USG 384214 18 lb. Easy Sand 20 Joint Compound

• For interior gypsum panels and exterior gypsum ceiling boards
• Weighs 25% less than conventional setting-type compounds
• Sanding ease similar to a ready-mixed, all-purpose joint compound
• Unique humidity resistance
• Exceptional bond with low shrinkage
• Check-crack resistance in heavy fills
• 20 minute working time
• 25-35 minute setting time

Preparation: In cold weather during gypsum panel joint finishing, minimum surface, water, mix, and air temperature of 45 °F must be ensured until joints are completely dry. Adequate ventilation shall be provided to carry off excess moisture.

Gypsum Panel Joint Treatment: Position and apply Sheetrock® Brand Gypsum Panels in accordance with manufacturer’s recommendations. Joint Treatment Mix compound according to directions on bag. If using Sheetrock Brand Gypsum Panels, SW Edge, prefill the “V” grooves formed by abutting tapered eased edges of the panels with ay Sand. Apply compound directly over “V” groove with a flexible 5" or 6" joint finishing knife. Wipe off excess compound that is applied beyond the groove. Allow prefill compound to harden prior to the next application (tape-embedding coat).
Cover joint with a thin layer of compound and embed tape, leaving about 1/32 in. of compound under feathered edge and a thin layer over the tape. After compound has set, apply second coat, feathering out approximately 2 in. beyond first coat. After each coat is applied, smooth away any tool lap marks or other imperfections prior to hardening action. Finish fastener heads with three coats of joint compound; finish corner
bead and inside corners as required with at least two coats, feathered and smoothed out onto panel faces.
For priming and decorating with paint, texture, or wallcovering, follow manufacturer’s directions for materials used. All surfaces must be dry, dust-free, and not glossy. A prime coat of Sheetrock® Brand First Coat or a good-quality interior latex flat wall paint should be applied undiluted and allowed to dry before decorating. Walls to be covered with wallpaper or vinyl wallcovering should be sealed per manufacturer’s recommendations. To improve fastener concealment where gypsum panel walls and ceilings will be subjected to severe artificial or natural side lighting and be decorated with a gloss paint (eggshell, semigloss, or gloss), the gypsum panel surface should be skim-coated with conventional weight All Purpose or UltraLightweight All Purpose joint
compound to equalize suction before painting.

Filling and Finishing over Interior Poured Ceilings: Grind high plane differences in concrete level with adjacent area; also remove any form oil, efflorescence and greasy deposits. Prime exposed metal with a good rust-inhibitive primer. Fill offsets or voids with joint compound. Apply additional coats of joint compound as necessary, after each coat has set, but not necessarily dried. After the final coat of joint compound has dried, apply an undiluted coat of Sheetrock Brand First Coat or a good quality latex flat wall paint with high solids content over entire surface and allow to dry. For textured ceiling, apply Sheetrock® Brand Ceiling Spray Texture–QT in a uniform coat at a rate not exceeding 10 ft.2/lb.

Exterior Joint Treatment: Mix joint compound according to directions on the bag. Do not overmix or use at temperatures below 45 °F (7 °C). Prefill joints of Sheetrock® Brand Exterior Gypsum Ceiling Board with compound. After prefill has set, embed Sheetrock Brand Joint Tape centered over joint. When compound has set, immediately apply fill coat. Apply compound over flanges of zinc control joints, corner beads, and metal trim. Spot fastener heads. After fill coat has set, apply finishing coat of compound. Completely cover all joints, angles, beads, control joints, and fasteners. After the compound has dried, apply one coat of a good-quality oil or latex exterior primer. Then follow with at least one coat of a good-quality latex exterior paint.

Laminating: Apply joint compound in the prescribed manner to back of face panels to be laminated. Laminate face panels to (base layer panels) (coreboard) using moderate pressure and temporary nailing or shoring to ensure adequate bond.

Limitations: Do not use setting-type joint compounds for thin skim coats. If setting-type joint compound dries before it sets, bond failure may result.