ASTM D6904-03(2007)
(Practice)Standard Practice for Resistance to Wind-Driven Rain for Exterior Coatings Applied on Masonry
Standard Practice for Resistance to Wind-Driven Rain for Exterior Coatings Applied on Masonry
SCOPE
1.1 This practice is for the evaluation of the ability of coatings to resist the passage of water through masonry block when exposed to water spray and air pressure.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6904 − 03 (Reapproved 2007)
StandardPractice for
Resistance to Wind-Driven Rain for Exterior Coatings
Applied on Masonry
This standard is issued under the fixed designation D6904; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope apparatus and exposed for 24 h to continuous water spray and
air pressure or as agreed upon between manufacturer and
1.1 This practice is for the evaluation of the ability of
supplier. Upon completion of the exposure, the blocks are
coatings to resist the passage of water through masonry block
removed, evaluated for visible water leaks or weight gain, or
when exposed to water spray and air pressure.
both.
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
4. Significance and Use
conversions to SI units that are provided for information only
4.1 Thispracticeismeanttosimulatetheabilityofacoating
and are not considered standard.
system applied to a masonry block to withstand exposure to
1.3 This standard does not purport to address all of the
continuous water spray (rain) and a dynamic pressure equiva-
safety concerns, if any, associated with its use. It is the
lent to a 98 mph wind velocity without exhibiting water leaks
responsibility of the user of this standard to establish appro-
or weight gain, or both.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 5. Apparatus
5.1 The testing box is assembled from transparent plastic
2. Referenced Documents
panels ⁄2-in. thick and typically of the dimensions as shown in
2.1 ASTM Standards:
Fig. 1. Three openings on the side, 6 by 12 in., are provided so
D1475 Test Method For Density of Liquid Coatings, Inks,
that the coated side of the three blocks may be positioned for
and Related Products
test. The openings on the top of the apparatus for the air inlet
D3924 Specification for Environment for Conditioning and
and manometer connection shall not be less than 3 in. apart to
Testing Paint, Varnish, Lacquer, and Related Materials
make certain that air inlet turbulence will not effect the
D3925 Practice for Sampling Liquid Paints and Related
manometer readings. A spray tube shall be constructed from
Pigmented Coatings 1
⁄2-in. plastic tubing with three fish-tail nozzles. Attachment to
2.2 Federal Standard:
the testing box includes a water-filled U-tube manometer,
TT-C-555B Coating, Textured (For Interior and Exterior
source of compressed air, clamps and angle irons for securely
Masonry Surfaces)
fastening the test panels to the box, and a drain outlet. Also,
illustrated is a simple air pressure regulator consisting of a
3. Summary of Practice
T-tube with the leg (foot) of the tube placed in a water filled
3.1 Typically 8 by 16 by 2 in. masonry blocks are coated
beakeratadepthofslightlygreaterthan5in.Thissetupisalso
with block filler and then coated with the masonry paint and
a safety device. Any sudden increase in air pressure will be
allowed to cure. The coated blocks are then secured to a test
vented harmlessly. The apparatus outlined above was derived
from that shown in Federal Specification TT-C-555B. Appara-
1 tus and substrates of other dimensions can be used as agreed
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
Related Coatings, Materials, and Applications and is the direct responsibility of upon between manufacturer and supplier. The duration of
Subcommittee D01.47 on Concrete, Stone and Masonry Treatments.
exposure and water pressure used will also be agreed upon
Current edition approved Nov. 1, 2007. Published November 2007. Originally
between manufacturer and user.
approved in 2003. Last previous edition approved in 2003 as D6904 - 03. DOI:
10.1520/D6904-03R07.
6. Reagents and Materials
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 Three 8 by 16 by 2 in. Patio Blocks.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:// Federal Specification TT-C-555B, Amendment No. 1, dated August 5, 1975,
www.access.gpo.gov. U.S. Government Printing Office.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6904 − 03 (Reapproved 2007)
FIG. 1 Dimensions of Test Box
6.2 Stiff Bristle Brush. a scrub brush for this application to assure that all the voids in
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