Gypsum Board corner tape is a specially designed tape used in drywall and plastering to reinforce and create clean, straight corners—both internal and external. It typically features a crease down the center for easy folding and alignment, ensuring a strong bond and crack-resistant finish. Made from materials like paper, fiberglass mesh, or metal-reinforced composites, corner tape improves durability and helps prevent damage from impact or settling. It's essential for achieving sharp, professional-looking corners in walls and ceilings.