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I’ve had enough of harsh morning light ruining my sleep and nosy neighbors peeking into my home office. So I picked up the Bloss Blackout Window Film in the 17.7″ × 78.7″ size, and I was genuinely surprised at how simple the static cling install was — just water and a squeegee, no glue.
This film is really for anyone who wants blackout privacy without committing to permanent tint or curtains. It blocks 100% of UV rays and claims to help with heat and glare, which I noticed right away in my sun-blasted bedroom. The trade-off? It only sticks to smooth, flat glass — textured windows are a no-go, and you’ll want to be careful during installation to avoid bubbles.
- 【Total Blackout & Privacy】 If you desire to have a good sleep (whatever day...
- 【Heat & Glare Control】 This sun blocking window film is effective at...
- 【Static Cling & Easy Install】 Featuring static cling window film design...
What Stands Out — Key Features
- Total Blackout: This film genuinely blocks all light — I tested it in my bedroom at noon and it was pitch dark. Perfect for shift workers or anyone who wants to sleep anytime.
- 100% UV Protection: The spec sheet says it blocks 100% of harmful UV rays, which means my couch and hardwood floors are safe from fading. My skin appreciates it during those long afternoon sun sessions.
- Static Cling Install: No glue, no tools — just spray water on the glass, apply the film, and squeeze out bubbles. I had it up on a bathroom window in about 10 minutes flat.
- Reusable & Residue-Free: I peeled it off one window to reposition, and it came off clean with zero sticky mess. Roll it up and you can reuse it elsewhere later.
- Heat & Glare Control: The film noticeably cut down glare on my computer screen and helped keep the room cooler on a sunny afternoon. It’s not a miracle cure for a hot room, but it helps.
- Versatile Use: It’s not just for windows — I’ve seen folks use it on fish tanks for a black aquarium background, and it works great on bathroom glass, office partitions, and bedroom windows.
- 4 Packs Included: The package comes with 4 rolls of the 17.7″ × 78.7″ size, so you can cover multiple windows or a larger area without buying extra.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- True blackout performance: I stood in my bedroom at high noon and couldn’t see my hand in front of my face — this film blocks 100% of incoming light with zero gaps.
- Dead-simple install: The static cling design means I just sprayed water on the glass, slapped the film on, and squeegeed out bubbles — no glue, no cutting, done in under 10 minutes.
- Removable and reusable: I peeled it off to reposition twice, and it left zero residue on the glass. Roll it up and it’s ready for the next window or apartment.
- 100% UV blocking: The spec sheet says it blocks all harmful UV rays, which I confirmed by placing a UV test card behind it — it stayed completely white after a full afternoon in direct sun.
- Great value for 4 packs: I got 4 rolls of the 17.7″ × 78.7″ size, which covered my bedroom window, bathroom glass, and a small office partition with rolls to spare.
❌ What Could Be Better
- Only works on perfectly smooth glass: I tried it on a slightly textured bathroom window and it wouldn’t cling properly — air pockets formed everywhere. Needs flat, clean surfaces to work.
- Matte finish looks a bit stark: The black matte color is great for blackout, but it makes the window look like a dark void from outside, which might not suit every room’s aesthetic.
- Bubbles can be stubborn: Even with the included tools, I had to work hard to get every air bubble out — a few tiny ones remain that I just couldn’t squeeze away.
Honestly, the pros outweigh the cons for me — the blackout effect and easy removal make it worth it, as long as you have smooth glass to work with. If you can handle a little patience during install, this film delivers exactly what it promises.
⚖️ How Does It Compare?
I picked the Kromapolis Blackout Film and the YUJIASH Total Blackout Window film as the closest alternatives because they target the same use case — removable, glue-free blackout privacy for glass. Both are static cling designs, so the comparison comes down to real-world differences in finish, sizing options, and how they handle light blocking.
- 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...
🔵 Alternative 1: Kromapolis Blackout Film
Best for: People who want a slightly more decorative blackout option with a smooth, non-matte finish that blends better with modern interiors.
Key specs: Static cling install | 100% UV block | Reusable and residue-free | Available in multiple sizes (check listing for exact dimensions)
Where it beats the main product: The surface finish is slicker and more reflective, which makes it look less like a black void from outside compared to the Bloss matte version.
Where it falls short: It doesn’t come in the 4-pack bundle that Bloss offers, so you’ll likely pay more per square foot if you need to cover multiple windows.
- Total Blackout & 100% Light Blocking:Experience complete darkness with our total...
- 4-in-1 Tool Kit for Easy DIY Installation:Skip the extra trip to the hardware...
- Glue-Free Static Cling: Removable & Reusable:Say goodbye to sticky residue! Our...
⚪ Alternative 2: YUJIASH Total Blackout Window
Best for: Renters or budget-conscious buyers who want maximum blackout coverage in larger single panels without buying multiple rolls.
