The Quad Lock Universal Adaptor uses a 3M™ VHB 4952 Adhesive which will adhere to smooth, non-textured, non-porous surfaces such as: Plastics such as PC, ABS, PVC, Nylon, Acrylic Non-painted metals Un-coated glass The adhesive will not bond to the following substrates: Rubber, TPU, TPE Leather Silicone Hydrophobic coated glass (Also known as anti-fingerprint glass, which is found on the back of most modern smartphones) Soft touch coating or paint Low surface energy plastics such as Polypropylene (PP), Polyethylene (PE), Acetal, HDPE Wood We highly recommend using a case with the Universal Adaptor if your phone has a glass back. Please ensure the substrate is thoroughly cleaned and dry before applying the Universal Adaptor. The 3M™ VHB™ is a single use adhesive and is not reusable 3M™ VHB adhesive Slim profile (5mm thick) 48mm wide and 60mm tall Durable and tough composite construction Adheres to flat and slightly curved surfaces Compatible with Quad Lock® Original twist and lock Mounts The Quad Lock Universal Adaptor uses a 3M™ VHB 4952 Adhesive which will adhere to smooth, non-textured, non-porous surfaces such as: Plastics such as PC, ABS, PVC, Nylon, Acrylic Non-painted metals Un-coated glass The adhesive will not bond to the following substrates: Rubber, TPU, TPE Leather Silicone Hydrophobic coated glass (Also known as anti-fingerprint glass, which is found on the back of most modern smartphones) Soft touch coating or paint Low surface energy plastics such as Polypropylene (PP), Polyethylene (PE), Acetal, HDPE Wood We highly recommend using a case with the Universal Adaptor if your phone has a glass back. Please ensure the substrate is thoroughly cleaned and dry before applying the Universal Adaptor. The 3M™ VHB™ is a single use adhesive and is not reusable.