What is the strongest glue for metal to metal?

There are several strong adhesives that are suitable for bonding metal to metal. Some of the strongest options include:

1. Epoxy: Epoxy adhesives are known for their exceptional bonding strength. They can provide a strong and durable bond for metal surfaces. Make sure to choose an epoxy specifically designed for metal bonding.

2. Cyanoacrylate (Super Glue): Cyanoacrylate adhesives, commonly known as super glue, can also be used for metal-to-metal bonding. They offer fast curing times and high bond strength.

3. Polyurethane: Polyurethane adhesives are known for their excellent bond strength and resistance to various environmental conditions. They can provide a strong bond for metal surfaces.

4. Structural Adhesives: Structural adhesives, such as acrylic-based adhesives or methacrylate adhesives, are designed for high-strength bonding applications. They can provide a strong and durable bond for metal-to-metal joints.

It is important to carefully read and follow the instructions provided by the adhesive manufacturer to ensure proper application and bonding strength.