ASTM D7377-08
(Practice)Standard Practice for Evaluating the Water Wash-Off Resistance of Traffic Paints
Standard Practice for Evaluating the Water Wash-Off Resistance of Traffic Paints
SIGNIFICANCE AND USE
After waterborne traffic paints are applied to a road pavement, it is important that they be sufficiently coalesced or cured so they will not be removed by rain. This practice can be used to determine the relative performance of binders and other components within traffic paint for their effect on the water-wash off resistance of the coating. Some key elements of the coating that may affect water-wash-off performance are the quality and type of latex binder, the dry time of the coating (often conducted by Test Method D 711), pigment volume concentration (PVC), and the relative water sensitivity of additives (for example, pigment dispersants, surfactants) in the coating.
SCOPE
1.1 A newly applied traffic paint film may be exposed to rain of varying intensities shortly after application. This practice was designed to determine the relative water wash-off resistance of an applied traffic paint film under controlled conditions. This test can be used to compare conventional and fast-dry traffic paints and the binders used in them for their relative ability to withstand rain soon after application on roadway surfaces.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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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Designation:D7377–08
Standard Practice for
1
Evaluating the Water Wash-Off Resistance of Traffic Paints
This standard is issued under the fixed designation D 7377; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 conventional waterborne traffıc paint, n—an aqueous
traffic paint that uses a conventional-dry latex binder.
1.1 Anewlyappliedtrafficpaintfilmmaybeexposedtorain
3.1.1.1 Discussion—Typical no-pick-up dry times for con-
of varying intensities shortly after application. This practice
ventional traffic paints are 20 to 45 min.
was designed to determine the relative water wash-off resis-
3.1.2 durable fast-dry waterborne traffıc paint, n—an aque-
tance of an applied traffic paint film under controlled condi-
ous traffic paint that uses a third generation durable fast-dry
tions. This test can be used to compare conventional and
latex binder.
fast-dry traffic paints and the binders used in them for their
3.1.2.1 Discussion—Air or airless spray application on
relative ability to withstand rain soon after application on
roadways is typically 0.65 mm (25 mils) wet or about 0.41 mm
roadway surfaces.
(16 mils) dry. The range of application for durable waterborne
1.2 The values stated in SI units are to be regarded as the
paints is 0.56 to 0.89 mm (22 to 35 mils) wet, but sometimes
standard. The values given in parentheses are for information
the durable paints are also striped at standard line thickness.
only.
3.1.3 effective water wash-off dry time, n—the traffic paint
1.3 This standard does not purport to address all of the
dry time required for no visible loss of coating when conduct-
safety concerns, if any, associated with its use. It is the
ing the water-wash off Standard Practice.
responsibility of the user of this standard to establish appro-
3.1.4 fast-dry waterborne traffıc paint, n—anaqueoustraffic
priate safety and health practices and determine the applica-
paint that uses a fast-dry traffic latex binder.
bility of regulatory limitations prior to use.
3.1.4.1 Discussion—Typical no-pick-up dry times for fast-
2. Referenced Documents
dry traffic paints are <10 min.
2
3.1.5 standard line fast-dry waterborne traffıc paint, n—an
2.1 ASTM Standards:
aqueous traffic paint that uses a first or second generation
D 562 Test Method for Consistency of Paints Measuring
fast-dry latex binder.
Krebs Unit (KU) Viscosity Using a Stormer-Type Viscom-
3.1.5.1 Discussion—Air or airless spray application on
eter
roadways is typically 0.38 mm (15 mils) wet or about .223 mm
D711 Test Method for No-Pick-Up Time of Traffic Paint
(9 mils) dry.
D 823 Practices for Producing Films of Uniform Thickness
3.1.6 waterborne traffıc paint, n—an aqueous traffic paint
of Paint, Varnish, and Related Products on Test Panels
(usually white or yellow) containing either a conventional or
D 1005 Test Method for Measurement of Dry-Film Thick-
fast-dry latex binder.
ness of Organic Coatings Using Micrometers
D 1212 Test Methods for Measurement of Wet Film Thick-
4. Summary of Practice
ness of Organic Coatings
4.1 This standard practice involves preparing a series of
D 4414 PracticeforMeasurementofWetFilmThicknessby
uniform thickness films of traffic paint on standard substrates.
