Pre-mask is a must have on premium vinyl above 1 inch to add stability and for proper installation. Pre-masked vinyl is easy to apply dry or wet. We recommend applying all vinyl striping masked or not above 3 inch with a solution of water and a couple drops of detergent soap mixed and sprayed behind vinyl. Pre-mask is not needed on Standard, Reflective and Fluorescent. Click here for pricing. Outdoor life ratings are supplied by the manufacturer and should not be taken as a guarantee.