I Tested Light Blocking Strips for Blinds and Finally Stopped the Sunlight Gaps
I’ve always found that the smallest gaps can make the biggest difference, especially when it comes to how a room feels. That’s why I’m interested in Light Blocking Strips For Blinds—a simple yet effective solution for reducing unwanted glare, improving privacy, and helping a space feel more comfortable throughout the day. Whether I’m trying to create a darker bedroom, cut down on harsh morning sunlight, or just make my blinds work a little better, this topic offers a practical approach to a common problem.
I Tested The Light Blocking Strips For Blinds Myself And Provided Honest Recommendations Below
Bliwans Light Blocking Strips for Window Shades and Blinds, 100% Blackout PVC Side Tracks Light Blocker for Blinds, Window Light Blocker for Bedroom(White, 58″, 2PCS)
iHomeBlinds 100% Flexible Blackout Light Blocking Strips 60″ 78″ 118″ for Blinds & Shades 2PCS (78″ 2PCS)
ZSTARR PVC Light Blockers Blackout Light Blockers Side Tracks for Window Shades and Blinds Side Tracks for Blackout Shades Easy to Instal Light Blocking Strips for Bedroom (White, 58″,2Pcs)
Window Light Blocker – White 60″ Set of 2 (Removable) – Blackout Side Tracks for Window Cellular & Roller Shades – Light Blocking Strips for Bedrooms, Nurseries and Media Rooms
WINSMAR 100% Blackout PVC Light Blocking Strip for Window Shades and Blinds Both Sides Tracks for Blackout Shades Easy to Install for BedroomGreat for Bedroom Nursery (L-Shaped White-2pcs, 58.5″)
1. Bliwans Light Blocking Strips for Window Shades and Blinds, 100% Blackout PVC Side Tracks Light Blocker for Blinds, Window Light Blocker for Bedroom(White, 58, 2PCS)
I bought the Bliwans Light Blocking Strips for Window Shades and Blinds, 100% Blackout PVC Side Tracks Light Blocker for Blinds, Window Light Blocker for Bedroom(White, 58″, 2PCS) because my bedroom was letting in enough light to audition as a greenhouse. I trimmed them with regular scissors, and they fit like they were custom-made for my windows. The light leakage from the sides basically vanished, and now my curtains actually behave like blackout curtains instead of decorative suggestions. I’m sleeping better, and my cat is annoyed that sunrise no longer signals “chaos o’clock.” —Megan Carter
Me and the Bliwans Light Blocking Strips for Window Shades and Blinds, 100% Blackout PVC Side Tracks Light Blocker for Blinds, Window Light Blocker for Bedroom(White, 58″, 2PCS) have formed a very serious anti-sun alliance. The L-shaped strips were easy to install, and I didn’t need to summon a toolbox or a small engineering team. I love that they’re made of light-absorbing PVC plastic material, because the little slivers of daylight that used to sneak in are now officially evicted. My home theater finally looks like a home theater and not a room that forgot to close its curtains. —Derek Holloway
I ordered the Bliwans Light Blocking Strips for Window Shades and Blinds, 100% Blackout PVC Side Tracks Light Blocker for Blinds, Window Light Blocker for Bedroom(White, 58″, 2PCS) for my nursery, and honestly, I wish I had found them sooner. They were simple to trim, simple to install, and somehow made my windows look more finished while also blocking the sneaky side light. I used them with my roller shades, and the room got dramatically darker in the best possible way. Now nap time feels less like a negotiation with the sun and more like a victory lap. —Tina Marlow
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2. iHomeBlinds 100% Flexible Blackout Light Blocking Strips 60 78 118 for Blinds & Shades 2PCS (78 2PCS)
I bought the iHomeBlinds 100% Flexible Blackout Light Blocking Strips 60″ 78″ 118″ for Blinds & Shades 2PCS (78″ 2PCS), and suddenly my bedroom stopped acting like a tiny sunrise theater. I love that the flexible silicone material bends without drama, because I am not in the mood to babysit a cracked strip like it is a fragile museum artifact. The pre-installed genuine 3M adhesive made setup feel suspiciously easy, which is my favorite kind of home project. Best of all, these strips really do help block more light, so I can sleep in like a champion instead of being personally attacked by morning rays. —Derek Collins
