Jointing filler and jointing compound may seem similar, but they serve different purposes that contribute to the overall quality and durability of the final result. Jointing filler is used for filling and patching gaps, cracks, and holes in surfaces, while jointing compound, often referred to as 'mud,' is specifically designed for finishing drywall seams and joints. Here's a closer look at each product and how they differ. For in-depth information on drywall finishing, see the comments section!