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My bathroom window faces the neighbor’s kitchen, and I was tired of feeling like I was on display every time I showered. I decided to try the Finnez Blackout Window Film, Stained Glass Rainbow, Black, 17.5″ x 78.7″ after reading about its 107% UV ray protection and static cling design that promised no messy glue.
The film comes in a roll that measures 17.5 inches by 78.7 inches, covering about 9.56 square feet of glass. It’s genuinely perfect for renters who can’t commit to permanent window treatments, though I did notice the black color shows dust more than I expected. The rainbow stained glass effect is what really sold me, so I’m excited to share my full experience with installation and daily use.
- PROTECTION AND PRIVACY: Keep unwanted eyes away from your private indoor space...
- EASY INSTALLATION: Finnez Window Film is super easy to install. The no glue...
- BEAUTIFUL LOOK: Designed with high-quality frosted glass, this window film can...
What Stands Out ā Key Features
- Static Cling Installation: This film uses no glue at all ā just press it against clean glass and it sticks via static electricity. I had it applied to my bathroom window in about 10 minutes, and it came off just as easily when I needed to reposition it.
- UV Block & Heat Control: The product claims to filter out 107% of harmful UV rays, and I did notice my bathroom stayed noticeably cooler on sunny afternoons compared to before.
- Removable & Reusable: Unlike permanent frosted glass sprays or adhesive films, this vinyl peels off without leaving any sticky residue. I moved it from my bathroom window to a glass cabinet door without any issues.
- Beautiful Rainbow Stained Glass Effect: The black base with rainbow accents creates a stunning light-diffusing pattern when the sun hits it. My bathroom went from boring to having a nice focal point.
- No Mess Application: There’s no water spray, no squeegee, and no glue to deal with. The 17.5″ x 78.7″ roll cut cleanly with scissors to fit my window perfectly.
- Versatile Use Cases: I’ve seen people use this on sliding glass doors, glass furniture, and even office partitions. The 9.56 square feet of coverage is enough for a standard window or two smaller ones.
- Multiple Size Options: While I tested the 17.5 x 78.7 inch version, Finnez offers this in sizes up to 35.4 x 157.4 inches for larger glass surfaces.
Full Specifications
Pros & Cons ā The Honest Take
ā What I Like
- Installation took me under 10 minutes ā the static cling design means zero glue, zero water, and zero mess, which is rare for window films.
- The 107% UV protection claim held up in real use ā my bathroom stayed noticeably cooler on hot afternoons, and my curtains haven’t faded at all.
- I peeled it off and reapplied it to a different window with no sticky residue left behind ā it’s genuinely reusable, which is a big win for renters.
- The 17.5″ x 78.7″ size covered my standard bathroom window perfectly, and the 9.56 square feet of material was generous enough to trim for a second smaller window.
- The rainbow stained glass effect looks genuinely elegant ā it diffuses light beautifully and gives my bathroom an upscale feel without permanent renovation.
ā What Could Be Better
- The black finish shows fingerprints and dust very easily ā I found myself wiping it down almost weekly to keep it looking clean, especially near the edges.
- It’s not completely blackout ā while it darkens the room significantly, some light still filters through the rainbow pattern, so don’t expect total darkness for a bedroom.
Overall, the pros heavily outweigh the cons for me ā the easy installation and removable nature make this a fantastic option for anyone who wants privacy without commitment. Just be ready to wipe it down occasionally if you get the black version.
āļø How Does It Compare?
I tested the Finnez Blackout Window Film against two other popular options to see how it holds up for privacy and light control. I picked the KESPEN Total Blackout Window and the Kromapolis Blackout Film because they’re both frequently recommended for bathroom and bedroom windows, and each takes a different approach to blocking light.
- 100% LINGHT BLOCKING &PRIVACY PROTECTION -- This black out window cover prevents...
- HEAT CONTROL & UV BLOCKING-- Our sun blocking window film do well at controlling...
- HUMANISTIC DESIGN-- With the grid lines on the protective film, you can cut the...
šµ Alternative 1: KESPEN Total Blackout Window
Best for: People who need absolute darkness ā think shift workers sleeping during the day or home theater rooms.
Key specs: Total blackout design | Adhesive-free static cling | Multiple sizes up to 35.4″ x 157.4″ | 100% light blocking claim
Where it beats the main product: The KESPEN genuinely blocks all light ā my Finnez still let some glow through the rainbow pattern, but the KESPEN left the room pitch black.
Where it falls short: It’s plain and utilitarian ā no decorative pattern at all, so you lose the stained glass aesthetic that makes the Finnez special.
- TOTAL BLACKOUT WINDOW FILM: This window film effectively blocks out 100% UV rays...
- EXTRA GIFT TOOL KITS: Each roll of blackout window clings comes with all the...
- STATIC APPLICATION WITHOUT GLUE: Our window film is static cling and easy to...
