Window Film Glossary
Every window film term, explained
Plain-English definitions for the metrics, materials and install techniques you'll see in every window tint quote in Dayton, Ohio.
- Architectural film
- Window film designed for buildings — not cars.
- Architectural window film is engineered for flat residential and commercial glass. It uses different adhesives, scratch-resistant coatings and warranty terms than automotive film and is the only category permitted under most window manufacturer warranties.
- Ceramic film
- Heat-rejection film made with non-metallic ceramic nanoparticles.
- Ceramic films use nano-ceramic particles instead of dyes or metals to reject infrared (IR) heat. They are signal-friendly (don't block cell or GPS), color-stable, and the highest-performing residential and commercial film category. Examples: Avery Dennison Nano Ceramic IR, Avery Dennison NR Pro, Madico Wincos.
- Dyed film
- Older, lower-cost film that uses dye for tint and heat rejection.
- Dyed films absorb heat rather than reflect it and fade to purple over time. Cheap and dark, but short-lived. Almost never used by reputable architectural installers in 2024+.
- Dual-pane / IGU
- Modern insulated glass with two panes and a sealed air gap.
- An insulated glass unit (IGU) traps argon or air between two panes for insulation. Some films can stress dual-pane seals if mismatched — only manufacturer-approved films should be installed on IGUs to preserve glass warranties.
- Low-E glass
- Glass with a thin metallic coating that reflects heat.
- Low-emissivity (Low-E) glass already rejects some heat from the factory. Adding solar film to Low-E glass requires a film matched to the specific Low-E coating to avoid thermal stress fractures.
- VLT — Visible Light Transmission
- % of visible light passing through the film + glass.
- Higher VLT = clearer / brighter. A 70% VLT film is nearly invisible; a 5% VLT film is limo-dark. Residential ceramic films are typically 35–70% VLT; commercial solar films often 15–50% VLT.
- TSER — Total Solar Energy Rejected
- % of all solar energy (visible + IR + UV) blocked.
- The single most-honest performance number. Premium ceramic films hit 60–80% TSER. Marketing often quotes IRR (infrared) which is a higher number but only one slice of solar energy.
- IRR — Infrared Rejection
- % of infrared heat blocked.
- Infrared rejection sounds dramatic — premium films advertise 95%+ IRR — but IR is only ~53% of solar energy. Always look at TSER alongside IRR.
- UVR — UV Rejection
- % of ultraviolet light blocked. Premium films = 99%.
- UV is the primary cause of fading on hardwood, fabrics, art and skin damage. Virtually all professional window films block 99%+ UV — the differentiator is heat rejection, not UV.
- SHGC — Solar Heat Gain Coefficient
- Energy code metric for solar heat passing through glass.
- SHGC ranges 0–1. Lower = less heat gain. Used in commercial energy modeling and LEED projects to quantify the cooling-load reduction from window film.
- Mil rating
- Thickness of security film in 1/1000ths of an inch.
- Standard solar film is ~1.5 mil. Security film starts at 4 mil and goes to 15 mil. 8 mil is the most common single-layer security spec. 12–15 mil is used for blast mitigation and high-threat retail.
- Daylight one-way film
- Reflective privacy film that works only when interior is darker than exterior.
- Daytime privacy films use a reflective face that mirrors the brighter outdoor light. At night with interior lights on, the effect reverses — outsiders can see in. For 24/7 privacy use frosted or blackout film.
- PDLC / smart film
- Switchable film that turns clear → frosted electronically.
- Polymer Dispersed Liquid Crystal film clears when 24/48V AC is applied and frosts when off. Used in conference rooms, clinics, residential bathrooms. Premium product — typically $80–$150/sq ft installed including controller.
- Anti-graffiti film
- Sacrificial clear film that takes the vandalism instead of the glass.
- Optically-clear 4–8 mil film applied to storefronts, transit, restrooms. When etched or tagged, the film is replaced — not the glass. Pays back after one or two graffiti incidents.
- Anchor system
- Adhesive or mechanical attachment for security film to the window frame.
- Security film is dramatically more effective when anchored to the frame so the film + film-bonded glass stays attached during forced entry. Wet-glaze (Dow 995) and mechanical anchors are common.
- Glass breakage warranty
- Manufacturer warranty covering thermally-cracked glass after film install.
- Premium architectural films include a glass-breakage warranty when installed by an authorized dealer with a film matched to your glass type. Standard with Avery Dennison NR Pro, Avery Dennison and Madico premium series.
- Wet-glaze attachment
- Structural silicone bond between security film and window frame.
- Dow 995 structural silicone applied at the film/frame interface so security film transfers impact load to the frame instead of relying only on the original glazing bead. Standard for serious security installs.
- Edge-to-edge install
- Film cut to within ~1/16" of the glass edge.
- Modern professional installs put the film all the way to the edge of the visible glass — minimal gap, no exposed dust line. The opposite of cheap installs that leave a 1/4" gasket gap.
- Squeegee / fluid install
- The actual install process — soap solution under the film, squeegeed dry.
- Pro installs use a controlled soap-and-water slip solution that lets the installer position the film, then squeegee the fluid out from under it. Cure time is days to weeks depending on temperature and film.
- Film cure / dry-out time
- How long until the moisture haze under new film fully clears.
- Newly installed film often shows a slight haze, water pockets, or small bubbles for the first 7–30 days as residual install fluid evaporates through the film. Normal — not a defect.
- AIR / spectrally-selective film
- Film that lets visible light through but blocks IR heat.
- Spectrally-selective films (Avery Dennison NR Pro, Avery Dennison NR Pro) reject heat without darkening the room. Looks like uncoated glass, performs like a tinted film.
Term we missed? Send us a question — we'll add it.
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