Window shades are a common choice for controlling light, but even the best-installed shades often leave narrow gaps along the sides. These gaps allow light to seep through, which can be a nuisance in bedrooms, home theaters, or any space where complete darkness is desired. The ZSTARR PVC Light Gap Blockers are designed to address this issue. This review examines what they are, how they work, and whether they are worth considering.
The ZSTARR blockers are made from white PVC and come in a set of four pieces, each 79 inches long. They are intended to be attached to the sides of window shades to create a light-blocking seal. The PVC material is semi-rigid, allowing it to bend slightly to conform to the window frame, but it holds its shape well. Installation is typically done using adhesive strips or small screws, depending on the surface. The white color is meant to blend with common window trim and shade hardware.
In real-world use, these blockers are most effective for roller shades, cellular shades, and other types that are mounted inside the window frame. They are less useful for curtains or drapes, which already have more overlap. The primary use case is in rooms where light control is critical: bedrooms for shift workers, nurseries, or media rooms. The blockers are installed vertically along the sides of the shade, covering the gap between the shade and the window jamb. This can significantly reduce the amount of light that leaks in, especially during early morning or late evening hours.
- Material: PVC, white
- Length: 79 inches per piece
- Quantity: 4 pieces
- Installation: Adhesive or screw-mounted (hardware not included)
- Compatibility: Best for inside-mount shades
One of the main advantages of these blockers is their simplicity. They do not require any electrical work or complex assembly. For renters, the adhesive option is appealing because it can be removed without damaging the window frame, though the adhesive may leave residue if not carefully removed. For homeowners, screwing them in provides a more permanent solution. The PVC material is also easy to clean with a damp cloth.
However, there are limitations. The 79-inch length may be longer than needed for some windows, requiring cutting to size. Cutting PVC can be messy and may leave rough edges if not done carefully. Also, the blockers are only as effective as their installation; if they are not aligned properly, light can still leak through. They are not a cure-all for poorly fitted shades; if the shade itself is warped or the window frame is uneven, the blockers may not seal perfectly. Additionally, the white color may not match all decor, though it can be painted.
Compared to alternative solutions like blackout curtains or window films, these blockers are a more targeted fix. Blackout curtains cover the entire window and can be more effective but also more expensive and bulky. Window films are permanent and can be difficult to remove. The ZSTARR blockers offer a middle ground: they are relatively inexpensive, easy to install, and address a specific problem. However, they are not as aesthetically pleasing as custom-made light-blocking shades, which are designed to fit precisely and often come with side channels.
Who are these for? They are suitable for DIY enthusiasts who are comfortable with minor modifications and want a low-cost solution to light leaks. They are also good for renters who can use the adhesive method. They are not suitable for those who want a completely seamless look or who have very irregular window frames. If you have a high-end home theater and demand absolute darkness, you might need a more professional solution. But for a typical bedroom, these blockers can make a noticeable difference.
In terms of performance, users can expect a reduction in light, but not necessarily total blackout. The blockers cover the side gaps, but light can still come through the top and bottom of the shade. To achieve near-total darkness, you may need to combine these with a top-down/bottom-up shade or additional seals. The PVC material is opaque, so it does block light effectively where it covers. However, the adhesive may not hold up in very humid environments or over time, so checking periodically is wise.
Overall, the ZSTARR PVC Light Gap Blockers are a practical, no-frills solution for a common problem. They are not a miracle product, but they do what they claim when installed correctly. The price point is reasonable for a set of four, making them an accessible option for many households. If you are dealing with annoying light gaps and want a simple fix, these are worth considering. Just be prepared to put in a little effort to get them right.