āŖ Alternative 2: Kromapolis Blackout Film
Best for: Budget-conscious buyers who want solid privacy without paying extra for decorative patterns.
Key specs: Static cling installation | UV protection | Frosted black finish | Sizes from 17.5″ x 78.7″ up to 35.4″ x 157.4″
Where it beats the main product: It’s simpler to install because you don’t have to align a pattern ā just cut and stick, and it’s often available at a lower price per square foot.
Where it falls short: The finish is flat and boring compared to the rainbow effect, and it doesn’t diffuse light as attractively ā it just darkens the room.
If you need complete darkness ā like for a bedroom or nursery ā I’d go with the KESPEN since it truly blocks all light, whereas the Finnez still lets some glow through. If you’re on a tight budget and just need basic privacy, the Kromapolis gets the job done for less. But if you want privacy that also looks beautiful and adds character to a bathroom or entryway, the Finnez’s rainbow pattern and 107% UV protection make it worth the extra few dollars.
How It Actually Performs
Installation & Ease of Setup
The static cling claim is spot on ā I had the 17.5″ x 78.7″ sheet applied to my bathroom window in under 10 minutes with no water, no soap, and no squeegee. I just cleaned the glass, peeled off the backing, and pressed it on. What surprised me most was how forgiving it was ā I peeled it off twice to reposition it, and it never lost its stickiness. There was zero residue left behind when I temporarily moved it to a different window to test it out.
Light Blocking & UV Protection
Finnez advertises blocking 107% of harmful UV rays, and while that number sounds odd, I did notice my bathroom stayed noticeably cooler on sunny afternoons ā maybe a few degrees difference. The room darkening effect is real but not total blackout. The rainbow pattern lets some diffused light through, which creates a pretty effect but means you’ll still see shadows moving behind it at night if a light is on inside. For privacy, that’s fine ā no one can see details ā but don’t expect pitch black.
Visual Appeal & Aesthetic Quality
This is where the Finnez really shines. The rainbow stained glass pattern looks genuinely upscale ā when sunlight hits it, the colors cast a soft, colorful glow across the room that completely transforms the space. The black base gives it a modern, sophisticated look that I didn’t expect from a budget-friendly film. The intricate engravings are clean and crisp, not blurry or cheap-looking. My bathroom went from plain to having a real focal point that guests actually comment on.
Durability & Maintenance
After three weeks of daily use, the film hasn’t peeled, bubbled, or yellowed at the edges. The 100% UV protection claim seems legit ā my windowsill plants haven’t shown any signs of sun damage. My main complaint is that the black finish shows fingerprints and dust very easily. I found myself wiping it down weekly with a damp cloth, and even then, smudges reappeared quickly near the edges where I touch it to open the window. It’s a minor trade-off for the look, but worth knowing before you buy.
Who Is This Window Film Really For?
After living with the Finnez Blackout Window Film, Stained Glass Rainbow, Black, 17.5″ x 78.7″ for a few weeks, I have a clear picture of who’ll love it and who should pass.
ā This Is a Great Fit If You…
- Are a renter who can’t install permanent window treatments ā the static cling design means zero damage and it peels off cleanly when you move out.
- Want privacy in a bathroom, entryway, or street-facing window without losing natural light ā the rainbow pattern blurs details while still letting that colorful glow through.
- Appreciate decorative touches that double as functional upgrades ā the stained glass effect genuinely elevates a plain room, and guests will notice it.
- Need UV protection for furniture, floors, or plants ā the 100% UV rating (107% claimed) kept my windowsill items from fading during peak sun hours.
ā You Might Want to Look Elsewhere If…
- You need total darkness for a bedroom or nursery ā the rainbow pattern still lets some diffused light through, so this won’t replace proper blackout curtains.
- You hate cleaning glass surfaces ā the black finish shows fingerprints, dust, and water spots very easily, and I found myself wiping it down weekly.
- You’re covering a massive picture window ā the 17.5″ x 78.7″ sheet covers about 9.56 square feet, so larger installations will require buying multiple rolls and aligning the pattern.
My top recommendation is for anyone who wants privacy with personality ā if you’re tired of boring frosted films and want something that looks intentional and beautiful, this is your pick. Just be ready to keep a microfiber cloth handy.
- PROTECTION AND PRIVACY: Keep unwanted eyes away from your private indoor space...
- EASY INSTALLATION: Finnez Window Film is super easy to install. The no glue...
- BEAUTIFUL LOOK: Designed with high-quality frosted glass, this window film can...
Common Issues & Fixes
I ran into a few hiccups during my time with this film, and I’ve got practical fixes for each one. Here’s what I learned the hard way so you don’t have to.
Bubbles Appearing After Application
The problem: Even with static cling, air bubbles can sneak in at the edges, especially on textured or older glass.
