Which bonding method uses a sticky adhesive such as epoxy or glue to hold materials together?

Which bonding method uses a sticky adhesive such as epoxy or glue to hold materials together?

• A. Adhesives
• B. Threaded fasteners
• C. Self-tapping screws
• D. Soldering

Answer: (A)

Adhesives bond parts with a sticky material that adheres to the surfaces and then cures to form a solid layer between them. Epoxy or glue are common examples of this approach. The strength of the joint comes from both the adhesive’s bonding to the surfaces (wetting and adhesion) and the adhesive’s own cohesive strength once cured. Surface preparation, material compatibility, adhesive type, and curing conditions all influence how strong and durable the bond will be. This method is useful when you want to join different materials, avoid holes or clamps, or distribute load over a larger area. It can also seal against moisture if the adhesive provides a good seal. But adhesives can be sensitive to temperature, humidity, chemicals, or long-term creep, and some joints are hard to disassemble. Threaded fasteners and self-tapping screws hold parts together by clamping with threaded hardware, which is a mechanical fastening method rather than an adhesive bond. Soldering joins by melting filler metal to fuse parts, creating a metallurgical bond rather than a sticky adhesive layer.

Adhesives bond parts with a sticky material that adheres to the surfaces and then cures to form a solid layer between them. Epoxy or glue are common examples of this approach. The strength of the joint comes from both the adhesive’s bonding to the surfaces (wetting and adhesion) and the adhesive’s own cohesive strength once cured. Surface preparation, material compatibility, adhesive type, and curing conditions all influence how strong and durable the bond will be.

This method is useful when you want to join different materials, avoid holes or clamps, or distribute load over a larger area. It can also seal against moisture if the adhesive provides a good seal. But adhesives can be sensitive to temperature, humidity, chemicals, or long-term creep, and some joints are hard to disassemble.

Threaded fasteners and self-tapping screws hold parts together by clamping with threaded hardware, which is a mechanical fastening method rather than an adhesive bond. Soldering joins by melting filler metal to fuse parts, creating a metallurgical bond rather than a sticky adhesive layer.