Light sneaking around the edges of an otherwise good blackout shade is the single most frustrating defeat in the pursuit of a truly dark room. Standard blinds and shades are deliberately cut narrower than the window frame to slide up and down freely, and that engineered gap is exactly where morning light pours through. Side tracks eliminate that precise weakness by creating a physical barrier along the vertical edges, turning a mediocre blackout setup into a near-total light seal.
I’m Mohammad Maruf — the founder and writer behind WellFizz. I’ve spent years analyzing window treatment hardware, from cellular shade cell sizes to the adhesive chemistry behind peel-and-stick seals, to identify what actually delivers measurable darkness.
This guide breaks down the materials, mounting methods, and seal mechanisms that separate effective side tracks from frustrating ones, so you can choose the best blackout blinds with side tracks for a genuinely dark bedroom, nursery, or media room.
How To Choose The Best Blackout Blinds With Side Tracks
Not all side tracks seal light the same way. Material rigidity, adhesive quality, and the presence of a gasket determine how much stray light gets through. Match the track design to your wall surface, shade type, and tolerance for installation effort.
Material: Rigid PVC vs. Foam-Lined Polystyrene
Rigid PVC strips offer a solid, long-lasting barrier that won’t compress over time, making them ideal for flat, smooth window frames. However, they leave tiny gaps on textured walls. Polystyrene strips with a built-in foam gasket conform to minor surface irregularities, sealing those micro-gaps that PVC misses. If your walls are bumpy or have old paint ridges, prioritize a gasket design over raw material hardness.
Attachment Method: Adhesive, Magnetic, or Screw-Mount
Permanent adhesive strips provide the strongest hold but risk peeling paint upon removal — a concern for renters. Magnetic side tracks pop on and off for cleaning or tilting windows, but the magnet strength must match the strip weight. Screw-mount options are the most secure on any surface, including textured walls, but require drilling. Choose adhesive for smooth, painted surfaces you own; magnetic for frequent window access; screws for rental-proof permanent installation on rough walls.
Length and Custom Fit
Most side tracks come in 58 to 72 inch lengths that must be trimmed. PVC cuts cleanly with a hacksaw or sharp scissors. Polystyrene with a foam gasket is trickier to cut cleanly — a utility knife or tin snips works best. For windows shorter than the stock length, cutting is straightforward. For windows taller than 72 inches, you will need to butt two strips together, which may create a small seam gap that requires a dab of matching paint or caulk to seal.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Sleepy Time Tracks 72″ Permanent | Side Track Strips | Total blackout on uneven walls | Foam gasket, 72″ length | Amazon |
| Sleepy Time Tracks 60″ Removable | Side Track Strips | Damage-free removal for renters | Removable magnetic, 60″ length | Amazon |
| WINSMAR Magnetic 58.5″ | Side Track Strips | Frequent window tilting and cleaning | Magnetic, black interior lining | Amazon |
| Boolegon Roller Shade | Roller Shade | All-in-one blackout with built-in baffle | Linen fabric, 38mm tube, cordless | Amazon |
| LazBlinds Cellular Shade | Cellular Shade | No-drill no-damage inside mount | Cordless, silver-plated blackout cell | Amazon |
| ZSTARR PVC Light Blockers | Side Track Strips | Budget-friendly PVC seal | Peel-and-stick PVC, 58″ | Amazon |
| Blindify PVC Light Blockers | Side Track Strips | Entry-level light reduction | Peel-and-stick PVC, 58″ | Amazon |
In‑Depth Reviews
1. Sleepy Time Tracks 72″ Permanent
The Sleepy Time Tracks 72″ Permanent set earns the top spot because of its patented foam gasket — a compressible strip that molds to minor wall irregularities where rigid PVC tracks inevitably leak light. This design directly addresses the most common failure point of side tracks: imperfect sealing on textured or aged wall surfaces. The polystyrene material itself is dense enough to block stray light without bending, yet the gasket provides the forgiving fit that cheaper strips lack.
Installation uses an engineered adhesive that the manufacturer claims removes cleanly with minimal wall damage. Real-world reviews confirm it holds steady through seasonal temperature swings, and several renters report successful removal after two years with only slight paint discoloration. The 72-inch length covers most standard window heights, though the thick material requires a sharp utility knife rather than kitchen scissors for cutting.
The primary trade-off is the adhesive’s strength — alignment must be precise on the first attempt, as repositioning can stress the bond. For smooth walls, this is the most reliable way to achieve near-total blackout around cellular or roller shades without drilling holes.
