All-purpose or setting-type compound?

All-purpose (pre-mixed) is easier for beginners. Setting-type (powder) dries faster and is stronger but harder to sand. Pros often use setting-type for first coat and pre-mixed for finishing.

How many coats of compound?

Three coats minimum: tape coat, fill coat, and finish coat. Sand between each. Some joints may need a fourth coat.

Why do my joints crack?

Usually from applying too thick in one coat. Apply thin coats and let each dry completely. Setting-type compound is less prone to cracking.

Drywall Joint Compound

Drywall & Plaster

Compound

$10-$20 per 4.5-gallon pail

Drywall Joint Compound: Types & Application Guide (2026)

Prepared by Lumberama's Building Materials Team

|Last updated May 15, 2026|Sources & methodology

Drywall joint compound, commonly called mud, is used to embed tape, fill joints, cover fastener heads, and create smooth wall surfaces. It comes in pre-mixed (ready to use) and setting-type (powder) varieties. Multiple coats with sanding between them create an invisible joint ready for painting.

Key Features

Pre-mixed and setting-type options; All-purpose and specialty grades; Sandable to smooth finish; Multiple coat system; Available in pails and boxes

Specifications

Coverage: 1 gallon covers ~100 sq ft of joints. Setting types: 20

90 min options. Pre-mixed weight: ~60 lbs per 4.5-gallon pail. Shrinkage: minimal in quality products.

Applications

Joint taping and embedding; Fastener head covering; Skim coating; Corner bead finishing; Wall texture application

Installation Overview

Apply first coat to embed tape over joints. Let dry and sand lightly. Apply second coat wider than the first. Sand again. Apply thin finish coat, feathering edges wide. Final sand with 120-150 grit. Prime before painting.

Pros & Cons

Pros

✓ Creates invisible joints; Easy to sand; Multiple formulas available; Affordable; Forgiving for beginners with practice

Cons

✗ Multiple coats required; Generates lots of dust; Drying time between coats; Shrinks if applied too thick; Skill needed for smooth finish

Top Brands

USG (Sheetrock brand)

National Gypsum (ProForm)

DAP

Code Requirements

Must meet ASTM C475. All joints and fastener heads must be taped and finished per IRC R702.3.1. Fire-rated assemblies require specific taping per UL or GA listing.

Buying Tips

Pre-mixed all-purpose compound is best for beginners. Lightweight compound sands more easily. Buy a quality 12-inch taping knife for the finish coat. Practice on a scrap piece before your walls.