Search  for anything...
ZSTARR

ZSTARR Aluminum U Channel Light Gap Blockers for Shades White 79" 2Pcs

  • Based on 377 reviews
Condition: New
Checking for the best price...
$99.99 Why this price?

Buy Now, Pay Later

As low as $16.67 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Nov 1
Order within 18 hours and 48 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Color: U-shaped White-2pcs


Size: 79‘’


Features

  • 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.
  • Easy To InstallSimply fasten the light blockers onto the window frame with screws for a secure fit. After removal, the side light blockers can be reused by reinstalling the screws. The light blockers can be combined or cut to length using a cutting machine for a custom fit. Size: 79 1.6 0.99 inches (2 PCS). Accessories include side covers (4 PCS), installation instructions, and screws. For maximum coverage, install as close to the blackout shades as possible. Please refer to our installation video for proper installation and alignment.
  • 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.

Description

Why do blackout blinds still leak light from the sides? Most blinds are made slightly narrower than the window frame, which creates side gaps and allows light to enter. What side gap size are these light blockers designed for? Designed to reduce common side light gaps of 0.2–1.5 in along blackout blinds and shades. What blinds are compatible with these U-shaped side tracks? Works with roller shades, zebra shades, and similar blinds. Not suitable for cellular or honeycomb shades. What measurements should be checked before ordering? Inside-mount window depth ≥ 1 in. Recommended bottom rail width ≤ 0.5 inch Do these light blockers replace blackout shades? No. They are designed to reduce side light gaps and improve edge coverage when used with blackout shades. U-shape Light Blockers L-shape Light Blockers PVC Flexible Track Aluminum Flexible Track Motorized Track Motorized Roller Shades

Material: Aluminum


Brand: ZSTARR


Color: U-shaped White-2pcs


Opacity: Blackout inches


Recommended Uses For Product: Indoor


Opacity: Blackout inches


Operation Mode: Manual


Additional Features: Advanced Light Blocking


Mounting Type: Inside Mount


Water Resistance Level: Not Water Resistant


Control Type: Manual


Number of Items: 2


Item Weight: 1.3 kg


Size: 79‘’


Number Of Panels: 2


Material Type: Aluminum


Product Care Instructions: Spot Clean Only


Brand Name: ZSTARR


Recommended Uses For Product: Indoor


Specific Uses For Product: Blackout shades for bedrooms, nurseries, media rooms


Room Type: Bathroom, Bedroom, Home Office, Kids Room, Media Room


Included Components: User Manual


Model Number: U40 -White-79in-2pcs


Unit Count: 2 Count


Manufacturer: ZSTARR


Color: U-shaped White-2pcs


Shape: Rectangular


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Nov 1

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great for black out shades.
Color: U-shaped White-2pcs Size: 58‘’
Review Image by B B
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. ... show more
Reviewed in the United States on July 28, 2025 by B B
    • A little expense for what they are, but they do work and are made well
Color: U-shaped Custom Size: 1.6"W x 115"H
Review Image by E Reed E Reed
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. ... show more
Reviewed in the United States on March 17, 2024 by E Reed E Reed
    • Perfect
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
    • Helps block extra light
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. ... show more
Reviewed in the United States on June 2, 2024 by D4st
    • Does not block light
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
    • Great quality, and works!
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! ... show more
Reviewed in the United States on June 11, 2024 by Lelo84
    • Easy install
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
    • Great product, but poor packaging
Color: L-shaped White-2pcs Size: 1.6"W x 79"H
Review Image by Jeff C Jeff C
Review Image by Jeff C Jeff C
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. ... show more
Reviewed in the United States on November 10, 2023 by Jeff C Jeff C

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...