Why it’s great
- Foam gasket seals uneven wall gaps that rigid PVC misses
- Adhesive holds firmly through heat and cold without loosening
- Removes cleanly after years of use, making it renter-friendly
Good to know
- Thick polystyrene is difficult to cut cleanly with standard scissors
- Adhesive sticks instantly, leaving little room for alignment error
2. Sleepy Time Tracks 60″ Removable
The removable version from Sleepy Time Tracks swaps permanent adhesive for a magnetic attachment system, making it the top choice for renters or anyone who needs to access tilt-in windows, clean window sills, or remove shades entirely. The patented foam gasket is retained from the permanent model, so you still get the conforming seal for uneven walls — a rare combination in the magnetic track space where most competitors rely on rigid plastic alone.
Each set covers one window, and the 60-inch length is slightly shorter than the permanent version, which better suits standard bedroom windows without excess material to cut. The magnetic hold is strong enough to keep the strips in place during daily shade operation, yet they pop off without tools for cleaning. Several reviewers note that the strips prevented a shade replacement by solving side gaps that were undermining expensive blackout blinds.
One limitation is that magnetic strips do not adhere to metal window frames without additional tape, and the initial cost per window is higher than basic PVC stick-on tracks. For damage-free installation on smooth walls, this system delivers peace of mind that cheap adhesive strips cannot offer.
Why it’s great
- Magnetic attachment allows easy removal for cleaning or window access
- Foam gasket seals uneven walls better than rigid PVC alternatives
- No adhesive damage risk on painted surfaces
Good to know
- Requires bare minimum window frame depth for magnet clearance on casement windows
- Higher per-window cost compared to entry-level adhesive strips
3. WINSMAR Magnetic 58.5″
The WINSMAR Magnetic side tracks stand out for their light-absorbing black interior lining — a detail that most white PVC strips lack. When light does hit the back of the track, the black surface absorbs rather than reflects it back into the room, reducing glare on TV screens and improving perceived darkness. The magnetic attachment works similarly to the Sleepy Time Removable set, popping on and off for tilting windows or shade removal.
These strips measure 58.5 inches and are made from rigid PVC that cuts with a hacksaw or hand saw — kitchen scissors will struggle with the material thickness. The adhesive backing on the magnetic base strips is extremely sticky, so alignment must be correct on the first press. Users report significant darkness improvement in bedrooms with cellular blackout blinds, and the black interior is particularly appreciated by home theater owners.
The main drawback reported is that the rigid PVC body lacks a compressible gasket, meaning it cannot fully seal against bumpy or textured walls. A few users also noted the lack of included instructions or hardware, requiring some improvisation with nano tape for a complete seal. For smooth-wall installations where magnetic convenience matters, the black lining gives these a genuine performance edge.
Why it’s great
- Black interior lining absorbs stray light instead of reflecting it
- Magnetic design enables quick removal for cleaning or tilting windows
- Durable rigid PVC resists bending and warping over time
Good to know
- No foam gasket means imperfect seal on textured or uneven walls
- No printed instructions or mounting hardware included in the package
4. Boolegon Roller Shade
The Boolegon Roller Shade takes a different approach — instead of an add-on side track, it integrates a top baffle and uses a 38mm roll tube that reduces the side gap between the fabric and the window frame. This design minimizes the very light leak that side tracks are meant to solve, making it a strong all-in-one option for buyers who want a complete shade rather than a retrofit accessory.
The linen fabric offers a textured, natural look that feels more refined than standard polyester blackout materials, and the cordless spring mechanism allows infinite stop positions without hanging cords. Custom sizing is available for windows that don’t match standard dimensions, and the fabric is laser-cut to eliminate frayed edges. Multiple reviewers note that three shades installed side-by-side on a large window left minimal inter-shade gaps, which is rare for multi-shade installations.
The trade-off is that the built-in design cannot match the side-seal tightness of properly installed aftermarket PVC tracks on very bright windows. The top baffle helps, but ambient light at the fabric edges still exceeds what a dedicated L-shaped track blocks. For bedrooms where 95% darkness is sufficient and aesthetic fabric matters, this is the cleanest visual solution.
Why it’s great
- Thickened 38mm roll tube reduces side gap compared to standard roller shades
- Linen fabric provides a natural, textured look with no chemical odor
- Cordless lift system is safe for households with children or pets
Good to know
- Side light seal is not as absolute as dedicated L-shaped track strips
- Inside mount requires a minimum 2-inch window frame depth
5. LazBlinds Cordless Cellular Shade
The LazBlinds Cordless Cellular Shade uses a patented no-drill spring rod system that expands inside the window frame, requiring zero holes and zero tools. This makes it the fastest path to a functional blackout shade for renters or anyone hesitant to drill into window trim. The honeycomb cell structure includes a silver-plated inner layer that blocks sunlight and UV rays while providing thermal insulation against summer heat and winter cold.
