UV Liquid


  1. WindowAlert UV Liquid may be used only on an exterior glass surface that is free of any overlay, tinting, film, or coating.
  2. Apply UV Liquid when glass is cool to the touch (early morning, overcast, shade, etc.). Cool conditions allow UV Liquid to slowly dry to clear.
  3. Clean glass thoroughly. Make sure glass is free of chemicals and cleaners before applying decals.
  4. Invert the bottle and press the felt tip against a cloth towel to break the seal behind the felt tip. You will hear a click.
  5. Very gently touch UV Liquid marker to the glass, forming a dot the size of a dime. To avoid dripping, do not touch too hard and do not squeeze the bottle.
  6. Attempt to create a "visual barrier" across the glass surfaces. Apply WindowAlert decals. Then, apply UV Liquid to areas between the decals.
  7. The ultraviolet reflectivity of UV Liquid will fade due  to exposure. For best results, reapply every four months or test with the WindowAlert UV Flashlight.
  8. Bottle lasts 12 months. If application turns milky, dispose and purchase new bottle.


  1. Remove UV Liquid in warm weather (midday, direct sun, etc.). The hotter the glass, the better.
  2. Liberally apply ammonia-based window cleaner to glass. Allow it to soak for a minute or more. Then, remove UV Liquid with an absorbent cloth or sponge.


Application to commercial buildings or sizable expanse of glass must be cleared by the glass manufacturer for your building and tested for easy application and removal before applying to the entire structure. Allow the test application to cure one week before testing removal.

For best results, use UV Liquid with WindowAlert Decals.

      Danger Zones

      1. Bird strikes often occur when birds perceive a LINE OF FLIGHT through one window of your home and out another. This also occurs on buildings with corners made of glass. In these situations, position your decals to block a bird's perceived line of flight.
      2. Bird strikes may occur when birds see OPEN SKY reflected in your window. This may occur on certain windows or areas of a window based on the time of day or orientation to the sun. Use your decals to break up this reflection of open sky.
      3. Bird strikes are often a problem near BIRD FEEDERS. Bird feeders should be positioned closer than three feet or farther than 30 feet from your windows. Feeding birds are easily frightened and then take wild, evasive flight. If your feeder is close to the window, birds fly away from the house when frightened. Believe it or not, the safest feeders are window feeders which attach to the window itself.
      4. Bird strikes are a problem with highly reflective windows, windows near bodies of water, and windows near indoor mirrors. These situations may be difficult to remedy.