Notch Gages
The films are allowed to dry over different time periods, and
3. Terminology then each paint film is subsequently tested with the water-
wash-off test to determine the relative amount of coating
3.1 Definitions:
remaining at the end of the wash off period.
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and 5. Significance and Use
Related Coatings, Materials, and Applications and is the direct responsibility of
5.1 After waterborne traffic paints are applied to a road
Subcommittee D01.44 on Traffic Coatings.
pavement, it is important that they be sufficiently coalesced or
Current edition approved Feb. 1, 2008. Published March 2008. Originally
approved in 2007. Last previous edition approved in 2007 as D 7377 - 07.
cured so they will not be removed by rain.This practice can be
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
usedtodeterminetherelativeperformanceofbindersandother
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
components within traffic paint for their effect on the water-
Standards volume information, refer to the standard’s Document Summary page on
wash off resistance of the coating. Some key elements of the
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D7377–07 Designation:D7377–08
Standard Practice for
1
Evaluating the Water Wash-Off Resistance of Traffic Paints
This standard is issued under the fixed designation D 7377; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 Anewly applied traffic paint film may be exposed to hard rain of varying intensities shortly after application. This practice
was designed to simulate that condition and covers determination of determine the relative water wash-off resistance of an applied
traffic paint film under controlled conditions. This test can be used to compare conventional and fast-dry traffic paints and the
binders used in them for their relative ability to withstand heavy rain soon after application on roadway surfaces.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 562Test Method for Consistency of Paints Measuring Krebs Unit (KU)Viscosity Using a Stormer-TypeViscometer Practice
for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
D 711Test Method for No-Pick-Up Time of Traffic Paint Practice for Conducting an Interlaboratory Study to Determine the
Precision of a Test Method
D 823Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels Practice for
Conducting an Interlaboratory Study to Determine the Precision of a Test Method
D 1005Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers Practice for Conducting
an Interlaboratory Study to Determine the Precision of a Test Method
D 1212Test Methods for Measurement of Wet Film Thickness of Organic Coatings Practice for Conducting an Interlaboratory
Study to Determine the Precision of a Test Method
D 4414Practice for Measurement of Wet Film Thickness by Notch Gages Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
3. Terminology
3.1 Definitions:
3.1.1 conventional waterborne traffıc paint, n—an aqueous traffic paint that uses a conventional-dry latex binder.
3.1.1.1 Discussion—Typical no-pick-up dry times for conventional traffic paints are 20 to 45 min.
3.1.2 durable fast-dry waterborne traffıc paint, n—an aqueous traffic paint that uses a third generation durable fast-dry latex
binder.
3.1.2.1 Discussion—Airorairlesssprayapplicationonroadwaysistypically0.65mm(25mils)wetorabout0.41mm(16mils)
dry.Therangeofapplicationfordurablewaterbornepaintsis0.56to0.89mm(22to35mils)wet,butsometimesthedurablepaints
are also striped at standard line thickness.
3.1.3 effective water wash-off dry time, n— the traffic paint dry time required for no visible loss of coating when conducting
the water-wash off Standard Practice.
3.1.4 fast-dry waterborne traffıc paint, n— an aqueous traffic paint that uses a fast-dry traffic latex binder.
3.1.4.1 Discussion—Typical no-pick-up dry times for fast-dry traffic paints are <10 min.
3.1.5 standard line fast-dry waterborne traffıc paint, n—an aqueous traffic paint that uses a first or second generation fast-dry
latex binder.
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.44 on Traffic Coatings.
Current edition approved July 1, 2007. Published August 2007.
Current edition approved Feb. 1, 2008. Published March 2008. Originally approved in 2007. Last previous edition approved in 2007 as D 7377 - 07.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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D7377–08
3.1.5.1 Discussion—Air or airless spray
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