620.13 Guidelines for Using Water-Borne Traffic Paint - Revision history

Hoskir: Renamed, renumbered article due to MUTCD updates (See Special Ballot)

2026-01-06T16:24:54Z

Renamed, renumbered article due to MUTCD updates (See Special Ballot)

Hoskir: Hoskir moved page 620.11 Guidelines for Using Water-Borne Traffic Paint to 620.13 Guidelines for Using Water-Borne Traffic Paint: renumbered and renamed due to MUTCD Update (See Special Ballot)

2026-01-06T16:23:55Z

Hoskir moved page 620.11 Guidelines for Using Water-Borne Traffic Paint to 620.13 Guidelines for Using Water-Borne Traffic Paint: renumbered and renamed due to MUTCD Update (See Special Ballot)

← Older revision	Revision as of 11:23, 6 January 2026
(No difference)

Smithk: Per TS, minor clarifications

2020-09-08T15:39:47Z

Per TS, minor clarifications

EPGsysop at 18:41, 29 June 2017

2017-06-29T18:41:58Z

← Older revision		Revision as of 13:41, 29 June 2017
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	'''Guidance.''' Care should be taken to minimize the infiltration of rainwater into these systems to reduce the volume of material.		'''Guidance.''' Care should be taken to minimize the infiltration of rainwater into these systems to reduce the volume of material.

	'''Option.''' If discharging into a city sewer system becomes a problem, arrangements can be made for other disposal of wash water. If this happens contact the Traffic Division for further assistance.		'''Option.''' If discharging into a city sewer system becomes a problem, arrangements can be made for other disposal of wash water. If this happens contact the Highway Safety and Traffic Division for further assistance.

	[[Category:620 Pavement Marking\|620.11]]		[[Category:620 Pavement Marking\|620.11]]

Smithk: Per TS, eliminated Mem’l Day striping goal, use of double dropped wet reflective elements, & grooving on constr’n project if a durable pavem’t marking product is not being used.

2015-02-25T18:37:57Z

Per TS, eliminated Mem’l Day striping goal, use of double dropped wet reflective elements, & grooving on constr’n project if a durable pavem’t marking product is not being used.

← Older revision		Revision as of 13:37, 25 February 2015
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	==620.11.1 General==		==620.11.1 General==
	~~{\|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#ffddcc" width="210px" align="right"~~
	\|-
	~~\|'''Traffic Paint and Beads'''~~
	\|-
	~~\|[http://library.modot.mo.gov/RDT/reports/Pd01021/or06011.pdf Report 2005]~~
	\|-
	~~\|'''See also:''' [http://www.modot.gov/services/OR/byDate.htm Innovation Library]~~
	\|}
	'''Support.''' Special care must be taken when using water-borne (sometimes referred to as water based) paint in your equipment.		'''Support.''' Special care must be taken when using water-borne (sometimes referred to as water based) paint in your equipment.

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	==620.11.11 Application Temperatures and Dry Times==		==620.11.11 Application Temperatures and Dry Times==

	'''Support.''' Water-borne traffic paints cure by a two-stage process. In the first stage, the water evaporates and the acrylic emulsion coalesces. This evaporation is dependent on temperature and humidity. Low temperature and high humidity gives longer dry times. In the second stage, the acrylic polymer cross-links to provide a durable film. This reaction is dependent on the temperature. ~~50°~~ Fahrenheit is the recommended minimum application temperature. Below ~~50°~~ Fahrenheit, the polymer will cross-link (down to ~~35°~~ Fahrenheit) but the durability of the film will be severely reduced, i.e. 2 to 3 months instead of 9 to 12 months.		'''Support.''' Water-borne traffic paints, both normal and high-build, cure by a two-stage process. In the first stage, the water evaporates and the acrylic emulsion coalesces. This evaporation is dependent on temperature and humidity. Low temperature and high humidity gives longer dry times. In the second stage, the acrylic polymer cross-links to provide a durable film. This reaction is dependent on the air and surface temperature. 50° Fahrenheit is the recommended minimum application temperature on minor roads. Below 50° Fahrenheit, the polymer will cross-link (down to 35° Fahrenheit) but the durability of the film will be severely reduced, i.e. 2 to 3 months instead of 9 to 12 months. On major roads, the recommended minimum application temperature is 60° Fahrenheit.
			Cold weather paint traffic paint is also dependent on the air and surface temperature. However, due to the formulation of the paint, it is capable of being applied at air and surface temperatures of 35° (and climbing).

