There are a number of reasons why a clear bra can turn yellow. Yellowing is most commonly caused by lack of material maintenance, film failure, certain climate conditions, or solvents that contaminate or stain the material. Although we don’t see it often, it does happen. A high quality clear bra product will be backed by the manufacturer against turning yellow. Be sure you get a manufacturer’s warranty card issued at the time of install, and most importantly – KEEP THE WARRANTY CARD. The current industry standard warranty period for clear bra is 5 years, and a few films offer 10 years of warranty coverage, depending on the product installed. Be sure to ask what the warranty period is and what the warranty covers before having any clear bra added to your vehicle.