WE USE ONLY THE HIGHEST QUALITY ABC PLASTIC (NOT VINYL) AND DOUBLE SIDED TAPE PRECISELY LASER-CUT FOR PERFECT FIT LETTERS ARE COATED WITH POLYURETHANE FOR DURABILITY GREAT RESISTANCE TO LONG-TERM SUN EXPOSURE AND WEATHERING  CAR WASH SAFE TAKES ONLY A FEW MINUTES TO INSTALL INSTALLATION INSTRUCTIONS 1.Without removing the red backing protective tape "dry-fit" ALL pieces, noting correct placement. 2.Thoroughly clean the area where the pieces are to be applied with an rubbing alcohol to remove ALL residue and dirt. Let it dry. 3.Remove red tape from the back and apply pieces. It is not recommended to install letters when it's cold, let pieces be at least room temperature. 4. Remove white and/or clear protective tape from each letter.