Security films holds the broken glass together when it’s applied to the glass, preventing dangerous shards from flying out apart when any accidents happens, or to make it more difficult for an intruder to gain entry to your property. It’s typically applied to commercial glass, these films are made of heavy-gauge plastic and are intended to maintain the integrity of glass when subject to heavy impact, The most robust security films are capable of preventing fragmentation of the hazardous glass shards and from other forces such as bomb blasts. Some companies have even experimented with bullet ballistics with multiple layers of security film. Another keyword applied for security window films are as known as (safety window films), most common security film is applied on large areas of "flat glass" such as storefront windows, sliding glass doors, and larger windows that are prone to high risk damaged area. These security films can applied to vehicles to provide safety protection. These security films are often tinted and can be up to 400 micrometer thick, compared to less than 50 microns for ordinary tint films. If anchored correctly, they can also provide protection for architectural glazing in the event of an explosion. A layer of 100 micron thickness or higher can prevent the ejection of spall when a projectile impacts on its surface will create those small dagger-like shards of glass that cause serious injury.

Here are some key features and benefits of security film:

1. Impact resistance: Security film is constructed with multiple layers of polyester film and strong adhesive. This makes the glass more resistant to impact and helps to hold it together when shattered, reducing the risk of injury from flying glass shards.
2. Burglary and break-in prevention: Security film acts as a deterrent against forced entry and break-ins. It makes it more difficult for intruders to penetrate the glass, as the film holds the broken pieces together, increasing the time and effort required to gain entry.
3. Shatter resistance: When glass covered with security film is subjected to high impact, it may crack or break, but the film helps to hold the glass fragments together. This can prevent the glass from shattering into sharp, dangerous pieces, reducing the risk of injury.
4. UV protection: Many security films also provide protection against harmful ultraviolet (UV) rays. They can block a significant amount of UV radiation, which helps to protect occupants and furnishings from sun damage, such as fading and discoloration.
5. Energy efficiency: Some security films offer thermal insulation properties, helping to regulate temperature by reducing heat transfer through windows. This can result in energy savings by reducing the need for excessive heating or cooling.
6. Privacy and glare reduction: Security film can be available in various levels of tint, offering privacy by limiting the view from the outside. Additionally, it can reduce glare caused by direct sunlight, improving comfort and visibility indoors.

It's important to note that security film is not impenetrable or bulletproof. While it enhances the strength and safety of glass, it has limitations and may eventually yield to extreme force. The effectiveness of security film can vary depending on the quality of the film, installation techniques, and the specific circumstances of an event.

Installation of security film typically involves cleaning the glass surface, cutting the film to size, and applying it with a special adhesive. Professional installation is recommended to ensure proper application and optimal performance.

Overall, security film provides an added layer of protection for windows and glass doors, enhancing security, safety, and privacy while offering additional benefits like UV protection and energy efficiency.