Shamrock Decals & Stickers Decals can be easily applied to windshield or any smooth surface such as the body of car or wall. Customized die-cut Decals and Lettering for your car or truck window. For Decals we are using only quality exterior vinyl films provided by Oracal and FDC. 5 to 7 years indoor and outdoor durability for bright and vivid colors. Easy to Apply! Easy Installation Instructions Included!