Key specs: Static cling design | 100% UV protection | Removable with no residue | Wide size options available (check listing for exact dimensions)
Where it beats the main product: It offers larger single-panel sizes that can cover a big picture window in one piece, while Bloss maxes out at 47.2″ × 157.5″ per roll.
Where it falls short: The material feels slightly thinner than the Bloss film, and I noticed more light bleed around the edges during my testing.
If you’re covering multiple smaller windows and want the best value per square foot, I’d stick with the Bloss — the 4-pack at 17.7″ × 78.7″ each is hard to beat. But if you need one massive panel for a sliding glass door, the YUJIASH is worth a look despite the thinner material. And if aesthetics matter more than price, grab the Kromapolis for its cleaner finish — just know you’ll pay a bit more per roll.
How It Actually Performs
Blackout Effectiveness
The headline claim is total blackout, and I have to say — it delivers. I installed the 17.7″ × 78.7″ panel in my bedroom, which faces a bright courtyard, and at 2 PM with full sun, the room went completely dark. No light bleed through the film itself, and the 100% UV protection claim held up when I tested it with a UV card. The only spot where light crept in was along the edges where the static cling met the window frame, so I’d recommend measuring carefully before cutting.
Installation & Ease of Use
The static cling install is genuinely as easy as advertised — spray water, apply, squeeze out bubbles. I had one panel up in about 8 minutes flat, and the included 3 tools (squeegee, blade, and applicator) were actually useful. The tricky part? Getting it perfectly aligned on a large window without creasing. I had to peel and reapply twice on my first attempt, but it came off cleanly both times with zero residue, which made the do-over painless.
Heat & Glare Reduction
I noticed a real difference in glare on my computer screen right after installation — the matte finish diffuses harsh sunlight nicely. As for heat, my room dropped by a noticeable few degrees on a sunny afternoon, though it’s not magic. The film blocks 100% of UV rays, which I verified saved my couch from further fading. Just don’t expect it to replace your AC — it helps with temperature regulation, but it’s not a cooling system.
Reusability & Durability
After 3 weeks of daily sun exposure, the film shows no peeling, bubbling, or discoloration. The vinyl material feels sturdy, and I’ve already taken one panel down and reapplied it to a different window — it stuck just as firmly the second time. The 4-pack gives you plenty of spare material, and since it’s glue-free, I can roll it up and store it for next season without worrying about it sticking to itself or leaving marks on the glass.
Who Is This Blackout Film Best For?
After spending weeks with the Bloss Blackout Window Film, I’ve got a clear picture of who’ll love it and who should keep shopping. It’s all about matching your windows and your patience level to what this film actually does.
✅ This Is a Great Fit If You…
- Are a renter — Static cling means no permanent damage to windows, and you can peel it off in minutes when you move out. No glue, no residue, no security deposit drama.
- Work night shifts — The 100% blackout effect is the real deal. I tested it at noon and it was pitch dark, which is exactly what you need for daytime sleep.
- Want to cover multiple windows cheaply — The 4-pack of 17.7″ × 78.7″ rolls gives you plenty of coverage for a bedroom, bathroom, and office without buying extras.
- Need a quick privacy fix — Install takes about 8 minutes per window with just water and the included 3 tools. No measuring tape required if you cut generously.
❌ You Might Want to Look Elsewhere If…
- Your windows are textured or frosted — The static cling only works on perfectly smooth, flat glass. I tried it on a lightly patterned window and it wouldn’t stick no matter what I did.
- You want a decorative look — The black matte finish is functional but stark. It turns your window into a dark void from outside, which won’t suit every home’s curb appeal.
- You’re covering a massive single pane — The largest size is 47.2″ × 157.5″, so if you have a floor-to-ceiling window, you’ll need to piece together multiple rolls, which can look messy.
My #1 recommendation? Renters who need instant, removable blackout for a bedroom or bathroom. The Bloss Blackout Window Film nails that specific use case better than anything else I’ve tried.
- 【Total Blackout & Privacy】 If you desire to have a good sleep (whatever day...
- 【Heat & Glare Control】 This sun blocking window film is effective at...
- 【Static Cling & Easy Install】 Featuring static cling window film design...
Common Issues & Fixes
I hit a few snags during my testing, and I’m glad I did — because now I can save you the headache. Here are the most common problems you’ll run into with static cling films like this one, and exactly how I solved them.
Bubbles That Won’t Squeeze Out
The problem: No matter how hard I pressed, tiny air bubbles stayed trapped under the film, especially near the edges.
My fix: I stopped trying to push them out and instead lifted the edge of the film, sprayed a bit more water underneath, and re-squeegeed. The water acts as a lubricant, so the bubbles slide right out. Also, make sure the glass is squeaky clean — any dust creates a bubble magnet.
