Printed on durable vinyl with eco-solvent inks. Vinyl glue is semi-permanent. To ensure your sticker will last long and will not peel off, please make surface clean and dry (no fats or grease) so sticker could normally adhere to the surface. Stickers will stick properly to any flat or slightly curved non porous surface, ensuring working temperature is not below 0 degrees of celsius. For the first couple of days please have a look at stickers edges as they may curl eventually before adhesive will start to work on full power, usually happens during too cold or too hot weather conditions or inappropriate cleaning of surface.