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Joint compound’s primary function is filling and finishing the joints between sheets of drywall. You probably connected the dots, but this is where the word “joint” in joint compound comes from. The drywall mud is spread between the sheets of drywall after installation to create a smooth wall surface. When paired with drywall tape and applied by an experienced hand, joint compound can make drywall seams totally disappear. TESTIMONIALS
Joint compound shrinks and cracks when drying more than spackle. Thanks to the additional binders, spackle is more elastic than joint compound, which allows it to hold its shape as it dries. Joint compound has a tendency to shrink and crack as it dries, especially in thicker applications.
