This sticker is to cover the top portion of windshield. Check with your state rules before use on windshield. Do not obstruct your view and create a hazard to your ability to see while driving. Clean windshield portion with alcohol prior to installation. Line your sticker up to where you desire it to be and fasten it down with painters tape. Lift one side of the sticker to the halfway point and remove backing paper. Cut that section of backing paper away and slow lay that half of the sticker down smoothing as you go. Now you can lift the other half of the sticker and repeat the process. Use heat to smooth and adhere the sticker to the surface.