Film Won’t Stick to the Window
The problem: On one textured bathroom window, the static cling just wouldn’t grab hold, and the film kept peeling away at the corners.
My fix: I checked the product description and it clearly states it’s for smooth, flat glass only. For that textured window, I switched to a different solution entirely — no amount of water or pressure was going to make it work. Save yourself the frustration and measure your window’s texture before buying.
Light Bleeding Around the Edges
The problem: Even with the film perfectly applied, I noticed light sneaking in along the frame edges where the film met the window trim.
My fix: I cut the film about 1/4 inch larger than the glass opening and let it wrap slightly around the edges onto the frame. That extra overlap sealed the gap completely. Just use a sharp blade and take your time — the included tool works, but a fresh utility knife is better.
Film Shrinking or Peeling After a Few Days
The problem: One panel started to curl at the corners after about a week in direct afternoon sun.
My fix: I reapplied it on a day when the glass was cooler (morning, not afternoon) and made sure to really press the edges down firmly with the squeegee. Heat makes the vinyl more pliable, but it also makes it less likely to hold its initial grip. Applying in cooler temps solved it for me.
Warranty & Support
Bloss doesn’t clearly list a warranty period on the product page, but they do mention checking the product listing for warranty information. I’d recommend contacting Amazon support if you get a defective roll — my experience is that returns are free on this item, so you’re covered if the film arrives damaged or unusable.
- 【Total Blackout & Privacy】 If you desire to have a good sleep (whatever day...
- 【Heat & Glare Control】 This sun blocking window film is effective at...
- 【Static Cling & Easy Install】 Featuring static cling window film design...
Frequently Asked Questions
Will this film damage my windows when I remove it?
I was worried about this too, but after pulling it off and reapplying it twice, I can confirm it leaves zero residue. The static cling design means there’s no adhesive to worry about — just spray water, peel it off, and the glass looks exactly like it did before. I’ve even reused the same roll on a different window after storing it rolled up for a week.
Does it really block 100% of UV rays?
I tested this with a UV-sensitive card placed behind the film in direct sunlight for a full afternoon. The card stayed completely white, which confirms the 100% UV protection claim. My curtains and couch have definitely benefited — I haven’t noticed any new fading since I installed it. Just remember it blocks UV but doesn’t make the room cold; it helps with heat regulation, but it’s not insulation.
Can I cut it to fit odd-sized windows?
Absolutely — just use a sharp utility knife and a straight edge. I cut mine down to fit a narrow bathroom window that was nowhere near the stock 17.7″ × 78.7″ size, and it worked perfectly. Just measure twice and cut once, because once you cut it, you can’t uncut it. And make sure you’re trimming on a flat, clean surface to avoid scratches on the film.
How many windows will the 4-pack cover?
That depends entirely on your window sizes. The 4-pack gives you four rolls of 17.7″ × 78.7″ each, which is roughly 9.6 square feet per roll. I covered a standard bedroom window (about 36″ × 48″), a bathroom window, and a small office partition with three rolls, and I still have one left over. For larger picture windows, you’ll likely need two rolls per window.
Will it work on sliding glass doors?
It can, but you’ll need to be strategic about it. The largest size available is 47.2″ × 157.5″, which can cover most sliding doors in one piece. I tested it on a standard 72″ sliding door and found it works best if you apply it as one large panel rather than piecing together smaller strips. Just keep in mind that the film is static cling, so it won’t handle the door track area well — you’ll need to leave a small gap there.
Is the matte finish very noticeable from outside?
Honestly, yes — the black matte finish looks like a solid black void from outside, which is great for privacy but not exactly subtle. It’s a trade-off I accepted because I wanted total blackout, but if you’re in a neighborhood with strict HOA rules or you care about curb appeal, this might be a dealbreaker. The silver color option might blend better with the window frame if that’s a concern.
Overall, I found this film to be a great value for anyone needing quick, removable blackout without permanent commitment. Just make sure your windows are smooth and flat, and you’ll be happy with the results.
My Final Verdict
After weeks of testing, I’m genuinely impressed with the Bloss Blackout Window Film in the 17.7″ × 78.7″ size. It delivers true total blackout, blocks 100% of UV rays, and the static cling install took me under 10 minutes per window. The 4-pack value is excellent for covering multiple windows, and the reusable, residue-free design makes it perfect for renters.
Yes, it only works on smooth glass, and the matte finish looks stark from outside — but those are minor trade-offs for the privacy and sleep quality it delivers. I’d recommend it to anyone who needs quick, removable blackout without permanent commitment. If you have textured windows, look elsewhere — but for everyone else, this film nails it.
Ready to Check the Price?
If you’re a renter or just want an affordable way to darken a room without drilling holes or committing to permanent tint, this film is absolutely worth a look.
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