ZSTARR U Channel Aluminium Alloy Light Blocking Strips for Roller Blinds Light Gap Blockers Window Shades Side Rail Tracks Bedroom Sleep Nursery (White,79",2Pcs)
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FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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Availability:
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Color: U-shaped White-2pcs
Size: 79‘’
Features
- Why we need to install light blockers for shadesMost blinds and shades are smaller in width than the window to avoid the fabric rubbing against the wall when the blackout shade is raised or lowered. If your blinds or shades are always leaking some annoying light, then we suggest you install ZSTARR light blocking strips.
- Latest U-shaped Aluminium Alloy Light BlockersZSTARR light blocking strips are made of thickened aluminum alloy track and would last. It is designed in a U-shap and installed along sides of the window shades and blinds. Achieve stop the light from coming in through the sides of your blackout blinds & shades. Create a dark environment for you and helps protect your privacy and quality sleep.
- Easy To InstallSize: 58 x 1.6 x 0.99 inches (2PCS). Accessories: side cover (2pcs), Installation instructions and screws. You can cut the light blockers by the cutting machine to suit your need size that perfectly fit your roller shades. All you need to do is fasten the light blockers on the window frame with screws,also the side light blockers can be used repeatedly after removing the screws. It should be placed as close to the Blackout window shades as possible for maximum coverage.
- U-shaped Light-blocking Side TracksThe blackout side tracks for blinds perfect for those who work at night and sleep during the day. Also, this blackout window inserts can provide you a dark environment when you want to watch a movie at home during the day one day. Apply to roller shades and blinds, zebra shades and more(Cellular shades, honeycomb blinds not applicable). Recommended for inside mount blinds.
- After-sales ServiceWe provide high-quality product and service for every customer, If accessories or products are missing or broken, please message us and we will resend the accessories or products. If you are not sure if your window type is suitable, please check with customer service before ordering. (Attention please the thickness of the lower rod should be less than 0.5in and the leakage of light should be less than 1.5in,otherwise the light blocker strip won't fit your roller shades)
Material: Aluminum
Product Dimensions: 79"L x 1.6"W
Brand: ZSTARR
Color: U-shaped White-2pcs
Opacity: Blackout Inches
Material: Aluminum
Product Dimensions: 79"L x 1.6"W
Brand: ZSTARR
Color: U-shaped White-2pcs
Opacity: Blackout Inches
Recommended Uses For Product: Indoor
Room Type: Bathroom, Bedroom, Home Office, Kids Room, Media Room
Operation Mode: Manual
Special Feature: Light blocking
Included Components: User Manual
Shape: Rectangular
Number of Items: 2
Pattern: Solid
Item Weight: 5.31 Kilograms
Product Care Instructions: Spot Clean Only
Size: 79‘’
Mounting Type: Inside Mount
Number Of Panels: 2
Water Resistance Level: Not Water Resistant
Control Type: Manual
Manufacturer: ZSTARR
Item Weight: 11.68 pounds
Item model number: U40 -White-79in-2pcs
Batteries required: No
Frequently asked questions
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Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: U-shaped White-2pcs
Size: 58‘’
The media could not be loaded. Great at blocking light! It’s completely metal and seems to be constructed really well. Fits my windows well and I’ve had no issues with my automatic shades. Installation was relatively easy. However, you’ll need a saw and a drill bit designed for metal. After cutting them to my desired length the end caps were a bit different to attach. Definitely worth the investment.
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Reviewed in the United States on July 28, 2025 by B B
Color: U-shaped Custom
Size: 1.6"W x 115"H
I have a Yoolax roller shade in my bedroom that is surface mounted on a window. Quite a bit of light gets past the edges when closed, so I bought these to help cut down on the light leakage. These are very sturdy and have a soft fabric "brush" on the inside edges to protect the edge of the window shade. I had to shorten these channels to fit my windows, I just used my table saw with a fine tooth blade to cut through the aluminum channel. The plastic cover on both ends is removable, just make sure to clean out the channel as there are some grooves that the end piece needs to fit in to lock it in. I used a thin run of double sided tape to adhere these to the outside trim of the window. The weighted bottom of the Yoolax shade fits nicely in the channel and the shade still opens and closes without binding. Looks nice and the color is very close to the metal valance of my roller shade.
