Doctor Who Tardis Car Window Vinyl Decal Sticker 5" Tall | Keen150 This is a vinyl, die cut decal....WAY better than a bumper sticker. The material used is made to last 6 years on the outside of your vehicle but can be applied to most clean smooth surfaces. This product applies to your car similar to how you apply a temporary tattoo.... ...dont worry, we provide indepth application instructions. The transfer tape that we use on our products is clear, which makes for easy application