Glue Gun

a sticky substance that is used for joining things together permanently, produced from animal bones and skins or by a chemical process. Synonym. gum. Examples. a blob of glue.Hot-melt adhesives (also known as hot glues) are generally 100% solid formulations based on thermoplastic polymers (no water or solvents are involved). Hot melts are sold in a solid state at room temperature and are 'activated' upon heating beyond their softening point which is usually between 50 and 160 degrees.