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Reviewed in the United States on March 17, 2024 by E Reed E Reed
Color: L-shaped White-2pcs
Size: 1.6"W x 58"H
Works perfectly in our newborn's room. Very heavy duty!
Reviewed in the United States on October 14, 2025 by Patrick Atchison
Color: L-shaped White-4pcs
Size: 1.6"W x 79"H
I got these to put around some roller shades I had installed as they were inside the frame and did not go edge to edge. They certainly work but aren’t perfect. Installation was mediocre. I had to cut these down with a small hand saw and the edge was very rough. I put that at the top behind the valence but probably should have sanded it for safety. The peel off paper on the adhesive was also a pain to remove. It ripped several times when I was peeling so I needed a small razor to find the edge again. The adhesive itself is very sticky. So much so that when I tried to quickly remove it after touching it to the wall to align it better, it took off some of the paint. I don’t think there’s any risk of it falling off, but will update this review if it ever does. I don’t use the hardware or the included as the adhesive felt plenty strong. Similarly, I haven’t added the included blackout tape to line the inside yet. I’m sure that will help a bit. As it stands though, this certainly does help block out some of the light but you’ll really need to use guides to push a shade flush against the inside track if you want it to block everything. It looks pretty good now that it’s installed and I could probably paint over it if I wanted to match the wall color in the future. The value is also pretty good relative to other options. Size is fine now that I cut it down. Overall it’s a good option, though I’d prefer to see easier adhesive tape removal and some kind of included guide to keep it level when installing. Feels easy enough to include a plastic piece that can clip on to each end that can keep the piece square to the edge of the frame when you’re installing.
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Reviewed in the United States on June 2, 2024 by D4st
Color: L-shaped White-2pcs
Size: 1.6"W x 79"H
I followed the instructions and was very excited. However, once installed it did not block light from entering the room.
Reviewed in the United States on September 15, 2025 by Ronald
Color: L-shaped Custom
Size: 44''-115''
I was a little reluctant to buy it because I know they aren’t returnable. I measured with my tape measure, confirmed the measurements when they messaged me after purchase and I received them in a very hard cardboard tube so the pieces were not damaged or bent at all. After ordering two sets and seeing how great they were and worked, I ordered two additional sets, and it was very happy with the quality and with the consistency! The measurements were perfectly spot on. I don’t think the black tape is necessary for anything. I think it’s supposed to absorb light, but it doesn’t do anything so I left that off. The tape that comes on the pieces with the adhesive is very strong and super easy to stick up!
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Reviewed in the United States on June 11, 2024 by Lelo84
Color: L-shaped White-2pcs
Size: 1.6"W x 58"H
Really easy to install and to cut to size. They fit snugly and do what they’re supposed to do. The room is much darker now
Reviewed in the United States on July 17, 2025 by Diana Stone
Color: L-shaped White-2pcs
Size: 1.6"W x 79"H
Great product, but the packaging was inadequate. These blackout PVC light blockers are heavy duty and do their job very well, IF they are straight. The ones I received were mailed in a long three-sided cardboard box which did nothing to protect the product. The light blockers are 79" long, which, as you can image, had a high probability of getting bent (they were, see photos). A more rational packaging would have the product taped to a wooden pole (or something similar) to prevent bending during transport. Rather than request a return, I straightened the blockers the best I could using hand weights and a strong vise, which eliminated 75% of the bend. I had to use screws to mount to the doorway, however, since the adhesive wasn't strong enough to overcome the remaining bend. It turned what would have been a simple installation into something more complicated and time consuming. That said, these light blockers are very sturdy and do what they are intended to do. I added black felt to the sun-side of the L-shaped surface, which helped eliminate most of the reflected light creeping in between the edge of the shade and the door frame. I would buy again, assuming more care in how they are packaged.
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Reviewed in the United States on November 10, 2023 by Jeff C Jeff C