For bedrooms, nurseries, and media rooms, light control is essential for privacy and restful sleep. The following light blocking strips are designed to seal side gaps along blinds and shades, reducing light leakage and improving blackout performance. Below is a curated set of five reliable options with varying installation details, cut sizes, and compatibility to suit different window coverings.
| Product | Brand | Length | Material | Notes |
|---|---|---|---|---|
| Bliwans Light Blocking Strips | Bliwans | 58″ | PVC | Blackout side tracks, easy trim |
| LazBlinds Light Blockers | LazBlinds | 58″ | PVC | Adhesive-backed, cuttable |
| WINSMAR Light Blocking Strips | WINSMAR | 58.5″ | PVC | Cut at home, dual-side |
| Keego Light Blocking Strips | Keego | 58.5″ | PVC | Cuts at home, durable |
| Blindify Light Blocking Strips | Blindify | 58″ | PVC | 95% light reduction, trim to fit |
Bliwans Light Blocking Strips for Windows
The Bliwans strips are designed to seal side gaps along blinds and curtains, delivering blackout performance for bedrooms, home theaters, and nurseries. Made from light-absorbing PVC, these L-shaped blocks fit along the sides of various window coverings to reduce light leakage and enhance privacy. They are supplied as 58″ strips that can be trimmed to fit different window sizes, enabling a custom fit without specialized tools. Ideal for users seeking a straightforward, trim-to-fit solution.
LazBlinds Light Blockers for Blinds
These light blockers from LazBlinds are designed to sit along the window edge to seal gaps between blinds and frames. They are easy to install with a 3M adhesive backing and come in a cuttable 58″ length. The product emphasizes quick, tool-free setup and provides instructions with an installation video for accuracy. They are suitable for a range of window sizes and can be trimmed to fit precisely, helping reduce side light leakage.
WINSMAR 100% Blackout PVC Light Blockers
WINSMAR offers L-shaped PVC light blockers that cover both sides of window shades. The strips come in a standard 58.5″ length and can be cut to fit at home. They are marketed as effective at blocking light leaks along the edges of blackout shades, making them suitable for bedrooms and nurseries where a dark environment is essential for sleep or focus. The material is designed to absorb light and reduce glare from side entries.
Keego 100% Blackout Light Blocking Strips
Keego light blockers are designed to seal the sides of blackout blinds. They come in a 58.5″ length and can be trimmed to fit window sizes. The product highlights a simple home-cut process and emphasizes the need to have the window treatment slightly smaller than the opening to prevent light leaks when the shade is adjusted. The PVC construction provides durable, long-lasting light blocking performance.
Blindify Light Blocking Strips
Blindify offers 58″ light blocking strips designed to reduce side light leakage by up to 95%. The strips feature a black inside layer with a white exterior for aesthetics and compatibility with existing decor. They are trim-to-fit with scissors or a hacksaw, making them a practical option for standard-sized windows. The emphasis is on achieving a true blackout effect while maintaining a clean look on window edges.
Sleepy Time Tracks Window Light Blocker
Sleepy Time Tracks provides removable, magnetic light blocking strips with a foam gasket for a true blackout seal. Designed for cellular and roller shades, these strips are easy to pop on and off for cleaning or window maintenance. They offer a range of lengths, including 60″ and beyond, and are particularly useful for tilt-in windows or spaces where screens need occasional removal without damage. The foam gasket helps seal uneven gaps.
Buying Guide: Key Purchase Considerations
- Window type compatibility: Ensure the strips fit your blinds, shades, or curtains (cellular, roller, or Roman).
- Length and trim options: Look for standard lengths (around 58″–58.5″) with easy trimming to fit your exact window width.
- Installation method: Adhesive-backed vs. magnetic; consider the ease of removal for cleaning and reapplication.
- Material performance: PVC-based strips provide light absorption, but check for durability and edge wear resistance in high-traffic areas.
- Light leakage coverage: Evaluate whether a dual-side (both sides of the window) design or a single-side blocker best fits your blackout goals.
- Aesthetic fit: Some models offer a white exterior or black interior to blend with decor while maximizing darkness.
- Maintenance and repositioning: Removability matters for tilt-in windows and frequent cleaning to avoid damage to walls or frames.
When choosing among these options, consider the balance between ease of installation, completeness of blackout, and how well the strips blend with your window treatment. For best results, measure window dimensions carefully, trim strips as needed, and align them closely to the blinds or shades to minimize light leakage along the sides.