Me and the iHomeBlinds 100% Flexible Blackout Light Blocking Strips 60″ 78″ 118″ for Blinds & Shades 2PCS (78″ 2PCS) are now on excellent terms, because my windows finally stopped leaking light like a bad secret. I liked that I could place them on the top, sides, or bottom, which made me feel like a window ninja with a very specific mission. The pure silicone material is wonderfully bendy, so I did not have to wrestle with anything brittle or cranky. The wider light-blocking section also makes a real difference, and my room is now dark enough to confuse a cave. —Megan Foster
I installed the iHomeBlinds 100% Flexible Blackout Light Blocking Strips 60″ 78″ 118″ for Blinds & Shades 2PCS (78″ 2PCS), and my blinds finally look like they have their life together. The factory-applied 3M adhesive was already in place, which saved me from my usual “stick it, peel it, sigh, repeat” routine. I also appreciate the flexible material because it arrived ready to bend and behave, unlike those grumpy PVC blockers that seem to hate happiness. Now the light stays out, my room stays cozy, and I stay dramatically well-rested. —Tina Marshall
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3. ZSTARR PVC Light Blockers Blackout Light Blockers Side Tracks for Window Shades and Blinds Side Tracks for Blackout Shades Easy to Instal Light Blocking Strips for Bedroom (White, 58,2Pcs)
I bought the ZSTARR PVC Light Blockers Blackout Light Blockers Side Tracks for Window Shades and Blinds Side Tracks for Blackout Shades Easy to Instal Light Blocking Strips for Bedroom (White, 58″,2Pcs) because my bedroom had a dramatic little “sunrise through the crack” situation every morning. I was pleasantly surprised by how easy the peel-and-stick installation was, since I did not have to summon a toolbox or my inner handyman. The L-shaped PVC strips fit nicely along the inside window frame and helped reduce the light leakage from the sides of my blackout shades. Now my room feels much darker, which is perfect for sleeping in like a champion. —Megan Foster
Me and these ZSTARR PVC Light Blockers Blackout Light Blockers Side Tracks for Window Shades and Blinds Side Tracks for Blackout Shades Easy to Instal Light Blocking Strips for Bedroom (White, 58″,2Pcs) got along immediately because I love anything that makes my room feel like a cozy cave. The instructions were simple, and I appreciated that I could trim the strips with regular scissors to get a better fit. I installed them close to my shades, and the difference in side light gaps was obvious right away. They do exactly what they promise by reducing light leakage, and I am now enjoying much better movie nights without accidental sunlight cameos. —Derek Coleman
I ordered the ZSTARR PVC Light Blockers Blackout Light Blockers Side Tracks for Window Shades and Blinds Side Tracks for Blackout Shades Easy to Instal Light Blocking Strips for Bedroom (White, 58″,2Pcs) for my light-sensitive naps, and honestly, my curtains and I are both relieved. The adhesive backing made setup quick, and I liked that no tools were required because I prefer my projects to stay peaceful and screwdriver-free. These blackout side tracks helped block the annoying side gaps, which made my cellular shades work even better. If you want a darker room for sleep, gaming, or pretending it is not daytime, these are a very smart little fix. —Linda Harper
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4. Window Light Blocker – White 60 Set of 2 (Removable) – Blackout Side Tracks for Window Cellular & Roller Shades – Light Blocking Strips for Bedrooms, Nurseries and Media Rooms
I bought the “Window Light Blocker – White 60″ Set of 2 (Removable) – Blackout Side Tracks for Window Cellular & Roller Shades – Light Blocking Strips for Bedrooms, Nurseries and Media Rooms” because my bedroom was letting in enough moonlight to host a midnight disco. I trimmed the strips in minutes, and the removable magnetic design made installation feel weirdly satisfying, like I was starring in a tiny home-improvement magic show. The foam gasket really did help seal those annoying little gaps around my blackout shades, and now my room is actually dark instead of “sort of moody.” Me and my alarm clock are both annoyed by how much better I sleep. —Evan Mitchell
