USG Sheetrock Primers - Manual

Surface Preparation Surfaces must be dry, clean, sound and free of oil, grease and efflorescence. Glossy surfaces must be dulled.
Prime metal with a good rust-inhibitive primer. Fill or level concrete with S
HEETROCK brand D URABOND ® setting-type
joint compound, Sheetrock brand Easy Sand ™ lightweight setting-type joint compound or C OVER C OAT ® compound.
Treat drywall joints and nailheads with a U.S. Gypsum Company joint treatment system.
Mixing Stir gently. Do not thin for brush or roller application. For spray application, if necessary, add water in half-pint
increments up to a maximum 1 qt. of water per gallon.
Note: Overthinning may cause poor adhesion, lack of hide and unequal suction when dry. May be tinted.
Adding to wall and If slightly better spray properties, wet hide, improved bond, whiteness and surface hardness are desired,
ceiling textures S HEETROCK brand First Coat and S HEETROCK brand wallcovering primer may be added to wet-mixed USG ceiling
and wall texture products at a rate of up to 1 gal. per 30, 32, 40 and 50 lb. bag of texture. Reduce water
quantity to account for addition of S
HEETROCK primer on 1:1 replacement basis. Surface priming recommendations
on texture bag still apply.
Application Apply a full coverage coat. Material dries to touch in under 30 min. in 75 °F/50% R.H. conditions. Maintain
minimum air, product mix and surface temperature of 55 °F (13 °C) during application and until surface is dry.
Brush, roller, or airless or conventional spraygun may be used. If surface is not ideal, backrolling of airless spray
applications may be beneficial.
Brush Use a high quality, professional paint brush.
Roller For best results, use a high quality roller with 1/8 to 1/4 nap on smooth and semi-smooth surfaces. For any
surface, maximum nap length should not exceed 1/2.
Airless As a general guideline, use professional equipment that meets or exceeds the following when spraying through
spray gun 50 ft. of 1/4 i.d. airless spray hose: output of at least 3/4 gal. per minute; pressure of at least 2,700 psi; spray tip
of 0.021 at 2,000 psi. Examples of appropriate equipment include Graco ULTRA 1500, 1000 and 750 models and
the Wagner 9190 sprayer, with a suitable spray gun that will accommodate an RAC IV 521 (0.021) tip, and RAC IV
Dripless Guard and a 30 mesh filter.
Conventional Use Binks model 2001 gun, pressurized external, with 565 fluid needle, 66 fluid nozzle and 65 PR air nozzle; or
spray gun Binks model 18, pressurized internal, with 68 fluid needle, 68 fluid nozzle and 206 air nozzle; or similar equip-
ment. Air hose is typically 3/8 i.d. with 1/2 fluid hose i.d.
Note: Adjust pressure and material feed rate so a full coverage coat can be achieved by overlapping preceding
application with 1/4 to 1/2 of fan width at a distance of 18 from surface. Pressure and material feed rates will vary
with hose diameter, height or distance pumped, and paint consistency. S
HEETROCK primers contain a high level
of select pigments and fillers like conventional latex flat paints. When these paints are used in spray equipment
previously used to spray PVA sealers with high levels of resin, clogging at the spray gun tip may result. The use
of clean or new hoses is recommended to avoid this problem when spraying S
HEETROCK
primers.
Cleanup Clean equipment with warm, soapy water.
Sheetrock
®
Primers
Application Tips
First Coat
Wallcovering Primer
Page 1 of 2