	Dry times are dependent on temperature and humidity. Under conditions of 75° Fahrenheit, sunny and light wind, this material will dry to no-track in less than two minutes.		Dry times are dependent on temperature and humidity. Under conditions of 75° Fahrenheit, sunny and light wind, this material will dry to no-track in less than two minutes.
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	:B. Lines need an hour to dry before any rain. If it looks threatening, don't chance it. You may have to repaint.		:B. Lines need an hour to dry before any rain. If it looks threatening, don't chance it. You may have to repaint.
	:C. If it does rain a significant amount, wait until the next day before trying again.		:C. If it does rain a significant amount, wait until the next day before trying again.
			:D. Salt and other deicing chemicals need to be washed off prior to applying water-borne traffic paints. Additional time is typically needed to remove all the chemicals from the rumble strips.

	==620.11.13 ~~Application Rates==~~		==620.11.13 Material Temperatures==

	'''Support.''' Application rates for water-borne traffic paints are 20 mils (excluding beads) and 10 pounds of beads per gallon. Thick paint applications adversely effect drying time. Thin applications adversely affect durability.

	~~==620.11.14~~ Material Temperatures==

	'''Option.''' For best results, water-borne paints may be heated to 100° F + 10° F.		'''Option.''' For best results, water-borne paints may be heated to 100° F + 10° F.
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	'''Standard.''' The paint system shall not exceed 160° F anywhere.		'''Standard.''' The paint system shall not exceed 160° F anywhere.

	==620.11.15 Existing Markings==		==620.11.14 Existing Markings==

	'''Support.''' Water-borne paints have not exhibited problems when applied over old markings.		'''Support.''' Water-borne paints have not exhibited problems when applied over old markings.

	==620.11.16 Wash Water==		==620.11.15 Wash Water==

	'''Support.''' As discussed above in [[#620.11.7 Hazardous Waste\|Hazardous Waste]], the water-borne paint used by MoDOT is itself not considered a hazardous material. However, any paint or water that is colored by paint can be an environmental concern. Care must be taken to assure that any spilled paint or paint wash water does not flow off the surface of any MoDOT property.		'''Support.''' As discussed above in [[#620.11.7 Hazardous Waste\|Hazardous Waste]], the water-borne paint used by MoDOT is itself not considered a hazardous material. However, any paint or water that is colored by paint can be an environmental concern. Care must be taken to assure that any spilled paint or paint wash water does not flow off the surface of any MoDOT property.

Smithk: Per Traffic, revision to bring policy into substantial compliance with the 2009 MUTCD.

2012-01-18T19:49:45Z

Per Traffic, revision to bring policy into substantial compliance with the 2009 MUTCD.

Show changes

Smithk: 620.9 Guidelines for Using Water-Borne Traffic Paint moved to 620.11 Guidelines for Using Water-Borne Traffic Paint: Per Traffic, revision to bring policy into substantial compliance with the 2009 MUTCD.

2012-01-18T19:46:33Z

620.9 Guidelines for Using Water-Borne Traffic Paint moved to 620.11 Guidelines for Using Water-Borne Traffic Paint: Per Traffic, revision to bring policy into substantial compliance with the 2009 MUTCD.

← Older revision	Revision as of 14:46, 18 January 2012
(No difference)

Smithk: /* 620.9.3 Daily Maintenance */ removed metric value, per TR

2010-04-12T19:34:00Z

620.9.3 Daily Maintenance: removed metric value, per TR

← Older revision		Revision as of 14:34, 12 April 2010
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	'''Standard.''' The tanks shall not be run dry. An empty tank allows air into the system causing a "tree ring effect" and, after this happens several times, the system shall be completely torn down and cleaned. After each daily use, gun shrouds and fan atomizing assemblies from paint guns shall be removed, and cleaned with water and a soft brush. The fluid tip of the guns shall be cleaned with a wet rag or brush.		'''Standard.''' The tanks shall not be run dry. An empty tank allows air into the system causing a "tree ring effect" and, after this happens several times, the system shall be completely torn down and cleaned. After each daily use, gun shrouds and fan atomizing assemblies from paint guns shall be removed, and cleaned with water and a soft brush. The fluid tip of the guns shall be cleaned with a wet rag or brush.

	For overnight storage, the paint tanks shall be completely filled with paint. If it is necessary to prevent paint surface drying (skins) by pouring some water (1 pint ~~(0.47 l)~~) on top of the paint after the truck has been parked, the amount added shall not exceed that small amount because more water will change the paint formulation and affect drying time and durability.		For overnight storage, the paint tanks shall be completely filled with paint. If it is necessary to prevent paint surface drying (skins) by pouring some water (1 pint) on top of the paint after the truck has been parked, the amount added shall not exceed that small amount because more water will change the paint formulation and affect drying time and durability.

	Water shall be injected into heat exchangers only during cleaning, this is important. Exchangers shall be left full of paint. It is necessary to turn off glycol to the heat exchanger prior to daily shutdown to allow paint to cool in the exchanger.		Water shall be injected into heat exchangers only during cleaning, this is important. Exchangers shall be left full of paint. It is necessary to turn off glycol to the heat exchanger prior to daily shutdown to allow paint to cool in the exchanger.

