Best Side Channels for Roller Shades to Block Light and Improve Privacy
Side channels for roller shades are a simple, effective solution to eliminate side-light leaks and enhance room darkening. By sealing the edges where fabric meets the window frame, these tracks help create a more uniform blackout effect, making bedrooms, home theaters, nurseries, and living spaces more comfortable. This article compares top-rated options available on Amazon, highlighting installation, materials, and suitability for various shade types. Use the buying guide at the end to choose the right configuration for your windows and personal preferences.
| Product | Material | Design | Approx. Coverage | Notes |
|---|---|---|---|---|
| Light Blocking Strips for Window Shades and Blinds | PVC | L-shaped, dual-side | 58″ length pair | Blocks side light, reduces leakage |
| ZSTARR U Channel Light Blocking Strips | Aluminum alloy | U-shaped channel | 58″ length pair | Durable, stable coverage |
| U-Channel Aluminium Alloy Light Blocking Strips | Aluminum alloy | U-shaped | 58.5″ length pair | Reusable, trim-to-fit |
| 100% Light Blocking Strips Blackout L-Shaped PVC | PVC | L-shaped, dual-side | 58.5″ length pair | Standard size, easy cut |
| 100% Blackout PVC Light Blocking Strip for Window Shades | PVC | L-shaped | 58.5″ length pair | Compatible with multiple shade types |
Light Blocking Strips For Window Shades And Blinds

The Light Blocking Strips from Bliwans Store are designed to fit a range of window coverings, including cellular shades, honeycomb blinds, roller shades, and Roman shades. The PVC material is described as light-absorbing, aiding in reducing light leakage from the sides of blackout curtains or sunshades. These side tracks come in a 58″ length and are sold as a two-pack, offering a straightforward retrofit for most standard window widths. Installation involves affixing the L-shaped blocks along the window frame to create a tighter seal against incoming light. Ideal for bedrooms requiring deeper darkness or spaces where privacy is essential.
Key advantages include a relatively simple installation process and compatibility with several common shade types. Potential drawbacks could include fitment precision for windows that are not perfectly square or for ultra-wide shades, where additional tailoring might be necessary. As with other PVC options, users should consider heat exposure and cleaning needs, since PVC can accumulate dust over time. Still, for many homes, these light-blocking strips provide a cost-effective, non-invasive upgrade to improve light control and privacy.
ZSTARR U Channel Aluminium Alloy Light Blocking Strips

ZSTARR offers a robust approach to side-light blocking with U-shaped aluminum tracks designed to align closely with the edges of window shades. The aluminum alloy construction emphasizes durability and long-term performance, aiming to reduce light leakage from the sides without compromising the ability to raise or lower blinds. The set includes two 58″ strips, side covers, installation instructions, and screws for a secure fit. A cutting option allows customization for non-standard window widths, making this option adaptable for various room sizes and shade configurations.
Installation is described as simple: mount the tracks along the window frame with screws, then align them to maximize coverage. The U-shaped design helps cradle the shade edge, improving airflow and heat resistance while maintaining a clean look. This product is particularly appealing for households seeking a stable, long-lasting solution that can be reused if you relocate or remodel. Durability and precision fit are cited as primary benefits, with the expectation of noticeable reduction in side light leakage and improved privacy in bedrooms or media rooms.
U-Channel Aluminium Alloy Light Blocking Strips

DRSART’s U-Channel light blocking strips emphasize easy installation and reuse. With a 58.5″ length and a 1.6″ width, these strips are designed to be trimmed to fit roller shades and other window coverings. The product emphasizes a reusable design, allowing removal and repositioning if you move or reconfigure interior spaces. The strips are advertised as suitable for multiple room types—from bedrooms to kitchens—highlighting their versatility beyond traditional bedrooms and nurseries. The installation method involves screwing the channel to the window frame and using a cutting machine to tailor the length for a precise fit.
End-user considerations include whether aluminum tracks complement existing hardware, how often the strips might be removed, and the alignment needed to ensure maximum light blockage. While the aluminum construction offers strength and a modern look, it may be less forgiving than PVC in cases where window frames are not perfectly square. For households prioritizing durability and long-term performance, these U-channel strips provide a solid option to reduce side light leakage and improve privacy across a variety of spaces.
100% Light Blocking Strips Blackout L-Shaped PVC