The cordless mechanism raises and lowers smoothly with a simple push or pull, and the spring rod expands up to one inch to accommodate minor width variations in the window frame. Multiple long-term users report that the shade holds its position without sagging, and the polyester cell material resists moisture in humid climates. Several reviews mention using these shades on vinyl windows where traditional screw mounts would void a warranty.
Because this is a complete shade rather than an add-on track, the side light seal depends entirely on the inside-mount fit. The standard 2/5-inch width deduction leaves a small gap that may still need supplementary light-blocking strips for total darkness. For quick, damage-free installation that delivers good blackout performance without extra hardware, this is the most convenient option available.
Why it’s great
- No-drill installation installs in under a minute without tools
- Silver-plated honeycomb cell blocks sunlight and provides thermal insulation
- Cordless mechanism is safe for children and pets with no exposed strings
Good to know
- Inside mount only — not suitable for windows without a deep frame well
- Standard width deduction leaves a small side gap that may need extra sealing
6. ZSTARR PVC Light Blockers
The ZSTARR PVC Light Blockers offer the most direct solution for the common side-gap problem at an entry-level price point. These L-shaped PVC strips use simple peel-and-stick adhesive to attach directly to the window frame, requiring no special tools other than scissors for trimming to length. The 58-inch length covers most standard windows, and the white finish blends reasonably well with white frames and blinds.
Real-world users praise the strong adhesive bond and the ease of cutting the PVC to custom lengths. The material is flexible enough to conform to minor surface variations but does not include a compressible gasket, so textured walls may still show light bleed at the edges. Proper installation requires placing the strip as flush as possible against the face of the shade — misalignment by even a few millimeters reduces the seal effectiveness.
The main risk reported is the extremely strong adhesive — if the strip is installed crooked or needs removal, it can peel paint from the wall or snap the PVC during attempted removal. Several reviewers recommend careful measurement and a steady hand on first application. For perfectly smooth window frames where a permanent bond is acceptable, these deliver effective side sealing at a fraction of the cost of premium alternatives.
Why it’s great
- Simple peel-and-stick installation requires no tools or hardware
- PVC material is easy to trim with household scissors for a custom fit
- Strong adhesive holds strips firmly in place for long-term use
Good to know
- Adhesive is extremely permanent — removal can peel paint or damage walls
- No foam gasket means light may still seep through on textured surfaces
7. Blindify PVC Light Blockers
The Blindify PVC Light Blockers are functionally similar to the ZSTARR strips, offering L-shaped PVC blockers with adhesive backing for straightforward peel-and-stick installation. The 58-inch length and 1.6-inch width match the standard profile for window side tracks, and the white color coordinates with most window frames. The 3M-brand adhesive tape provides reliable initial grip on clean, smooth surfaces.
Users confirm that these strips effectively cut down daylight leakage around roller shades and cellular blinds, with several noting that the adhesive holds securely even during seasonal temperature changes. The PVC material cuts with sturdy kitchen scissors or a hacksaw, though some reviewers found cutting the rigid plastic to be physically challenging without a proper saw. The instructions recommend cutting before removing the backing tape to avoid adhesive contact during trimming.
The most common complaint is that the strips are not true blackout material — some light passes through the PVC itself when held directly against a bright light source. On windows with very intense sunlight, the translucent edges of the material can emit a glow. For darker rooms where total blackout is not critical, these provide a cost-effective solution for reducing the most bothersome side leaks.
Why it’s great
- 3M adhesive tape provides strong initial hold on clean surfaces
- Trimmable with scissors or hacksaw for custom window lengths
- Affordable entry point for testing whether side tracks solve your light leak
Good to know
- PVC material is not fully opaque — some light passes through the plastic
- Hard to cut cleanly without a hacksaw; scissors may produce rough edges
FAQ
Can I use blackout side tracks with any type of window blind?
How do I prevent the adhesive strips from peeling paint when removed?
What is the best way to cut PVC side tracks to the correct length?
Final Thoughts: The Verdict
For most users, the best blackout blinds with side tracks winner is the Sleepy Time Tracks 72″ Permanent because its foam gasket seals uneven wall gaps that rigid PVC strips cannot touch. If you need damage-free removal for rental properties or frequent window access, grab the Sleepy Time Tracks 60″ Removable. And for a complete no-drill shade solution that skips the aftermarket strips entirely, nothing beats the LazBlinds Cordless Cellular Shade.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.