Pattex No More Nails Permanent Strips are super-strong double-sided mounting strips for easy, clean, strong, and permanent attachment of various materials. For indoor and outdoor household use. Pattex No More Nails Permanent Strips are suitable for attaching various flat materials such as wood, tiles, metal, glass, and various plastics (even PA, PE, and PP). Ideal for wall decoration, clocks, intercoms, shelves, skirting boards, house numbers, nameplates, small kitchen and bathroom accessories, hanging hooks, etc. Do not use on uneven surfaces, wallpaper, Teflon®, silicone, or adhesive-repellent surfaces.