What is Window Film and How Does It Work?

Window film is an extremely thin layer of multi-layer polyester that is applied to the inner or outer surface of the glass. These layers, made with special compounds, can control light, heat, ultraviolet (UV), and infrared (IR) rays.
The result is that your building stays cooler in summer, warmer in winter, and more resistant to various risks.

Window films are divided into several main categories based on their application, which we will explain below.

Types of Window Films by Parsian Fajr Sepehr Company

1. Security Film

For spaces where safety is the top priority, security films are the best choice.
These films, with greater thickness and very strong adhesion, resist impact, object projection, or even explosion. In the event of glass breakage, the fragments are held together by the film, preventing scattering.
Applications: Banks, commercial centers, schools, hospitals, villas.
Features: High resistance, maintains glass appearance, prevents burglary, increases durability.

2. Safety Film

For spaces where there is a risk of glass breakage but anti-theft protection is not required, this type is more suitable.
Safety film is usually transparent and prevents the scattering of glass fragments in case of breakage.
Applications: Educational centers, halls, public buildings.
Features: Prevents injuries, high transparency, long lifespan.

3. Solar Control Film

One of the most popular types of window film is the solar model.
This film absorbs or reflects part of the light and heat from the sun, preventing the interior from overheating and reducing energy consumption by cooling systems.
Features:

• Reduces glare

• Blocks UV rays

• Saves energy

• Maintains glass transparency

Applications: Homes, offices, shops, commercial towers.

4. Decorative Film

If aesthetics and design are important to you, decorative films are an ideal choice.
These films come in a variety of patterns and colors, creating an attractive look while enhancing privacy.
Applications: Offices, halls, interior home spaces.
Features: Matte, transparent, mirror, frosted, or sandblasted glass designs.

5. UV Protection Film

This model is designed to protect interior items from sunlight.
UV rays cause fading of furniture, curtains, and flooring. Using these films blocks up to 99% of harmful UV rays.
Applications: Museums, galleries, luxury homes, clothing stores.

Advantages of Using Window Film

1. Increased safety and security
   Prevents glass shards from scattering and reduces breakage hazards.

2. Reduced energy costs
   Controlling heat and light transfer lowers heating and cooling system use.

3. Increases lifespan of glass and interiors
   Prevents harmful rays from entering the building.

4. Beauty and privacy
   Decorative or reflective films maintain privacy without heavy curtains.

5. Quick installation without structural changes
   No need to replace glass; clean, fast, and cost-effective installation.

Guide to Choosing the Right Window Film

Choosing the right window film requires understanding your needs and environment.
For the best result, consider the following factors before selecting:

• Installation location: Interior or exterior

• Type of glass: Plain, tempered, laminated, or double-glazed

• Light transmission level: Visible Light Transmission (VLT) percentage

• Reflectivity level: For daytime privacy control

• Film thickness and strength: From 2mil to 12mil depending on security needs

The Parsian Fajr Sepehr consulting team provides professional advice to help you choose the best option for your project.

Installation Process by Parsian Fajr Sepehr

1. Inspection of glass type and precise measurement

2. Complete cleaning of the glass surface

3. Cutting the window film to exact dimensions

4. Spraying special installation solution

5. Placing and aligning the film precisely

6. Using a squeegee to remove bubbles

7. Full drying within 24–48 hours

All steps are carried out by trained technicians using professional tools to ensure the best quality and durability.

What is the Structure of Window Film?

This layer is responsible for creating adhesion between the film and the glass surface. The bonding process occurs through several mechanisms, including chemical bonding, mechanical bonding, and penetration into the glass structure. Thanks to this penetration, the glass becomes more resistant to impact, thus providing greater durability and strength against breakage.

Since the adhesive layer is the first part exposed to direct sunlight, it contains UV absorbers that prevent UV damage to the film’s structure and extend its lifespan. Therefore, modern window films are significantly more durable and long-lasting than older generations.