USG SHEETROCK Wall and Ceiling Spray Texture Sand Finish Texture 12 - Manual

Surface Substrate must be sound, dry, clean, and free of oil, grease, mildew, efflorescence, and other foreign materials
Preparation and/or contaminants. Product, air, and surface temperatures must be maintained at a minimum of 55 °F (13 °C)
throughout the finishing process when using joint compound, primer, and texture products.
New Drywall Treat joints and nailheads with an appropriate USG Joint Treatment System.
New Concrete/Plaster Age at least 60 days before texturing. Remove form oils and efflorescence and grind
down form lines. Fill cracks and holes, and level concrete surfaces with S HEETROCK ® Brand D URABOND ® Setting-Type
or E ASY S AND ™ Lightweight Setting-Type Joint Compound or C OVER C OAT ® Brand Compound and let dry.
Painted Surfaces Lightly sand to dull any sheen and develop “tooth” for good bond. Wash surface with a strong
detergent from the bottom up to remove any dust, dirt, or sheen. A strong solution of TSP (trisodiumphosphate)
works best. Follow manufacturer’s directions on the container.
Note: Texturing over previously painted, textured, or stained substrates may require application(s) of a stain-
blocking sealer to obtain uniform color (check manufacturer’s instructions for stain containment instructions).
Prevent rust stains by spot priming bare metal with a good rust-inhibitive primer and let dry prior to the full surface
priming.
Substrate Application of a prime coat is necessary to equalize surface porosity. After prepared surfaces have thoroughly
Priming dried, apply a prime coat of S HEETROCK ® Brand First Coat flat latex paint or a good quality interior latex flat wall paint
with high solids content. Prime coat should be applied undiluted and allowed to dry before decorating.
Mixing Place 1-1/2 gal. (5.7 L) of water per 25 lb. (11.3 kg) Texture 12 in suitable mixing container. Gradually add powder
to water. Stir thoroughly with mechanical mixer until completely mixed and lump-free. Soak mix for 15 min;
remix. Gradually add under agitation up to 1-1/4 gal. (4.8 L) of water to reach desirable spraying consistency.
Overthinning may result in poor adhesion, lack of hide, texture variation, and inability to compensate for base
suction variations. Do not exceed 2-3/4 gal. (10.5 L) total water per bag. Use within 24 hours.
Application Maintain minimum air, water, mix, and surface temperatures of 55 °F (13 °C) within working areas. Using suitable,
clean spray equipment, apply at a rate not to exceed 35 ft.
2 /lb. (7.2 m 2 /kg). Unless applied at the recommended
coverage rate, check-cracking from excessive thickness or poor hide from too thin a coating can occur. Allow to
dry overnight before applying another coat or before overpainting.
A full coverage application is recommended using a Binks Model 18D spray gun utilizing a #57 fluid nozzle with
a R-27 slotted fan cap, or a Binks Model 18 spray gun utilizing a #68 fluid nozzle with a #101 slotted fan cap, or
similar equipment. Adjust air pressure and material feed rate to compensate for hose length/diameter and consis-
tency of material to be sprayed.
The following spray equipment produces excellent results: Hackel Bros. (Milwaukee, Wisc.) Model 18 or 18D
special with #68 stainless-steel fluid nozzle, orifice size, 110; air nozzle #101 carbide; atomizing pressure
at gun 40-50 psi; air-hose size 3/8 in. i.d. with 3/8 in. swivel; fluid hose size 1/2 in. i.d. with 1/2 in. swivel;
control-hose size 3/16 in. with 1/4 in. swivel. Air-driven pump sizes: 4-1/2:1 ratio for hose lengths up to 125 ft.;
7-1/2:1 for lengths up to 200 ft.; 10:1 for lengths over 200 ft.
S
HEETROCK
®
Brand
Wall and Ceiling Spray Texture
Application Tips
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