- Stock: In Stock
- Model: Strata Ex 20
- Info: Price per square foot
Strata EX 20 – Exterior Mirror Window Film
Strata EX 20 is a silver reflective window film for exterior installation on homes, apartments and offices. It transmits 22% of daylight, reflects 83% of solar heat and blocks 99% of UV. During the day it gives a one-way mirror effect: people outside see a mirror, you keep a clear view out. At window-film-shop.com you can order it cut to your exact window sizes, with free cutting.
Strata EX 20 technical specifications
| Specification | Value |
|---|---|
| Color | Silver, mirrored |
| Visible light transmission (VLT) | 22% |
| Visible light reflectance | 58% |
| Visible light absorptance | 20% |
| Total solar energy rejected (TSER) | 83% |
| UV rejected | 99% |
| Type | Reflective |
| Application | Exterior |
| Scratch resistance | >2H |
| Structure | 2 ply |
| Installation method | Wet, with mounting solution |
| Lifespan | 4 to 6 years, depending on conditions |
Buy Strata EX 20 exterior mirror film cut to size
Strata EX 20 exterior mirror window film is sold by the square foot and cut to your exact window measurements. The current price per square foot is shown at the top of this page.
Order in 2 clicks, no registration.
Included free with every order:
- 3M squeegee or a full installation kit — your choice
- Mounting solution concentrate
- Free test piece of film
How to order Strata EX 20 in your window sizes
Enter your window measurements in inches and we cut each piece to match. No resizing, no trimming on site, no offcuts to pay for.
Our cutting service accepts both whole and fractional inches. A plain 24", a half size like 40 1/2", or exact fractions such as 24 14/32" × 40 12/32" — every piece is cut to the measurement you enter. Precise pieces make installation faster and give clean edges at the frame.
What Strata EX 20 does
- One-way privacy in daylight. Whichever side has more light is the side that mirrors. In daytime that is the street, so no one sees in while you see out. After dark, with the lights on inside, the effect reverses — curtains or blinds are needed then.
- Solar heat rejection 83%. The film sits on the outside of the glass, so heat is turned back before it reaches the window.
- Glare reduction. With 22% light transmission, harsh sun and screen glare drop noticeably.
- UV rejection 99%. Furniture, floors and fabrics fade far more slowly.
Where Strata EX 20 is used
- windows that cannot be filmed from inside
- ground-floor windows of houses and apartments facing a street or neighbors
- office and shop windows on the sunny side
- glazed balconies, patios and conservatories
Installation and care
Strata EX 20 is applied wet, with mounting solution, and squeegeed out — the same way as any other solar window film. Clean the glass thoroughly first: dust trapped under the film shows as bubbles.
Cleaning is straightforward. Standard household cleaners are fine; avoid abrasives and metal objects, which scratch the coating.
Because it is mounted outside, Strata EX 20 lasts 4 to 6 years depending on climate and exposure — shorter than an interior film, in exchange for reflecting heat before it hits the glass.
Related films
- Strata 20 — the interior version of this film, for windows you can reach from inside.
- Strata EX 35 — lighter exterior mirror film: 32% light transmission instead of 22%, better for small windows.
- Bronze EX 20 — same 83% heat rejection in a bronze tint instead of silver.
Every photo on this page shows the actual product. See also our mirror window tint films and one-way privacy window films.
