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ZSTARR

ZSTARR PVC Light Gap Blockers for Window Shades White 79" 4pcs

  • Based on 377 reviews
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Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon
Arrives Nov 6 – Dec 3
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Color: L-shaped White-4pcs


Size: 79‘’


Features

  • Plastic
  • 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.
  • Reduce light leakageZSTARR L-shaped PVC blackout light blockers are installed along the sides of window blinds and shades to reduce light leakage caused by side gaps. By blocking light from the edges of blackout blinds and shades, they help create a darker environment that supports better privacy and quality sleep. Designed to reduce side light gaps, not to replace blackout shades.
  • Easy To InstallNo tools required. Simple peel-and-stick adhesive installation. Simply peel off the adhesive backing and stick the light blockers to the side of your inside window frame. Stop the light from coming in through the sides. The light blockers can be combined or trimmed with standard household scissors for a custom fit. Size: 79 x 1.6 x 0.9 inches (4 PCS). For maximum coverage, install as close to the blackout shades as possible. Please refer to our installation video for proper installation and alignment.
  • 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. Works with cellular shades, honeycomb blinds, roller shades, roman shades, and more. Recommended for inside-mount blinds with flat window frames and at least 1 inch window depth for best performance. If the light blockers are not suitable for your windows, they can be returned within 30 days for a refund.

Description

Does this help block light leaking from the sides? Yes. It is designed to reduce side light gaps when installed tightly along the window frame. What windows does it work for? Best for inside-mounted windows with a flat frame and at least 1 inch depth. Can it be cut to fit my window? Yes. It can be trimmed with scissors for a custom fit. Will the adhesive damage my window frame? No. The adhesive is strong but removable when applied correctly. When installed correctly, the adhesive is strong yet removable. Surface damage may occur if removed after full adhesion. Is installation complicated? No tools required. Start with a small section, align first, then press fully. L-shaped Light Blockers U-shaped Light Blockers PVC Flexible Track Aluminum Flexible Track Motorized Track Motorized Roller Shades

Material: Polyvinyl Chloride (PVC)


Brand: ZSTARR


Color: L-shaped White-4pcs


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


Item Weight: 2.72 kg


Size: 79‘’


Number Of Panels: 4


Material Type: Polyvinyl Chloride (PVC)


Product Care Instructions: Spot Clean Only


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: KH-SYID-4RQ2


Manufacturer: ZSTARR


Color: L-shaped White-4pcs


Shape: Rectangular


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 6 – Dec 3

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.

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Top Amazon Reviews

    • A little expense for what they are, but they do work and are made well
Color: U-shaped Custom Size: 44''-115''
Review Image by 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
    • Customizable and paint adhered to match walls
Color: L-shaped White-2pcs Size: 58‘’
Review Image by LP
We were surprised that it worked so well due to Nv heat! We painted it to match.
Reviewed in the United States on September 21, 2026 by LP
    • Helps block extra light
Color: L-shaped White-4pcs Size: 79‘’
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
    • Great product
Color: U-shaped Custom Size: 44''-115''
These are Great. I've always wanted blackout shades and these coupled with good blackout shades are perfect. I can't see my hand in front of my face because it's so dark. The quality is top notch, they will last much longer than me or the house. Very easy to install even for me. I ended up doing all my windows. My brother saw them and he's doing his house now. ... show more
Reviewed in the United States on April 11, 2026 by Trina G
    • Adhesive way to strong - damaged my wall and the product snapped
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. ... show more
Reviewed in the United States on October 26, 2024 by Clay V
    • Great product, but poor packaging
Color: L-shaped White-2pcs Size: 79‘’
Review Image by Jeff C
Review Image by 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
    • Light blocking
Color: L-shaped Black-2pcs Size: 58‘’
Worked as expected
Reviewed in the United States on August 7, 2026 by Ron Surgeoner
    • Perfect for my requirement
Color: L-shaped Grey-2pcs Size: 58‘’
Review Image by Naresh
Review Image by Naresh
Review Image by Naresh
Very good quality and it suited very well with my window blinds and looks very good. And did not use any tools to install just peel and stick. Highly recommend this product.
Reviewed in the United States on April 26, 2026 by Naresh

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