When seeking true darkness for bedrooms, nurseries, or media rooms, side runners or light blocking strips are essential. These L-shaped PVC blockers sit along the edges of blinds, shades, or roller coverings to seal gaps and prevent side leakage. The following selections focus on reliable, install-easy options that help convert standard window treatments into near-total blackout solutions. Each entry is chosen for compatibility with common blinds and shades and for straightforward DIY installation.
Product Summary
| Product | Brand | Length | Material | Key Benefit |
|---|---|---|---|---|
| ZSTARR PVC Light Blockers (2Pcs) | ZSTARR | 58" | PVC | Reduces side light leakage |
| WINSMAR Light Blocking Strips (2Pcs) | WINSMAR | 58.5" | PVC | Easy trim, fits varied shades |
| Bliwans Light Blocking Strips (2Pcs) | Bliwans | 58" | PVC | Durable, reduces side leakage |
| Keego Light Blockers (2Pcs) | Keego | 58.5" | PVC | 100% light control along sides |
| Sleepy Time Tracks Light Blocking Strips (2Pcs) | Sleepy Time Tracks | 72" | PVC with foam gasket | Gap-sealing gasket for tight fit |
ZSTARR PVC Light Blockers Side Tracks
ZSTARR light blockers are designed to seal the vertical edges of window coverings. These L-shaped PVC strips attach along the inside edge of the window frame to minimize side gaps that let in light. The package includes two 58-inch blocks that can be trimmed for a custom fit. They’re intended to work with standard blackout shades to maximize room darkening and privacy without replacing existing shades.
ZSTARR White Side Tracks (Duplicate Style)
Similar to the other ZSTARR option, this white 58-inch pair emphasizes ease of installation and a snug fit to reduce side light from entering around shades. The blocks are designed to be applied directly to the inside edge of the window frame, offering a simple peel-and-stick installation. The goal is to reinforce blackout performance by closing side gaps without altering the core shade design.
WINSMAR Light Blocking Strips (58.5")
WINSMAR’s PVC light blocking strips come in a trim-friendly length. They’re designed to seal the sides of blinds and shades, preventing light from leaking in at the edges. The product notes emphasize the ability to cut to size using appropriate tools, with a standard size around 58.5 inches by 1.6 inches by 0.9 inches. Installing close to the shade edge is advised for maximum effect.
Bliwans Light Blocking Strips (58")
Bliwans’ light blocking strips focus on reducing side light intrusion around a wide range of window coverings. The PVC strips are designed to be trimmed to fit 58-inch lengths and help create a darker room by sealing light leaks along the sides of blinds and shades. They are compatible with various types of window treatments, including cellular shades and roller shades, when installed along the side tracks.
Keego Light Blockers For Side Gaps
Keego’s 58.5-inch light blockers are designed to seal the sides of blackout window blinds. The packaging notes trimming with standard tools and the ability to block light along the sides effectively. These blocks are positioned either in front of or behind the shade to block the portion of the window that is not covered, improving overall darkness in a room.
Sleepy Time Tracks Light Blocking Strips (72")
Sleepy Time Tracks offers longer, 72-inch light blocking strips designed for deeper coverage along blinds. Their solution includes a built-in foam gasket to seal gaps and reduce side leakage, as well as a strong adhesive for secure mounting. The strips are designed to be cut to fit and are suitable for bedrooms, nurseries, and media rooms that require a tighter blackout seal.
Buying Guide: Key Considerations For Side Runner Blockers
- Fit and compatibility: Ensure the strips match your window treatment type (cellular, roller, or blackout blinds) and fit the window width. Most products list adjustable lengths and trimming guidance.
- Material and durability: Most options use PVC for flexibility and light absorption. Look for durable construction and reliable adhesive to avoid sagging or detachment over time.
- Installation method: Peel-and-stick is common, but some require screws or simple cutting. Consider your tolerance for tools and potential wall impact during removal.
- Light sealing performance: The main goal is to block side light leaks. Effectiveness varies by design—L-shaped blockers that fit close to the shade edges tend to perform best.
- Reusability and adjustment: Some models are designed for removal and repositioning, while others are more permanent. If you expect changes in window treatments, consider reusable options.
- Color and aesthetics: White or black options help blend with most blinds. Choose a finish that complements your room’s decor without drawing attention.
- Safety and maintenance: Check for materials that are easy to clean and do not degrade with heat or humidity. Adhesive strength matters for long-term performance.
- Installation video and support: Some brands provide installation videos or guides; these can help ensure correct alignment and optimal coverage.
How To Choose The Right Side Blocker For Your Windows
Consider the typical light environment in your room: a bright morning or a late afternoon glare often requires the strongest side-sealing approach. If your blinds are thinner or older, opting for a longer, more universal blocker (like the Sleepy Time Tracks 72") can offer a more pronounced seal. If you frequently adjust shades, a reversible or easily removable option may be preferable. Always measure your window width accurately and trim blockers to match the exact size for best results.
Installation Tips For Best Results
- Clean sash surfaces before applying blockers to ensure maximum adhesion.
- Apply blockers as close to the shade edge as possible for the tightest seal.
- Trim gradually and test fit after each cut to maintain proper alignment.
- For extensions, consider combining blockers to achieve full-frame coverage on larger windows.
- Refer to product-specific installation videos for proper alignment and positioning guidance.