Will a webcam cover damage my laptop screen when closed?

The main risk with adhesive and sliding covers is thickness. Across verified-purchase reviewers, the most common complaint with thicker slide covers is screen pressure marks or a laptop that won't close flush, while the sub-1mm (0.023–0.03 inch) options are repeatedly described as thin enough to avoid that issue. If you have a thin-bezel ultrabook or MacBook, look specifically for covers advertised at 0.03 inch or thinner.