Joint tape is a specialized reinforcing material used in construction to cover seams between drywall or plasterboard panels. Embedded in joint compound (mud), it bridges gaps and provides high tensile strength to stop walls and ceilings from cracking as buildings shift and settle. Spanned over flat seams where two drywall boards meet to lock the joint compound in place. Distributes structural stress evenly, stopping cracks from forming along panel edges over time. Folded down the middle along an inner crease to create sharp, clean, and stable 90-degree inside wall corners. Used to bridge gaps when repairing large holes or damaged sections of drywall.