USG SHEETROCK Setting-Type Joint Compounds DURABOND - Manual (Page 2)

Use with S HEETROCK In areas to be tiled, for tapered edge joints, embed S HEETROCK Brand Joint Tape with S HEETROCK Brand D URABOND
Brand Gypsum Panels, Setting-Type Joint Compound (45 or 90). When set, apply a fill coat of D URABOND 45 or 90. Take care not to
Water-Resistant crown the joint. Wipe excess joint compound from the panel surface before it sets. For butt joints and interior
angles, embed S
HEETROCK Brand Joint Tape with D URABOND 45 or 90. A fill coat is not necessary. Again, take care
not to crown the joint. For fasteners, spot fastener heads at least once with D URABOND 45 or 90.
Fill and seal all openings around pipes, fittings, and fixtures with a thinned-down coat of tile adhesive. For best
results, use Type I Ceramic Tile Adhesive that meets ANSI A136.1 both as a sealer and to set the tile. With a
1
Љ brush, apply the thinned compound onto the raw gypsum panel core at cutouts, and allow area to dry
thoroughly prior to application of tile. Before compound dries, wipe excess material from the surface of gypsum
panels. For areas not to be tiled, embed tape with D
URABOND 45 or 90 in the conventional manner. Finish with at
least two coats of a S HEETROCK Brand Joint Compound to provide joint finishing for painting and wallpapering.
Laminating Apply S HEETROCK Brand Setting-Type 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.
Repairing Handball Repair surface-damaged areas (gouges, scratches, surface imperfections) in handball and racquetball court
and Racquetball walls and other interior wall and ceiling surfaces finished with U.S. Gypsum S TRUCTO -B ASE ® and S TRUCTO -G AUGE ®
Court Walls Gypsum Plasters as follows. Clean surface of dust, residue, and other contaminants. Prepare D URABOND 45 or 90
by mixing into a solution of 1 part water and 1 part USG A CRI -A DD ™ 100% Acrylic Add-Mix Fortifier. Use prepared
mixture to refinish surface damage. Initial application over deep areas should be set and partially dry prior to
application of subsequent coats. Finish to a smooth surface. This same procedure may be used in repair of
surface-damaged areas of S
TRUCTOCORE ® Security Wall Systems constructed using S TRUCTO -B ASE Gypsum Plaster
and I MPERIAL ® Finish Plaster per publication SA1119.
Finishing For painting and decorating, follow manufacturer’s directions for materials used.
Use With USG USG Gypsum Accelerator (High Strength) when added to S HEETROCK Brand Setting Type Joint Compound
Gypsum (D URABOND ) will shorten the setting time. USG Gypsum Accelerator should be sprinkled in dry form into the mixed
Accelerator compound. For hand mixing, dry accelerator can be added either to the dry mix or mixed compound. Never add
USG Gypsum Accelerator directly to water or mix it with water to form a solution before adding it to the compound.
Doing so will significantly reduce its ability to accelerate the set.
Accelerator Amount Approximate Set Time (minutes)
Tablespoon Tablespoon D URABOND 90 D URABOND 45 D URABOND 20
Per Bag Per Bread Pan
1.0 0.22 40 20 10
2.0 0.44 30 10
6.0 1.33 20
– “Bread Pan” volume estimated at 10 cups (80 oz.)
– Wet Mixed Volume of Setting Type Joint Compounds approx. 2.8 gallons (45 cups) per bag.
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