Q&A Will My Windows Bubble or Purple?
Unfortunately, there are many window films on the market that will bubble and turn purple over time. They are primarily made for the automotive market, where people are customizing used cars that they only plan to keep for a few years before selling them and moving on. For these customers, quality is less important than cost. These bargain-basement window films installed from DIY kits are often mass produced in the Eastern block. They use dyed coatings with very cheap adhesive that are only designed to last a few years. In no time, they begin to turn purple and bubble because the UV light is cooking the adhesive until it completely breaks down. Fading occurs because the UV inhibitors in the films are so low quality they quickly degrade and the light starts to break down the dye until it changes colour, usually turning from black or grey to purple.
Low quality window films use dyed coatings with very cheap adhesive that are only designed to last a few years. In no time they turn purple and bubble because the UV light is cooking the adhesive until it completely breaks down. These films are never used at Sunshade (or by any reputable installer, for that matter).
At Sunshade, our films don’t break down in this way because they are manufactured with premium UV light inhibitors on the film (found in the adhesive between the film and the glass). These UV inhibitors don’t break down, so the adhesive stays stable for decades. The other reason why the colour is guaranteed not to fade is because the colour is right inside the polyester film itself and is not a dye that is sprayed on like in cheaper films. This means the colour is protected behind mutliple barriers, keeping it safe from degradation.