This DRSART range focuses on a dual-side L-shaped PVC track designed to block light on both sides of a variety of window coverings. The standard length is 58.5 inches, with a width of 1.6 inches and a thickness of approximately 0.9 inches. The PVC material is described as light-absorbing, contributing to significant reductions in side light leaks when installed along the edges of blackout blinds or shades. The design is intended to improve privacy and room darkening, which can be especially beneficial for home theaters or bedrooms where darkness is critical for comfort and sleep quality.
Pros include a straightforward cut-to-fit approach and compatibility with multiple shade types. Users should assess whether the two-sided L-shape aligns with their window frame and mounting hardware. It is important to ensure proper alignment to achieve optimal darkness, as any misalignment could allow light to creep in. The strips are marketed as a practical, easy-to-install solution that can adapt to many spaces in a home or nursery, offering a simple upgrade to traditional blinds or shades.
100% Blackout PVC Light Blocking Strip for Window Shades

WINSMAR offers a versatile line of light-blocking strips designed to fit a range of window treatments and shade types. The standard size is 58.5″ by 1.6″ by 0.9″, and the strips are trimmed to fit using a hacksaw or similar tool. The PVC material is described as light-absorbing, with the intention of blocking light on the sides where shades meet window frames. The product emphasizes the practical steps needed to install and the cut-to-fit capability, making it accessible for DIY enthusiasts who want to tailor their window treatments precisely to their spaces.
From a performance perspective, these strips aim to reduce side light leakage and improve the overall darkness of a room. The option to cut at home provides customization flexibility for unusual window shapes or sizes. Potential considerations include ensuring you have the appropriate tools for cutting and confirming that the strips can be mounted securely with screws for a long-lasting fit. For those seeking a balanced blend of affordability and effectiveness, these strips offer a viable solution for bedrooms, nurseries, or media rooms.
Buying Guide: Key Considerations For Side Channels On Roller Shades
Material and durability: PVC tracks are often less expensive and corrosion-resistant, while aluminum alloys provide greater rigidity and a more premium look. Consider humidity, temperature, and cleaning needs when selecting a material for kitchens or bathrooms.
Fit and customization: Most options come in standard lengths (typically 58″ to 58.5″). Trim-to-fit capabilities matter for non-standard window widths. Ensure you have the right cutting tools and measurements before installation.
Installation method: Tracks are generally screwed to the window frame. Reusability is an important factor for renters or frequent movers. PVC options may be easier to install for DIY beginners, while aluminum tracks require precise alignment for best results.
Coverage and light control: The primary goal is reducing side light leakage. Evaluate how the track sits relative to the shade and whether it overlaps with the shade edges on both sides. A closer fit yields better darkness and privacy.
Compatibility: Check whether the strips are designed for specific shade types (roller, cellular, honeycomb) or universal across multiple styles. Some products include installation hardware and covers for a cleaner finish.
Maintenance: Dust can accumulate on tracks. PVC is generally easy to wipe down; aluminum tracks may require light polishing to maintain a smooth glide and appearance. Consider ease of cleaning in spaces like nurseries or kitchens.
In sum, selecting the right side channel or light-blocking strip depends on window width, shade type, desired darkness level, and whether you value durability over ease of installation. For rental homes or spaces where you may relocate, reusable or easily adjustable options can be especially advantageous. For new installations, choosing a matched system—aluminum for longevity or PVC for cost-efficiency—will help achieve reliable, long-term light control.