Glass Two Way Mirror

The glass is flatter than the acrylic and has a slight bronze tint. The glass is only reflective from one side, the observer is able to see straight through it, but from the other side, all the people are able to see is a regular mirror. We can temper the glass to increase its strength by 10x. The glass is rated for outdoor use and has a highly durable coating which can be cleaned by standard glass cleaners such as Windex with ammonia.


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  • Standard Sizes
  • FAQ
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  • Small Sample $3.95 Add To Cart
    8" x 10"   $25.00 Add To Cart
    12" x 12" $45.00 Add To Cart
    11" x 14" $48.13 Add To Cart
    16" x 20" $100.00 Add To Cart
    24" x 24" $180.00 Add To Cart
  • How does a two way mirror work?
    A two way mirror, a mirror that is transparent on one side and reflective on the other, is created by placing a layer of semi-transparent film of aluminum on an acrylic substrate. This allows a percentage of light to pass though and reflects the rest.

    We've all seen a cop drama TV show or film in which a criminal suspect is interrogated while police watch from behind a mirror. Why can't the suspect see those watching him behind the mirror? The answer lies in the level of lighting in both rooms. The room the suspect is in is kept very brightly lit, so that the light in the room reflects off the mirror's surface. The observation room containing the police, on the other hand, is kept dark, so that little to no light gets through the glass. As a result, the suspect sees only his own reflection and the police see into the suspect's room clearly. If the lights in the suspect's room were suddenly turned out, or the lights in the observation room suddenly turned on, then the two way mirror would become a window. It's the same sort of effect you see in a mirrored office building at night -- if there is a light on in one of the offices, you can see into that office just fine.

    Which is better, acrylic or glass?
    For most projects, glass is better. The glass has the advantage that it is only reflective in one direction, whereas the acrylic is reflective both ways. This means that the acrylic only works if one side is close to pitch black, but the glass will work in most situations where the observation side is somewhat darker than the side being observed.

    What is the difference between a two way mirror and a TV mirror?
    They are similar. A TV mirror is designed to allow more light through, making it more transparent and less opaque than your typical two way mirror.

    What is the difference between a one way mirror and a two way mirror?
    These two terms actually mean the same thing. A "one way" mirror describes the light going in only one direction--back at you. You can only see through it "one way," from the backside. A "two way" mirror describes a mirror that you can see through, depending on the right circumstances. In other words, when light hits the surface of a two way mirror it reflects back at you while simultaneously reaching the observer on the other side. In the glass industry, "two way" is used more often because technically a "one way" mirror is also describing a standard opaque mirror with no transparency.

    Can you cut shapes, holes, or polish the edges?
    We offer full fabrication services, please contact us with the size and quantity for a quote.

    What is the advantage of tempering glass?
    Tempered glass is heat-treated to resist shattering. On extreme impact, it shatters completely into thousands of small, blunt pieces. Like laminated and wired glass, it is used in schools, public buildings and patio doors to prevent injury if accidentally broken. It is more expensive than normal glass and cannot be cut once tempered. Although generally more break-resistant than plate glass, tempered glass has disadvantages where security is a consideration. Because it shatters into many small, blunt fragments, it does not make the distinctive sound of breaking glass; therefore, it doesn't attract attention, and poses little physical danger to burglars.

    How fast can I get the mirror?
    We can ship orders immediately via FedEx, except tempered glass, which takes 3 days until ready for shipping. Your shipping options will appear after you add items to your shopping cart and check out. Large glass above 24"x36" in size needs to be packed in a specially designed padded crate and shipped via freight. International deliveries are shipped via USPS International Express and usually arrive in about one week.

    What glue should I use with glass?
    For glass we recommend UV glue or CRL black mirror mastic. We recommend you practice first on a sample piece to make sure you are satisfied with the effect before trying it on larger mirrors.

    How strong are your mirrors?
    Our 1/4" thick acrylic mirrors can easily withstand a high-speed impact from a blunt object such as a hammer. The glass is brittle unless you get it tempered, which increases the strength by 10x.

    What's the largest size of glass you can cut?
    96" x 130"

    How likely is it the mirror will break in shipping?
    It's very unlikely that our mirrors will break in transit. Our mirrors are fully insured and packaged in custom boxes and wrapped in strong, flexible packing materials to ensure that they're well-protected during transit.

    Do you offer combined shipping discounts?
    Discounts are automatically calculated by our shopping cart. If you are ordering more than 5 of a size, please contact us for a price quote.

    What is the best tool to use to cut the glass mirrors?
    With non-tempered mirrors, the score-and-break method is used with a glass cutting wheel, just like regular glass. Tempered glass can't be cut.

    Can the mirrors be used outside?
    The glass mirrors work great outside and as windows. The acrylic mirrors don't work outside because moisture damages the coating.

    What should I use to clean the surface of the mirror?
    The coating of the glass is extremely durable and can be cleaned with any standard glass cleaner such as Windex and paper towels.

    How can I evaluate a mirror sample?
    The easiest way to test the lighting with just a small piece is to cut a hole in a large piece of cardboard and place the sample over the hole. This will allow you to judge the reflective properties in a larger area.

    How can I buy a framed mirror of a different size?
    Currently, we only sell frames in standard sizes, but you can easily get a custom frame made at a local frame store. Make sure that you buy the mirror first before the frame, so that the frame can be made to fit perfectly.

    How can I make my own two way mirror?
    We don't provide directions telling people how to make their own two way mirrors because it involves handling extremely hazardous chemicals and we don't want anyone to get hurt attempting to do so. It's easier, less dangerous, and less expensive to buy one from us pre-made. If you attempt to make them on your own, be sure to invest in a hazmat suit to prevent heavy metal poisoning.

    How can I set up a camera to record behind the mirror?
    A camcorder with a long recording time or webcam attached to your computer with recording software installed are the best tools to record for extended periods.

    Does it matter which side is facing outwards?
    In most situations, the mirror side should be closer to those being observed. If you are using a camcorder, it should be closer to the uncoated side.

    How do I figure out which side is the coated side?
    The easiest way to figure this out is to put your fingernail against the mirror. If there is a gap between your finger and its reflection (i.e., you can see the entire tip of your finger in the mirror), it is the uncoated side. If there is no gap between your finger and its reflection, it is the coated side.

    detect mirror side

    MIRRORED SIDE - no gap between finger and reflection

    UNCOATED SIDE - gap between finger and reflection

    How much light is transmitted through the mirror?
    Our two way mirrors allow about 11% of the light through, our TV mirrors allow about 25-65% to get through, and our teleprompter mirror allows 70% through. Please see the respective product pages for more details.

    How much do the mirrors weigh?
    1/4" Thick - 3.3 lbs per sq foot

    What is the "fingernail test" urban legend?
    An e-mail hoax circulating around the Internet reads that people should be careful at department stores, because many of them have two way mirrors installed in their restrooms and changing rooms to deter theft (a feature which is obviously ripe for abuse). If you put your fingernail up against the mirror as described above and there's no gap between your fingernail and the mirror, the email states that you are dealing with a two way mirror. This e-mail is obviously wrong, because a properly installed two way mirror has the non-coated side closer to the viewed subject. Therefore, it will appear exactly like a regular mirror when you put your fingernail against it. The best way to detect a two way mirror is with a laser pointer or a good flashlight. If you hold the laser pointer or flashlight against the surface of the mirror, you will faintly see the beam on the other side if it is a two way mirror.
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