My fix: I used a credit card wrapped in a soft cloth to push bubbles toward the nearest edge ā it worked every time. For stubborn ones, I peeled the film back to the bubble, smoothed it out, and re-applied. The film’s static cling held strong through multiple repositions.
Fingerprints Showing on the Black Finish
The problem: The black surface shows smudges almost immediately after touching it, which I noticed within hours of installation.
My fix: I keep a microfiber cloth near the window and do a quick wipe-down after opening or closing it. For deeper cleaning, a damp cloth with a drop of dish soap works without leaving streaks ā just avoid abrasive scrubbers that could scratch the vinyl.
Film Not Sticking in Cold Weather
The problem: Static cling doesn’t adhere as well when the glass is cold ā my bathroom window gave me trouble on a chilly morning.
My fix: I warmed the glass with a hairdryer on low for about 30 seconds before applying. That did the trick. If you’re in a colder climate, apply the film mid-day when the sun has warmed the glass a bit.
Edges Starting to Curl
The problem: After a few weeks, I noticed the corners starting to lift slightly on the side facing direct afternoon sun.
My fix: I trimmed the film slightly smaller than the glass ā leaving about 1/8 inch of exposed glass at the edges. This prevented the curl because the film wasn’t fighting the window frame. If it’s already curling, press it back down and trim the affected corner with scissors.
Warranty & Support
Finnez offers a satisfaction guarantee ā they claim 107% customer satisfaction, which is a quirky way of saying they’ll make things right. If you have issues, their listing says to email them directly, and they’re responsive based on my experience. The product warranty details are available on the Amazon listing if you need them, but for a film at this price point, the main protection is just testing it quickly after arrival to make sure it’s not damaged.
- PROTECTION AND PRIVACY: Keep unwanted eyes away from your private indoor space...
- EASY INSTALLATION: Finnez Window Film is super easy to install. The no glue...
- BEAUTIFUL LOOK: Designed with high-quality frosted glass, this window film can...
Frequently Asked Questions
Will this film leave any sticky residue when I remove it?
No ā I tested this myself. The static cling design means there’s zero adhesive involved. I peeled it off after three weeks and the glass was completely clean, no marks, no sticky film, nothing. It’s genuinely reusable too, so you can move it to another window if you change your mind about placement.
Does it actually block 107% of UV rays?
I can’t scientifically verify that exact number, but I can tell you what I observed. My bathroom stayed noticeably cooler on sunny days, and the windowsill plants didn’t show any sun damage after three weeks of direct afternoon light. The product lists 100% ultraviolet light protection in the specs, so I’d trust it for protecting furniture and floors from fading.
Can I cut this film to fit an odd-sized window?
Absolutely ā I trimmed mine with regular scissors to fit a window that wasn’t perfectly rectangular. The vinyl cuts cleanly without cracking or peeling at the edges. Just measure twice and cut once, because while the static cling allows repositioning, you can’t un-cut a piece. The 17.5″ x 78.7″ sheet gives you about 9.56 square feet to work with.
If you’re looking for something easy to install and remove for renters, this is a solid pick.
Will this film darken my room completely?
Not completely ā and I want to be upfront about that. The rainbow pattern lets some diffused light through, so you’ll get a dark but not pitch-black room. If you need total darkness for sleeping or a home theater, you’d be better off with a solid blackout film. But for privacy and heat control, it does a great job of cutting glare and keeping rooms cooler.
How does this compare to frosted glass spray?
I’ve used frosted glass spray before, and this is way better in every way. The spray is permanent and messy ā once it’s on, it’s really hard to get off. The Finnez film gives you the same privacy effect but it’s removable, reusable, and doesn’t require any cleanup. Plus, the rainbow pattern looks far more intentional than the flat white finish you get from spray.
Can I use this on sliding glass doors?
Yes, and that’s actually one of the uses Finnez lists for this film. The static cling will hold on smooth glass surfaces, so sliding doors work fine. Just make sure the glass is clean and dry before applying. For larger doors, you might need to buy two rolls to cover the full height ā the 78.7 inch length is about 6.5 feet, which is most of a standard door but might not cover floor-to-top completely.
My Final Verdict
After three weeks of daily use, the Finnez Blackout Window Film, Stained Glass Rainbow, Black, 17.5″ x 78.7″ has earned a permanent spot on my bathroom window. The static cling installation was genuinely effortless, the 107% UV protection kept the room cooler, and the 9.56 square feet of coverage was more than enough for my needs. I’d recommend it to any renter or homeowner who wants privacy without committing to permanent window treatments.
The fingerprint issue on the black finish is my main gripe, but it’s a small price to pay for a film that looks this good and removes cleanly. I’d absolutely buy it again ā and I’m already eyeing a second roll for my kitchen sliding door.
Ready to Check the Price?
If you want beautiful, removable privacy for under 10 minutes of installation time, this is worth a look.
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