Windows and glass doors are among the most vulnerable points in any building — and when glass breaks, flying shards become the real danger. 3M™ Safety S40 is an optically clear, 4-mil polyester film that holds broken glass firmly in place on impact, significantly reducing the risk of injury from flying fragments while blocking harmful UV rays that cause interior fading.

Applied to the interior surface of windows or doors, Safety S40 provides reliable shatter protection against spontaneous glass breakage, accidental impact, and seismic events — all without changing the look of your glass. For enhanced performance in higher-risk scenarios, it can be paired with 3M™ Impact Protection Attachment (IPA) systems, which are required for all windstorm, break-and-entry, and explosion mitigation applications.

Important to note: this film is designed to hold glass together and reduce flying glass hazards — it is not bulletproof and is not designed to stop determined intruders. For higher levels of security, consider upgrading to 3M Safety S80 or Ultra S800.

Every installation is backed by one of the most comprehensive warranties in the industry — limited lifetime for residential, and 10 years for commercial buildings — from 3M, a company that’s been engineering protection solutions for over a century.