Wood glue is an essential adhesive used in woodworking, carpentry, and DIY projects for bonding wooden workpieces together. 

Types of Wood Glue

There are several types of woodworking glues available, each with its own characteristics and applications. Here are some common ones:

• Polyvinyl Acetate (PVA): This is one of the most common types of wood glue. PVA glue is easy to use, dries relatively fast, and is suitable for most woodworking projects.
• Aliphatic Resin (Yellow Glue): Often referred to as yellow glue, aliphatic resin glue has a slightly longer open time and a stronger bond, making it suitable for complex glue-ups.
• Epoxy Resin: Epoxy is a two-part adhesive that is valued for its strength and durability. Moreover, it has excellent gap-filling properties, and is effective for gluing varied materials like wood to metal.
• Polyurethane: Polyurethane glue expands as it cures. It is suitable for projects that require filling gaps or gluing uneven surfaces. Additionally, it is also waterproof, and suitable for outdoor applications. 
• Cyanoacrylate (CA):  Often referred to as super glue, it is a fast-setting adhesive that is useful for quick repairs and bonding small workpieces. However, it is not ideal for large-scale woodworking projects. 
• Hide Glue: Made from animal collagen, hide glue is available in liquid or granular form. It is suitable for antique restoration and traditional woodworking.
• Hot Melt Glue: Hot melt glue is applied with a glue gun. It sets quickly and is suitable for temporary or non-structural woodworking applications.

Buying The Right Glue

The choice of woodworking glue depends on the specific project requirements, such as the type of wood, the strength needed, the drying time, and whether the bond needs to be waterproof or reversible.

Always follow the manufacturer’s instructions for the specific glue you are using to ensure the best results in your woodworking projects.