100% Blackout PVC Light Blockers for Window Shades and Blinds - Block Along The Sides of Blackout Blinds Great for Bedroom Nursery, Blocking Strips (White, 58.5", 2pcs)

These perfectly filled the 1/2" gap between my window casing and inside mount roller blinds making a very noticeable difference in light transmission into my bedroom. The pieces seem to be high quality, with a white vinyl exterior combined with a light absorbing black interior which faces the window when installed. With the blinds up you can hardly notice they are there, which was exactly my hope. Only issue I had was a slight lack of adhesion on part of the edge. Fixed it with some double sided gorilla tape and not a big enough deal to drop it down a star.

These are very well made and fit perfectly with my 2 cell blinds. I bought them in white and painted them with Rust Oleum plastic paint to match. They need to be cut with a hacksaw.

Not worth it-don't waste your money. Disappointed !The Item came broken in half!

These are well made window edge sun blockers. However unless you plan to never remove them it is an issue. When I went to remove them from one window, it tore off the paint and even some wood.

Works well for what it says. Did have to trim them a bit, no issues there. I would putting them below the top of your blinds, I think that would’ve helped the side gap (shown in 2nd picture).

Good

The product is of good quality and easy to install, will continue to buy next time

These work well though they are difficult to cut to size. What worked for me was wrapping the portion to be cut in painters tape and then using pencil to draw a line for the cut. I then used a Dremel tool with a cutting disc to carefully cut along the line, with the tape offering protection to the material underneath. Once the rough cut was done, I used a small drum sanding attachment on the Dremel to smooth everything down to the pencil line. Once that was done, I used some medium grit emery cloth to make any final adjustments by hand.The biggest issue that I had was that both lengths of blockers had their adhesive strips poorly applied. It was overlapping on onto the white section which meant that it had to be carefully cut/trimmed away before install. I spent more time dealing with this than the actual cutting or install process! These strips would be a 4 or 5 star rating if it weren't for this poor quality control.