Best One-way & Frosted Window Film for Privacy, Day & Night: Reflective, Opaque & more

Windows made of glass are the new thing. If you look at modern buildings, boats, and automobiles, you will see windows made of glass. One of the natural characteristics of these window glasses is that they are see-through. So what if you want to add a layer of privacy? What if you need to limit the amount of light passing through the window? Although you can use blinds or curtains at home to block light, it is not always the best solution and not the cheapest. Also, you cannot install blinds or curtains in automobiles.

An easy solution to these problems is to use a window film. You may not know what it is, but you have seen it many times in windows. It is a film-like layer that adds a tint or privacy. In terms of privacy options, there are several types available in the market, such as day and night, and one-way privacy.

If you would like to learn more, we will be discussing more in the next sections. Without further ado, let’s dive into the different ones.

window film being installed

What are they?

In the simplest terms, a window film is a thin layer made of the laminate, which attaches to the exterior or interior of a glass surface. These surfaces include but are not limited to buildings, homes, automobiles, boats, and airplanes.

Most options are self-adhesive, so you do not have to worry about how to attach them. Simply peel and stick it to wherever you want to attach it, and you are good to go.

It is important to know not all options are UV-blocking. Some of them are for decorative purposes only, while others serve as a complete window covering. A blackout window film completely blacks out the light. It promotes better sleep than ever in a cooler, darker room.

So you might be thinking about how it can do all sorts of things and drastically improve your living situation. A material called polyethylene terephthalate (PET) is what makes it possible. PET is a polymer resin, which is part of the polyester family. The material’s tensile strength, dimensional stability, clarify, and ability to accept different types of surfaces make it extremely versatile.

Classifying Them

We classify them in the following categories.

Construction Components

  • Ceramic
  • Dyed
  • Metalized
  • Nano
  • Pigmented


  • Architectural (Buildings, Homes, etc.)
  • Automotive
  • Marine

Substrate Type

  • Glass
  • Polycarbonate

Technical Performance

  • Safety
  • Solar Control
  • Security

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Like other things, they come in several types. They differ in terms of look and functionality. You can let your creative side do the talking by adding patterns and colors to the product, or you can go for the simple, minimalist way that provides the right amount of protection and privacy from harmful UV rays. Below are some of the options available for you.

Blackout Whiteout One-Way
Translucent Solar Decorative


From the name itself, a blackout film prevents all the light from passing through it. It provides two-way privacy from both the outside and the inside. From the inside, it appears completely black. From the outside, it gives a somehow reflective appearance. Since it reflects light from the outside, it serves as a heat control too.

It is best for people who work at night and sleep during the day. It is also popular with people whose rooms face a well-lit street. The downside with this type is that you cannot see through it no matter what you do. So if that is not an issue, then go ahead and give the blackout option a try. It provides 24-hours privacy, so you don’t have to worry about anything.


A whiteout film is similar to a blackout product in terms of privacy and opacity. It comes in white inside and outside. The primary difference between the two is the application. We use them to create separation in interior spaces, whereas blackout ones are primary applied in windows. Most people apply whiteout ones in bathrooms, retail environments, and meeting rooms.

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The translucent option sits in between privacy and light. It allows a bit of light to pass through it while still providing a level of privacy. When looking through a translucent film from the outside, you’ll see the effect of blurred images. Aside from a plain one, it is available in other shapes, colors, and patterns. You can apply a translucent product on any exterior or interior glass.


The purpose of a solar window product is to prevent ultraviolet rays from passing through. It blocks UV rays from entering the environment. In return, your skin is protected from any harm brought by exposure to UV rays.

Most glass windows can block about 40% of UV rays. However, certain types can block up to 99.9% of these UV rays, making it an effective solution. As a result, it regulates indoor temperatures, so rooms become warmer in winter and cooler in summer.

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The one-way mirror window option provides privacy protection during the day only. When looking into a one-way mirror from the outside during the day, you will only see a reflection of yourself. However, you can’t see in from the outside.

It is a different thing at night. When the lights inside the room are brighter than the lights outside the room, you can see right through it. In this case, you can opt to install blinds or curtains, which you can close at night to provide you privacy. However, business owners and commercial spaces sometimes prefer not to add blinds or curtains with their one-way mirror. The reason behind it is security. Intruders who try to break in at night can easily be seen from the outside.

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beautiful colored windows

Not all windows are boring. If you want to spice things up, you can go for a decorative one. Having one adds vibrance to your window. It works as art glass by scattering the light as it passes through the glass. There is a wide selection of decorative patterns, designs, and styles you can use to customize your room.

