Several specific types of wood glue are used for a wide variety of home and commercial applications, but the adhesive is most commonly known to provide a strong bond between pieces of wood for carpentry, construction or crafting purposes. Wood glue used for general bonding does not always provide an unbreakable seal. The reason for this is that the glue might not bond well with itself, although it creates a remarkable bond with the wood. To solve this problem, clamps are used to tightly join the separate pieces. Other methods involve using tight joints that require little glue or to supplement the glue with screws or nails.
Wood Glue Types
Formaldehyde-based wood glues are used to make plywood under high temperature and pressure. Polyvinyl Acetate of PVA is a common hobby wood glue. Polyurethane glue, of which Gorilla Glue is a type, is water resistant and incredibly strong. Epoxies are well used for their ability to cure without pressure, in a wider temperature range and for their gap filling properties. In addition, Cyanoacrylate or super glue can be used to bond wood as well.
Specialty Wood Glue
Hide glue, or glue formed from the animal collagen, was used to join wood for centuries until synthetic glues such as PVA became available. This type of wood glue still enjoys use in special applications such as guitar making and antique restoration.