What's the strongest glue for metal?

There are several strong glues available for bonding metal, but the strongest glue for metal is generally considered to be epoxy adhesive. Epoxy adhesives are known for their high strength and durability, making them suitable for bonding various types of metal surfaces. They can create a strong and long-lasting bond, even in harsh environments. However, it is important to select an epoxy adhesive specifically designed for metal bonding and follow the manufacturer's instructions for optimal results.