Choosing an adhesive to bond metal


When we talk about joining metal components together there are many techniques. Mechanical fixings like bolts and rivets can be used, as can thermal processes like welding and soldering. In a production line environment often speed is a key consideration and this is why bonding using adhesive is often used.

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Bonding using adhesive is not only quick it requires less skill than some other techniques, so there’s no wonder that the market for it is growing – And, although the bond may take time to cure, there are no issues with waiting for components to cool before work can continue, for example. Plus there’s no risk of heat causing distortion.

Ease of use

Adhesives can be easily applied with less training needed than for other techniques. They also help ensure consistency in the production process. Compared to mechanical fasteners which may work loose over time, adhesives remain consistent and some types can even tolerate some movement from expansion and contraction of the joint.

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There’s an aesthetic consideration too. Where exposed bolts or rivet heads may be unsightly or may present a snag hazard, a glued joint gives a cleaner look and safer use. Also, because there are no holes needed to be drilled for fasteners, there is less risk of stress fractures occurring due to the movement or flexing of components.

Special considerations

For the best results when using metal bonding adhesive from a supplier like it is, of course, important that components are properly prepared. Clean surfaces free of contaminants are essential for a strong bond. The surface of the material matters too. Having a roughened surface on which to apply the adhesive can deliver a stronger bond than if it’s perfectly smooth. This is especially true if using liquid glue, adhesive tape though can be used successfully on smooth surfaces.

It’s also important to choose an adhesive that will be compatible with both other stages of the production process, and with how the finished product will be used. For example, is paint going to be applied to the finished product? Also is it likely to be washed regularly or immersed in water? Will it be exposed to UV light or subjected to wide variations in temperature? All of these factors can have a bearing on your choice of adhesive.