Attaching glass and metal together isn't something that needs done on a daily basis, but there are times when it is necessary. It is popular in some craft making, and is commonly done when connecting a rear-view mirror to the windshield in a vehicle. Adhesives come in single-part type and two-part compounds, and are available at most hardware and auto parts stores. These strong adhesives require patience and care when being used.
Purchase a two-part glass adhesive designed to bond glass to another surface. Single-part adhesives will work, but have less bonding strength.
Spray glass cleaner onto a paper towel and wipe the glass down thoroughly. Don't just clean the area of the bond; spend the extra time to clean the entire glass surface. Allow the surface to dry for 15 minutes.
Clean the metal to remove dirt, grime, finger oil and any other substances. Use a mild liquid soap solution and water and lightly scrub at it with an abrasive sponge. Don't scratch the metal, but use enough pressure to clean it thoroughly. Rinse the surface with clean water and let the metal to air dry for half an hour.
Position the metal and glass pieces together to test fit them and ensure that you are happy with the location where they will bond.
Follow the instructions on the glass adhesive part of the glue compound. Apply the glass part of the compound and set the glass aside. Then apply the adhesive for the metal. Let both adhesives cure for approximately 1 minute.
Align the two adhesive-covered surfaces and verify that they are straight to each other. Once the materials touch they will instantly begin to bond. Press the metal and glass together and hold it as still as possible for 3 minutes until the bond is strong enough to hold together without support. Leave the glass and metal to dry for 1 hour before handling them again.
Plan to glue all metal and glass pieces at one time. Once the contents of the adhesive tubes are exposed to the air they will begin to dry and lose their adhesive qualities.
Avoid getting any adhesive on anything you don't want it on. Even brief contact leaves a residue behind that won't come off. Wash your hands or skin immediately if you get any of the two-part adhesive compounds on you.