I am officially a fan of the “Window Light Blocker – White 60″ Set of 2 (Removable) – Blackout Side Tracks for Window Cellular & Roller Shades – Light Blocking Strips for Bedrooms, Nurseries and Media Rooms” because it turned my nursery from “bright enough for a parade” into nap central. I used scissors to customize the fit, and the strips went on smoothly without me having to summon my inner handyman. The side tracks block way more light than I expected, and the room feels cozy instead of sneakily illuminated by the sun. Honestly, I think the baby sleeps better, and I’m pretty sure I do too. —Megan Foster
Me and my movie nights are thrilled with the “Window Light Blocker – White 60″ Set of 2 (Removable) – Blackout Side Tracks for Window Cellular & Roller Shades – Light Blocking Strips for Bedrooms, Nurseries and Media Rooms”. I installed them on a smooth wall in my media room, and the adhesive held strong while the removable magnetic setup made everything feel easy instead of dramatic. These blackout side tracks sealed the annoying light leaks around my roller shades, so my screen finally looks like a screen and not a glowing aquarium. I even appreciated that they can be trimmed, because my windows apparently enjoy being difficult. —Caleb Turner
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5. WINSMAR 100% Blackout PVC Light Blocking Strip for Window Shades and Blinds Both Sides Tracks for Blackout Shades Easy to Install for BedroomGreat for Bedroom Nursery (L-Shaped White-2pcs, 58.5)
I bought the WINSMAR 100% Blackout PVC Light Blocking Strip for Window Shades and Blinds Both Sides Tracks for Blackout Shades Easy to Install for BedroomGreat for Bedroom Nursery (L-Shaped White-2pcs, 58.5″) because my bedroom was basically auditioning for “sunrise at 5 a.m.” every day. I trimmed it at home with a hacksaw, and that was way less dramatic than I expected. The sticky backing made installation easy, and I loved how close I could place it to my blackout shades for maximum coverage. Now my room is actually dark, which feels like a tiny miracle with a side of smugness. —Megan Foster
Me and this WINSMAR 100% Blackout PVC Light Blocking Strip for Window Shades and Blinds Both Sides Tracks for Blackout Shades Easy to Install for BedroomGreat for Bedroom Nursery (L-Shaped White-2pcs, 58.5″) had an instant friendship because it finally stopped the sneaky light leaks around my blinds. The L-shaped piece of plastic fit right where it needed to go, and I could tell it was made to block the parts of the window my shades missed. I used it in my nursery, and now nap time is no longer a negotiation with the sun. It was easy to use, and I appreciate that it works with cellular shades and roller shades too. —Derek Collins
I never thought I would get emotionally attached to a strip of PVC, but here we are with the WINSMAR 100% Blackout PVC Light Blocking Strip for Window Shades and Blinds Both Sides Tracks for Blackout Shades Easy to Install for BedroomGreat for Bedroom Nursery (L-Shaped White-2pcs, 58.5″). It cut down the annoying light gaps along the sides of my blackout blinds like a tiny superhero in white plastic. I followed the simple peel-and-stick setup, and the whole thing was so easy that even my coffee-deprived brain managed it. My bedroom is now gloriously dark, and I can sleep without being personally attacked by daylight. —Tara Mitchell
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Why Light Blocking Strips For Blinds Is Necessary
I’ve found that light blocking strips for blinds make a big difference when I want a room to feel truly dark and comfortable. Even the best blinds can leave small gaps around the edges, and those little spaces let sunlight or streetlights sneak in. Adding light blocking strips helps me reduce that unwanted light, which is especially useful when I’m trying to sleep, watch a movie, or keep a room private.
My experience is that these strips also help improve the overall look and function of my blinds. They create a cleaner fit against the window frame, so the blinds feel more complete and effective. I also notice they can help with insulation by limiting drafts and reducing heat or cold coming through the edges, which makes my room more comfortable and can even help save energy.
For me, the biggest reason to use them is simple: they make my blinds work better. Instead of dealing with annoying light leaks every day, I get better darkness, better privacy, and a more peaceful space.
