TL;DR
Joint compound is the gypsum-based paste, sold premixed or as setting-type powder, troweled over drywall seams, fastener heads, and corner bead in successively wider coats to create a smooth, paint-ready plane. Setting-type versions harden chemically in labeled times from 5 to 90 minutes and resist shrinking; premixed dries by evaporation and sands more easily.
What it means
Joint compound is the gypsum-based paste, sold premixed or as setting-type powder, troweled over drywall seams, fastener heads, and corner bead in successively wider coats to create a smooth, paint-ready plane. Setting-type versions harden chemically in labeled times from 5 to 90 minutes and resist shrinking; premixed dries by evaporation and sands more easily. Taping, topping, and all-purpose formulas split the work between bonding tape and finishing. Most repairs and finishes take three coats, sanded between, to reach a flat result under critical light.
Where it sits in the glossary
Joint compound is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
License: CC-BY-4.0 — quote freely with attribution to ProFix Editorial Team / ProFix Directory.