Each year hundreds of millions of songbirds perish as a result of window strikes in America. Now you can be part of the solution. After two painstaking years of chemical engineering WindowAlert announces the ultimate product-UV Liquid. UV Liquid is designed to fill in the gaps between our decals on windows-providing complete window protection. WindowAlert decals catch the attention of birds. UV Liquid completes the visual barrier. Reflects UV sunlight. UV Liquid is easy to apply. Simply use our bingo marker to make dots on window glass. The dots dry to nearly clear last three months and are easy to remove. And they save songbirds!. Contents: 1.69 Fluid ounce bottle.