What are the six general types of adhesives and what are they best used on?

The six general types of adhesives include:

1. Polymer adhesives (e.g., epoxy, polyurethane) - best for bonding plastics, metals, and wood due to their strong and flexible nature.
2. Hot melt adhesives - ideal for porous materials like paper and cardboard, commonly used in packaging and crafts.
3. Contact adhesives - effective for bonding large surfaces such as laminates and veneers, as they allow for immediate holding strength.
4. Pressure-sensitive adhesives - used for tapes and labels, these work well on smooth surfaces and allow for repositioning before setting.
5. Structural adhesives - suitable for heavy-duty applications like automotive and aerospace, providing significant strength and durability.
6. Water-based adhesives - commonly used in woodworking and paper projects, as they are easy to clean up and less toxic.