Any number of projects might require two or more pieces of metal to be attached to each other. In most cases, regular glue found around the typical household does not work well as a long-term adhesive. Instead, a metal adhesive usually should be chosen, and among those available are polyurethane, epoxy, resin, and Liquid Nails®.
A metal adhesive made of polyurethane is typically known for its strength. At the same time, this type is also usually quite flexible despite its resilience. An extra perk is that it is resistant to water. For projects that rely on a particularly durable bond, polyurethane adhesives are often recommended.
Epoxies are also a popular item used to hold metal together, which is why they often come in the form of sealants, adhesives, coatings, and other similar products. An epoxy adhesive can form a strong bond with metal, and can also fill in gaps. Additional properties of this type that are useful for metal bonding include good electrical insulation and resistance to both shock and chemicals.
Resin is another adhesive product that can keep metal together well, but it is usually known for being slow to dry compared to other types of glue. While acrylic is a type of resin, it is one of the faster-drying kinds. Acrylic metal adhesive is also usually suitable to be used in outdoor projects, as it can withstand both water and extreme weather. Cyanoacrylate, known to most people as superglue, is just one popular type of acrylic adhesive.
Liquid Nails® is often used in construction projects, though many people use it for smaller projects at home as well. Unlike some types of glue, it will not become discolored in the sunlight, so it is usually not noticeable. Other qualities are that it is inflexible and waterproof.
Some projects call for welding, soldering, or mechanical fastening rather than using glue, but the majority of household tasks are better off involving an adhesive product. A metal adhesive is preferable to many people because it usually can be obtained at most home improvement stores for a reasonable price, while welding or fastening materials and knowledge are not typically common. In addition, a metal adhesive often fits perfectly into small, uneven areas on metal, and is usually invisible.
No matter what type of adhesive product is chosen, the metal in question typically should be prepared before the glue is applied. The surface needs to be clear of debris, and the application directions on the package should be thoroughly read. Clamping the metal pieces together can help ensure that they dry as fast as possible.