The stickers is carved in pre-spaced vinyl or digitally printed to ecosolvent always pre-spaced , will fit on most smooth surfaces and curves. The materiael used is Avery fascal or ApaCast ( adhesive cast is professional material whose dowry larger and have glue on the back but no water in the solvent, this prevents any residue once it will remove the adhesive and in terms of durability is very superior as an adhesive not Cast ) Freebubble ( on the back of the adhesive is present a "alveatura" which allows air to escape ) . They mount Cleaning with soap and water and not being freebubble . there are resistant to water, mud, atmospheric and chemical agents such as alcohol , benzine, etc. ... The sticker comes with a transparent paper that tape for easy mounting as the adhesive does not have a real background . The stickers can be mounted and put under transparent using eco-solvent or water-based paint as required by law. The stickers is guaranteed to 9 years to weather and chemicals.