3M adhesive&Full Degree View Car Mount: Free extra bigger size 3M adhesive PC foundation, Twice deep steady and updated VHB 3M adhesive. much stickiness and durable, reusable and washable, greatly attaching the mount and foundation. When the installation, Clean the area with Alcohol Pad thoroughly and let it dry completely.Wonderfully attaching the mount and your dashboard.Don't forget to wait 12 hours before using, 3M adhesive needs time to cure for lamination!!!