• STEK SMART+ 20 window tint shade shown on a car window shape
  • STEK LUNARAY SMART+ advanced nano-ceramic window film with up to 99% UV, 96% SIRR, 62% IRER and 64% TSER
  • Family in a car with STEK LUNARAY SMART+ window film, showing lifetime warranty, nano-ceramic cooling and no signal interference
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STEK

STEK SMART+ 20 Window Film

Size
€750,00
€750,00
Tax included. Shipping calculated at checkout.

Free delivery over €100 to Ireland & NI

Click & collect from our Galway studio

Tested and used in our detailing studio

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STEK SMART+ 20 window tint shade shown on a car window shape
STEK LUNARAY SMART+ advanced nano-ceramic window film with up to 99% UV, 96% SIRR, 62% IRER and 64% TSER
Family in a car with STEK LUNARAY SMART+ window film, showing lifetime warranty, nano-ceramic cooling and no signal interference

Description

STEK LUNARAY SMART+ 20 Window Film is an advanced nano-ceramic window tint with nano-ceramic particles dispersed throughout the base material. It delivers excellent heat rejection, high optical clarity and strong UV and glare protection, in a film that never fades.

SMART+ is engineered to block a wider range of infrared rays, including longer wavelengths, so the cabin stays cooler and the air conditioning has less work to do. With no metal layers, there’s no interference with phone, GPS or radio signals.

With 22.4% visible light transmittance, SMART+ 20 gives a dark, neutral black look with strong privacy, while blocking 99.8% of UV rays and reducing glare by 75%. It’s backed by a limited lifetime warranty.

Available in a 1.524m roll width.

  • Advanced nano-ceramic construction
  • 22.4% visible light transmittance with a neutral black colour
  • Blocks 99.8% of UV rays – certified by the Skin Cancer Foundation
  • Up to 78.2% IR rejection (1400nm) and 53% IRER
  • 54% total solar energy rejection (TSER)
  • 75% glare reduction
  • No signal interference for phones, GPS and radio
  • High optical clarity with minimal haze
  • Scratch resistant with lasting colour stability
  • Easy to install and shrink
  • Limited lifetime warranty against fading, bubbling and cracking

Specification STEK SMART+ 20
Technology Nano-ceramic
Thickness 1.5mil / 2ply
Visible Light Transmittance 22.4%
Visible Light Reflected — Exterior 4.7%
Visible Light Reflected — Interior 4.7%
Solar Energy Transmittance 27.4%
Solar Energy Reflectance 4.8%
Solar Energy Absorbance 67.8%
IR Rejection — IRER 780–2500nm 53.0%
IR Rejection — SIRR 900–1000nm 61.1%
IR Rejection — SIRR 1400nm 78.2%
UV Rejection 99.8%
Solar Heat Gain Coefficient 0.46
Glare Reduction 75.0%
TSER 54%
Shading Coefficient 0.53
Warranty Limited lifetime

Compare STEK 20% window films

Feature ICY 20 SMART+ 20 NEX+ 20
Technology Metallized Nano-ceramic Graphene nano-ceramic
Visible Light Transmittance 19.9% 22.4% 22.1%
UV Rejection 99.0% 99.8% 99.8%
IR Rejection (1400nm) – 78.2% 98.1%
TSER 48% 54% 63%
Signal Interference Minimal None None
Best For Value privacy tint Ceramic performance Maximum heat rejection

A smart step up from metallized film for installers who want ceramic heat rejection, clarity and zero signal interference at a great price.

The warranty applies when SMART+ is installed by an authorised STEK Automotive installer or dealer.

Product Details

WHAT IS STEK LUNARAY SMART+ 20?

STEK LUNARAY SMART+ is an advanced nano-ceramic window film range. Nano-ceramic particles are dispersed throughout the base material, giving excellent heat rejection, high optical clarity and strong UV and glare protection. It never fades, and with no metal layers there is no interference with radio, phone or satellite signals.

SMART+ 20 is a dark shade with 22.4% visible light transmittance and a neutral black colour, backed by a limited lifetime warranty.

PERFECT FOR:
- Privacy tint installations with ceramic performance
- Customers upgrading from carbon or metallized tint
- Vehicles where signal interference matters
- Rear passenger windows
- Rear windscreens, where legally permitted
- Heat and glare reduction
- UV protection for occupants and interiors
- Professional tint installers

Product Name: STEK LUNARAY SMART+ 20 Window Film
Type: Automotive window tint film
Series: LUNARAY SMART+
Technology: Nano-ceramic
Thickness: 1.5mil / 2ply
Shade / VLT: SMART+ 20 / 22.4% visible light transmittance
Visible Light Reflected: 4.7% exterior / 4.7% interior
Solar Energy: 27.4% transmittance / 4.8% reflectance / 67.8% absorbance
IRER (780–2500nm): 53.0%
SIRR (900–1000nm): 61.1%
SIRR (1400nm): 78.2%
UV Rejection: 99.8%
SHGC: 0.46
Glare Reduction: 75.0%
TSER: 54%
Shading Coefficient: 0.53
Base Material: Optical-grade PET
Hard Coating: Anti-scratch coating
Adhesive: Urethane-based laminating adhesive, acrylic-based pressure-sensitive adhesive
Liner: Silicone-based liner
Signal Interference: None
Warranty: Limited lifetime against fading, bubbling and cracking (authorised installer)
Application: Interior side of flat and curved automotive glass
Use: Professional automotive window tinting
Brand: STEK

How to use it?

STEK SMART+ 20 is intended for professional interior application on flat and curved automotive glass, by skilled, trained and authorised installers.

Basic installation workflow:
1. Clean the glass thoroughly
2. Prepare the window film and liner
3. Apply slip solution to the glass
4. Position the film on the interior side of the glass
5. Squeegee out solution and air
6. Shrink where required for curved glass
7. Trim and finish edges professionally
8. Allow proper drying and curing time

Pro Tip: Always check local tint laws before installation, especially for front side windows and windscreens.

STORAGE & HANDLING NOTES:
- Store in original packaging
- Keep rolls horizontal
- Avoid direct sunlight during storage
- Avoid extreme temperature ranges
- Do not place heavy objects on top of packaging
- Recommended storage temperature: 20 ±2°C
- Recommended relative humidity: 40–60%

Safety Data Sheet

STEK SMART+ 20 TDS