Most decorative ones are translucent, but they still reduce glare and provide a layer of UV protection. Should you think you will be moving it to a different window soon, you can opt for a reusable one. Decorative ones can also minimize static cling, which is when light objects stick with other objects.

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Things to Consider When Choosing the Best Option

There are a few things you need to consider when choosing the right one for you. When picking the best window film for your needs, you need to know what is important to you in terms of UV blocking, decorations, darkness/light, and privacy. These factors greatly affect the functionality, so choose carefully.

What to consider
Aesthetics Material UV Protection
Level of Privacy Fade Resistance


Some people like to add them for decorative purposes, which is the main reason for decorative ones. It adds a splash of elegance and style to the interior and exterior of the building. If you need to renovate old windows, but you are on a limited budget, adding decorative products may be the solution.

The wide array of colors, patterns, and prints can complement the mood and overall design of the interior. In the case of a dull interior, decorative versions can bump up the overall vibe. Of course, if colors, styles, and patterns are not your thing, plain ones are available.

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Generally, window films use polyethylene terephthalate (PET) as base material. In most cases, the difference is in the application type. The number of PET layers one uses affects the results. Polyester is durable. So it will hold up well in different moisture levels, cleaner solvents, and temperatures.

Although most options use PET, some manufacturers use polyvinyl chloride (PVC). The downside with this material is it poses health risks over time. This material contains chemical additives, which are especially harmful to children.

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Level of Privacy

They vary in the level of privacy they can provide. Whiteout ones and blackout products provide near 100% privacy. Translucent ones only obscure whatever is behind the window. Some decorative products provide some level of it, whereas others do not provide any at all. The first thing you need to figure out is knowing how much of it you need. Once you have this figured out, you can proceed to pick the right one for you.

Fade Resistance

Ever wondered why some items near your window have faded? UV rays cause floors, furniture, and even window treatments to fade. Films will not stop your appliances from fading, but it helps in slowing down.

UV Protection

Direct exposure to sunlight for a long period is dangerous to your health. This treatment blocks up to 99% of UV rays from passing through the window. When shopping for these products, make sure you check for their UV protection. Some manufacturers do not add UV protection to their products.

If you think about it, limiting heat can help in keeping your utility bills at a minimum. They can partially or fully block the sun’s heat from going in, which regulates the temperature inside the room. Cooler interior temperatures prevent the air conditioner from running for longer periods.

Installing it

Most of them use easy-to-remove self-adhesives or glue. Depending on the manufacturer, there may be differences in how to install it. However, these are the general guidelines that you should keep in mind.

  1. Before purchasing one, measure the dimensions of your window. Give a little allowance in case you make a mistake.
  2. Be sure the surface you are applying it on is flat and smooth.
  3. Cut it to the exact measurements. Remove the plastic in the adhesive side after.
  4. Spray water with soap on the window and the film’s backside.
  5. After spraying, it is time to place it on the glass. Start from the top of the window and move your way down.
  6. While the glass is still wet, adjust it until it aligns perfectly.
  7. Use a sponge or squeegee to remove any extra liquid. From the film’s center, squeeze extra liquid outside.
  8. Trim about two to three millimeters from the margins.
  9. Apply water to the surface again. Using a squeegee, remove any extra bubbles.

There are only some of the guidelines you need to consider when installing it. Before proceeding with the installation, always consult the instructions manual from the manufacturer. After applying the product, it is advisable not to clean with for at least one month.

Does it provide privacy?

window film being applied

These products are usually easy to install. Depending on the brand and model you purchase, some are even removable without leaving any marks. But the real question is, do they provide privacy? The short answer is yes, they do provide it but only up to a certain extent.

Day and Night

Day and night privacy 0nes provide privacy 100% of the day. A great example of one that provides day and night privacy is the blackout and whiteout options.

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One-way privacy products provide privacy on one side and clarity on the other side. Normally, those inside a room get a clear view of what is outside. Those on the outside won’t see what is inside. Hence, you can see out, not inside.

Does it work at night?

Yes, privacy films work at night. You can go for a day and night privacy products, which can either be a blackout one or a whiteout one.

What is the best one for privacy?

The best one for privacy is the blackout option or whiteout option. It provides 100% privacy during the day and night.

If you only need it to provide privacy during the day, then the one-way mirror material would be an excellent choice for you.

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Is there one you can see out but not inside?

Yes, there is! A one-way mirror film lets you see the outside when you are inside the room. However, people from the outside will not see what is inside the room. One thing to consider is that it only working during the day. At night, it becomes close to see-through.

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