REDWOOD GS is a spray-dried pigment from a manganese enriched form of goethite, a naturally occurring inorganic iron oxide. REDWOOD GS is used primarily to color cement products, roofing granules, and clay brick. It is lightfast, insoluble in water, resistant to alkalis and weak acids and non-reactive with solvents, oils and most resins.

1. SRC-08-28-2
Rev. Date: 08/26/2011
Approved By:
PRODUCT BULLETIN
REDWOOD GS
WARRANTY DISCLAIMER
The facts stated and recommended regarding NRO products are based on our own research and the research of others, and are
believed to be accurate. NRO products are sold without WARRANTY, expressed or implied, and on the condition that the
purchasers conduct their own tests in order to determine the suitability of such for their particular purpose. The user is solely
responsible for the use and information regarding NRO products. NRO disclaims any warranty of merchantability or fitness of
this product for any particular purpose.
New Riverside Ochre Company, Inc. • 75 Old River Road, S.E. • PO Box 460 • Cartersville, GA 30120
Phone (770) 382-4568 • 1-800-248-0176 • Fax (770) 387-1658
www.nroonline.com
REDWOOD GS is a spray-dried pigment from a manganese enriched form of goethite, a naturally
occurring inorganic iron oxide. REDWOOD GS is used primarily to color cement products, roofing
granules, and clay brick. It is lightfast, insoluble in water, resistant to alkalis and weak acids and
non-reactive with solvents, oils and most resins.
Redwood GS is a lower cost, primary brown that can be used to shift synthetics into unique,
natural shades.
TYPICAL PROPERTIES
Color Umber
Fe2O3% 72 ± 5
SiO2% 17 ± 2
MnO2% 6 ± 2
Moisture % < 3
Loss on Ignition / % Approximate < 2
Bulk Density – loose / lbs. per ft.3
65
Specific Gravity (absolute) 4.0
Average Particle Size (microns) < 3