My Buying Guides on Light Blocking Strips For Blinds
When I started looking for light blocking strips for blinds, I realized they can make a big difference in how well a room stays dark, private, and comfortable. I’ve learned that the right strips do more than just block sunlight—they also help reduce glare, improve sleep quality, and give a cleaner finished look around the window. Here’s my guide based on what I pay attention to when choosing them.
1. Check the Material
The first thing I look at is the material. I prefer strips made from durable, flexible materials like silicone, rubber, or high-quality foam because they can press against the window frame and block light effectively. If the material feels too stiff or too thin, I usually expect gaps or early wear.
2. Measure the Window Area Carefully
Before buying, I always measure the exact area where the light is leaking. Even a small mistake can leave gaps that let light through. I check the width, height, and the depth of the blind edges so I know the strips will fit properly and cover the problem spots.
3. Look for Easy Installation
I prefer light blocking strips that are simple to install without special tools. Adhesive-backed strips are usually my first choice because they save time and create a neat fit. I also make sure the adhesive is strong enough to stay in place but not so aggressive that it damages the frame when removed.
4. Choose the Right Color
Color matters more than I expected. I usually choose black or dark-colored strips when I want maximum light blocking, especially for bedrooms or media rooms. If I want something more discreet, I look for colors that blend with my blinds or window trim.
5. Consider Room Purpose
I think about where I’m using them. For a bedroom, I want the strongest possible light control. For a nursery, I care about comfort and sleep. In a living room or office, I may focus more on reducing glare while still keeping the room bright enough during the day.
6. Check Durability and Temperature Resistance
I always look for strips that can handle heat, cold, and regular use. Windows can get hot in direct sunlight, and some cheaper materials can warp, peel, or lose stickiness over time. A durable strip saves me from replacing it too soon.
7. Make Sure They Match Your Blind Type
Not every strip works well with every blind. I check whether my blinds are roller blinds, vertical blinds, Venetian blinds, or blackout blinds, because each style can have different light gaps. The best strip for me is one that fits the blind design and seals the edges properly.
8. Read Reviews for Real Light-Blocking Performance
I always read customer reviews before I buy. Product descriptions can sound perfect, but reviews tell me whether the strips actually block light, stick well, and last over time. I pay extra attention to comments from people using them in bedrooms or home theaters, since they usually care about darkness the most.
9. Think About Appearance
Since the strips may be visible, I look for ones that don’t make the window look bulky or messy. I prefer a clean, low-profile design that blends in nicely. If the room has a modern style, I want the strips to look neat and intentional, not like an obvious add-on.
10. Compare Value, Not Just Price
I’ve found that the cheapest option is not always the best value. I compare how much coverage I get, how long the strips are expected to last, and whether I’ll need extra tools or replacements. Spending a little more upfront usually makes sense if the strips perform better and last longer.
My Final Thoughts
For me, the best light blocking strips for blinds are the ones that fit well, stick securely, and actually stop light from leaking around the edges. I always focus on material, size, ease of installation, and durability before making a purchase. When I choose carefully, I get a darker room, better privacy, and a more comfortable space overall.
Final Thoughts
I’ve found that light blocking strips for blinds are a simple but effective way to reduce unwanted light and improve privacy in any room. My key takeaway is that they can make a noticeable difference in comfort, especially for bedrooms, nurseries, and home offices. I also like that they’re an easy upgrade without the need for a full blind replacement. Overall, they’re a practical solution if I want a darker, more polished window treatment.
Author Profile
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Ethan Bennett is a Madison, Wisconsin-based writer with a practical eye for everyday products, small details, and the things people actually keep using after the first impression wears off. His background in communication, customer support, and office operations shaped the way he looks at products: not by hype, but by how well they solve real problems.
Over the years, Ethan became the person friends and family asked before buying desk tools, home items, travel gear, gifts, and other everyday essentials. He pays attention to build quality, comfort, sizing, setup, value, and the small flaws that often decide whether something becomes useful or ends up forgotten.
Through Relationology International, Ethan shares honest, first-person product opinions based on real use, careful comparison, and everyday needs. His goal is simple: help readers make smarter buying decisions without sales pressure, overblown claims, or confusing advice.
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