ZSTARR Custom Aluminium Alloy Light Blockers U-Channel Blackout Light Blockers Side Tracks for Window Shades and Blinds Side Tracks for Blackout Shades Light Blocking Strips for Bedroom 2Pcs
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Availability:
20 left in stock
Arrives
Jun 12 – Jun 21
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Color: U-shaped Custom
Size: 44''-115''
Features
- Aluminium Alloy
- Why we need to install light blockers for shadesMost blinds and blackout shades are made slightly narrower than the window frame to allow smooth raising and lowering. This design often causes light leakage from the sides. If your blackout blinds or shades still let in unwanted side light, this common side gap issue can reduce room darkening. ZSTARR light blocking strips are designed to help solve this problem and improve overall room darkening performance.
- Latest U-shaped Aluminum Alloy Light BlockersZSTARR light blocking strips are made of thickened aluminum alloy tracks for long-lasting durability. The U-shaped design allows the blockers to be installed along the sides of window shades and blinds, providing more stable coverage. By fitting closely against the edges of your blackout blinds and shades, these light blockers help reduce light leakage through the sides. They create a darker indoor environment, helping improve privacy and support better sleep quality. Designed to reduce side light gaps, not to replace blackout shades.
- Custom Light BlockersOptional length sizes: 44115 inches (2 PCS). Please select the appropriate size after measuring the installation height under the mounting bracket of your roller blinds. No cutting required. Simply fasten the light blockers onto the window frame with screws for a secure fit. After removal, the light blockers can be reused by reinstalling the screws. For best performance, install the light blockers as close to the blackout shades as possible to reduce side light gaps.
- U-shaped Light-blocking Side TracksThese blackout side tracks are ideal for night-shift workers, light-sensitive sleepers, or anyone creating a darker room during the day for sleep, movies, or gaming. Applicable to roller shades and blinds, zebra shades, and other blinds and shades. Not suitable for cellular shades or honeycomb blinds. Recommended for inside-mount blinds with flat window frames and sufficient depth ( 1 in). Designed for blinds with a slim bottom rail (recommended width 0.5 in) and to reduce common side light gaps ranging from 0.21.5 in, allowing closer edge coverage and improved room darkening.
Material: Aluminum
Brand: ZSTARR
Color: U-shaped Custom
Opacity: 1 inches
Recommended Uses For Product: Indoor
Opacity: 1 inches
Operation Mode: Manual
Additional Features: Light blocking
Mounting Type: Inside Mount
Water Resistance Level: Not Water Resistant
Control Type: Manual
Number of Items: 1
Size: 44''-115''
Number Of Panels: 2
Color: U-shaped Custom
Shape: Rectangular
Pattern: Solid
Text: 2 text inputs
Brand Name: ZSTARR
Recommended Uses For Product: Indoor
Specific Uses For Product: Home Décor, Nursery/Baby
Room Type: Bathroom, Bedroom, Home Office, Kids Room, Media Room
Included Components: User Manual
Model Number: U40-custom
Manufacturer: ZSTARR
Unit Count: 2.0 Count
Material Type: Aluminum
Product Care Instructions: Spot Clean Only
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jun 12 – Jun 21
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- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Color: U-shaped Custom
Size: 44''-115''
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
Color: L-shaped White-2pcs
Size: 58‘’
Exactly what was advertised, easy enough to cut, and worked perfectly for my application which was to reduce light leaking above the curtains!
Reviewed in the United States on January 12, 2026 by LdRockingham
Color: U-shaped Custom
Size: 44''-115''
I have roller blinds that let in a ton of light through as a result of direct sunlight on the window. This was able to get rid of a large amount of it, but it did let through a significant amount. However, with some modifications of my own, I got it working perfectly, and I dare say not a single photon makes it around the inside of the track. 1. Make the inside of the track black somehow, like with spray-paint. With all three sides on the inside black, that absorbs like instead of reflect it like the bare aluminum does. This alone reduces the amount of light leaking through by like 80%. 2. Use larger brush strips. At least for me, the brushes didn't really block much light that was reflected around. Fortunately they can just be removed and replaced. So I bought some rolls of brush weatherstripping myself - You will need some that has a width of 5mm width or 3/16 inches. The brush length required will depend on your situation, but I actually found a combination of two lengths worked best. For the "inside-side" I used half-inch length brushes (so 5mm x 12mm brush weatherstripping), and on the "outside-side" I used 5mm x 8mm. This is because I found with just the 8mm width ones, it still let some light through, and the 12mm ones would have prevented the bottom bar thing from moving. But this combination allowed movement of the roller blinds and still seems to go right up to the blind, therefore blocking any rest of the light. You can try other combinations of brush length though. Otherwise, it was convenient that they cut the tracks to size and also drilled the holes, and they shipped it faster than expected. So to sum up, the main improvement I think they should do is paint the inside of the track black. I also think the brushes should be a bit longer by default, but that's not as big a deal because you can just buy replacements.
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Reviewed in the United States on October 20, 2023 by Joe Thio
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
Easy install for total blackout. Complete game changer. Definitely buy this
Reviewed in the United States on February 16, 2026 by Puja
Color: L-shaped Black-2pcs
Size: 58‘’
I was setting this up in my kids room on two windows. I managed to do the first window without any issues, but I misaligned the second window and some light was creeping through. I thought oh no problem, I see where I misaligned the initial placement. Wanted to redo my placement and I cannot remove these from my wall! I removed one side of the blockers with minimal issues, but this other side ended up damaging my wall. The adhesive was so strong the blocker ended up snapping as I was trying to remove it. I'm now stuck with half of this light blocker in my kid's window frame and I have no idea how to remove it. At this point, I just need to remove it with minimal damage to my window frame. If you can do this on your first try, you're golden and works like a charm. Slight misalignment and need to redo the placement? Expect a headache.
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Reviewed in the United States on October 26, 2024 by Clay V
Color: U-shaped White-2pcs
Size: 58‘’
Work perfectly to block out the light on the sides
Reviewed in the United States on April 10, 2026 by Roger Mcafee
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