According to the product description on The Home Depot, Flex Super Glue Gel 20g Bottle is an instant adhesive that bonds instantly and is extremely durable. It is designed to work on all types of household repairs, including plastic, metal, ceramic, leather, wood, paper and more. Therefore, it is likely that Flex Seal SGGELB20 GLUE SUPER GEL 20G BOTTLE will hold metal. However, please note that the product is not recommended for use in aquariums where animals come into contact with the product.