backing! Follow these steps closely for backing removal success:

  1. Carefully examine the mirror for cracks before starting. Note any pre-existing flaws so you don’t confuse them later for damage from the backing removal process.
  2. Use painters tape to mask off the reflective glass surface around the outer edges. This protects the mirror from wayward scratches or dings during prying.
  3. Secure the mirror face down on a flat, soft surface like a rug or towels. You want ample padding underneath to prevent cracking from pressure.
  4. Insert the flat pry bar about 1 inch in from the edge, between the mirror and backing. Use the utility knife to slice through any outer sealant first.
  5. Slowly twist the pry bar to separate the backing from the mirror. Take your time and adjust the angle as needed. Too much force in one spot can cause cracks.
  6. Once you create some separation, move the pry bar farther inward while firmly holding the freed backing piece up. This prevents it from re-adhering to the mirror.
  7. Work your way around the entire perimeter, prying up a small section of backing at a time. Apply penetrating oils like WD-40 if you meet very stubborn mastic or glue.
  8. As you pry off bigger sections of backing, the mirror may start to pivot. Have a helper hold it steady and readjust as needed.
  9. Switch to a paint scraper or razor blade for removing any remaining sticky residue after the main backing is off. Take care not to scratch the mirror surface.
  10. Use adhesive remover or mineral spirits to dissolve any excess glue or mastic residue. Check for any leftover gunk in the edges and corners.
  11. Wipe the mirror cleanly using microfiber cloths dampened with water or glass cleaner. Work in small sections to remove all traces of grime.
  12. If fully removing the frame too, use a utility knife to cut through any sealant or hardware. Retain any decorative pieces for future use.
  13. Admire your handiwork! The mirror should now have a pristine reflective surface ready for use or a new backing.

Follow those steps closely and you’ll free your mirror from that unsightly backing. Just be extremely careful during prying not to apply too much localized pressure, which can result in cracks or breakage.

Tips for Avoiding Cracks and Breakage

Tips for Avoiding Cracks and Breakage

Speaking of cracks and breakage, here are some handy tips for keeping your mirror intact throughout the backing removal process:

  • Use very sharp razor blades. Dull blades require more force and are more likely to dig into and crack the glass surface.
  • Keep the pry bar blade as flat as possible against the mirror backing. This distributes force evenly. Twisting or angling it risks concentrated stress.
  • Take frequent breaks to reposition tools and stretch your muscles. This prevents rushed mistakes and fatigue.
  • Apply penetrating oils liberally to dissolve pesky mastic or adhesives rather than brute prying force.
  • If using power tools for backing removal (not recommended!), use the lowest speeds and lightest pressure settings.
  • Maintain a firm, steady grip on freed backing pieces. If they slip and re-adhere, the mirror may crack when prying again.
  • Keep the work surface padding thick and consistent under the mirror. Uneven pressure points can lead to cracks.
  • If cracking sounds or chips occur, stop immediately and reevaluate your approach. Don’t force through cracks!
  • Wear gloves and use tools judiciously near the mirror edges and corners. These areas chip and crack easily.

Preparing and Cleaning Your Backingless Mirror

Once that pesky backing is finally gone, don’t stop now! You’ll need to properly clean and prepare the newly exposed mirror surface:

  1. Remove any remaining debris like shards of backing material or trapped filth behind the backing.
  2. Generously apply adhesive remover or mineral spirits to any areas of residual glue or mastic. Let it sit for 5-10 minutes before wiping clean.
  3. Scrub all areas of the mirror thoroughly using microfiber cloths and a glass cleaner formulated for mirrors. Don’t forget the edges and corners!
  4. For a really deep clean, use a mild mix of vinegar and water. This helps eliminate greasy residue and hard water stains.
  5. Rinse with plain water then wipe fully dry with a lint-free cloth. Air drying avoids streaks.
  6. Finish by using an ammonia-free mirror specific polish to add an extra layer of sparkling protection.

Take the time to really clean and care for that newly revealed reflective surface. After all the hard work removing the backing, you want your mirror looking its absolute best!

Creative Ways to Use Your Backingless Mirror

The grubby backing is gone and the mirror is gleaming – now what? Here are some creative ways to use your backingless mirror:

  • Leave it frameless for a modern, minimalist look. Just add hidden brackets to mount on the wall.
  • Use mirror clips to attach it to furniture like dressers, side tables, or headboards.
  • Lean it against a wall propped on a decorative stand or corbel brackets.
  • Cut pieces to make elegant mosaic mirror wall art. Use colorful grout in the spaces between.
  • Glue shards to make mirrors for an accent table or jewelry box. Get crafty!
  • Use strong magnets to hold it in place for a unique focal point.
  • Attach thin wood slats to the edges to make a mirror into wall art.
  • Prop multiple backingless mirrors together at angles for an infinity mirror effect.
  • Attach small backingless mirrors to larger mirrors as an accent focal point.

Let your creativity run wild! Backingless mirrors offer abundant design possibilities. The only limit is your imagination.


How do I remove the frame too when taking off mirror backing?

Use a utility knife to cut through any sealant or hardware attaching the frame to the wall or mirror. Retain any decorative frame pieces you want to reuse later. Remove nails attaching to the frame’s sides. Then, pry to the frame away from the newly backingless mirror.

What’s the easiest type of mirror backing to remove?

Foam board backing generally comes off the most easily. The foam provides less adhesion than wood or mastic backing options. Just take care not to gouge the soft foam when prying.

How can I tell if my mirror has mastic backing?

Check for a thick black tar-like substance around the mirror’s edges or back. Try scraping a little with your fingernail – if it’s gooey and firmly stuck on, it’s likely mastic. Removing this backing type requires the most work.

Can I remove mirror backing without damaging the reflective side?

Yes! With proper preparation and care, you can remove the backing without harming the mirror side. Just follow the steps closely, especially padding underneath and taping off the mirror surface edges. Take it slowly.

What’s the best way to clean the mirror after removing old backing?

Use a mix of microfiber cloths and glass cleaner formulated specifically for mirrors, vinegar, and water. Take time to thoroughly clean all areas, including the edges and corners, to remove any residue.

I cracked my mirror during backing removal – now what?

Unfortunately, not much can be done for cracked mirrors except replacement. In the future, follow the tips closely to prevent damage. Slow, even prying pressure is key. Consider hiring a professional if you have valuable antique mirrors.


A backdrop-free mirror is a type of mirror that is designed to provide a clear and unobstructed view of the person standing in front of it. Decorate with mirrors to elevate your space, as they are particularly useful for applying makeup, styling hair, or examining one’s appearance in detail, enhancing both aesthetics and functionality. By eliminating any distracting background elements, a backdrop-free mirror can help ensure that the focus remains solely on the person’s reflection, allowing for a more precise and accurate assessment of their appearance.

Matthew Olson

Matt McGrath is a travel blogger and writer in the blogging community who has been to more than 50 countries. He loves exploring new cultures, but also likes sharing practical tips with his followers about how they can easily afford this exploration!

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.