EPG-Admin: Added Links to Innovation Library.

2009-04-06T17:25:45Z

Added Links to Innovation Library.

← Older revision		Revision as of 12:25, 6 April 2009
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	==620.9.1 General==		==620.9.1 General==
			{\|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#ffddcc" width="210px" align="right"
			\|-
			\|'''Traffic Paint and Beads'''
			\|-
			\|[http://library.modot.mo.gov/RDT/reports/Pd01021/or06011.pdf Report 2005]
			\|-
			\|'''See also:''' [http://www.modot.gov/services/OR/byDate.htm Innovation Library]
			\|}
	'''Support.''' Special care must be taken when using water borne (sometimes referred to as water based) paint in your equipment.		'''Support.''' Special care must be taken when using water borne (sometimes referred to as water based) paint in your equipment.

EPG-Admin at 18:40, 8 June 2007

2007-06-08T18:40:14Z

← Older revision		Revision as of 13:40, 8 June 2007
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			[[image:620.9 Striping Trucks.JPG\|right\|450 px]]

	==620.9.1 General==		==620.9.1 General==

← Older revision		Revision as of 10:39, 8 September 2020
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	Thermostats on the bulk storage tanks should heat the paint from 40° F to 50° F with a safety device to prevent paint from being heated beyond this temperature range.		Thermostats on the bulk storage tanks should heat the paint from 40° F to 50° F with a safety device to prevent paint from being heated beyond this temperature range.

	'''Standard.''' The manufacturer's maximum paint temperature of ~~160~~° F shall not be exceeded. Brass and copper will cause a chemical reaction with the heated water-borne paint. All heat exchangers and ball valves shall be stainless steel.		'''Standard.''' The manufacturer's maximum paint temperature of 120° F shall not be exceeded. Brass and copper will cause a chemical reaction with the heated water-borne paint. All heat exchangers and ball valves shall be stainless steel.

	==620.11.3 Daily Maintenance==		==620.11.3 Daily Maintenance==

	'''~~Standard~~.''' The tanks ~~shall~~ not be run dry. An empty tank allows air into the system causing a "tree ring effect" and, after this happens several times, the system ~~shall~~ be completely torn down and cleaned. After each daily use, gun shrouds and ~~fan atomizing assemblies~~ from paint guns ~~shall be removed,~~ and cleaned with water and a soft brush. The fluid tip of the guns ~~shall~~ be cleaned with a wet rag or brush.		'''Guidance.''' The tanks should not be run dry. An empty tank allows air into the system causing a "tree ring effect" and, after this happens several times, the system should be completely torn down and cleaned. After each daily use, gun shrouds and spray tips should be removed from paint guns and cleaned with water and a soft brush. The fluid tip of the guns should be cleaned with a wet rag or brush.

	For overnight storage, the paint tanks shall be completely filled with paint. If it is necessary to prevent paint surface drying (skins) by pouring some water (1 pint) on top of the paint after the truck has been parked, the amount added shall not exceed that small amount because more water will change the paint formulation and affect drying time and durability.		For overnight storage, the paint tanks shall be completely filled with paint. If it is necessary to prevent paint surface drying (skins) by pouring some water (1 pint) on top of the paint after the truck has been parked, the amount added shall not exceed that small amount because more water will change the paint formulation and affect drying time and durability.
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	Water shall be injected into heat exchangers only during cleaning, this is important. Exchangers shall be left full of paint. It is necessary to turn off glycol to the heat exchanger prior to daily shutdown to allow paint to cool in the exchanger.		Water shall be injected into heat exchangers only during cleaning, this is important. Exchangers shall be left full of paint. It is necessary to turn off glycol to the heat exchanger prior to daily shutdown to allow paint to cool in the exchanger.

	~~'''Guidance.''' You should check~~ for skins on paint in tanks before starting each day.		Check for skins on paint in tanks before starting each day.

	==620.11.4 Weekly Maintenance==		==620.11.4 Weekly Maintenance==

	'''~~Standard~~.''' Water ~~shall~~ be flushed through the heated hoses and out of the paint guns for weekend storage. The strainer ~~shall~~ be cleaned at discharge of heat exchangers.		'''Guidance.''' Water should be flushed through the heated hoses and out of the paint guns for weekend storage. The strainer should be cleaned at discharge of heat exchangers.

	==620.11.5 Periodic Cleaning==		==620.11.5 Periodic Cleaning==

	'''~~Standard~~.''' The paint strainer ~~shall~~ be removed at discharge of paint tank, cleaned and replaced, and filled with paint to remove trapped air after flushing entire system with water. Also, the heat exchanger ~~shall~~ be cleaned at this time.		'''Guidance.''' The paint strainer should be removed at discharge of paint tank, cleaned and replaced, and filled with paint to remove trapped air after flushing entire system with water. Also, the heat exchanger should be cleaned at this time.

	~~'''Guidance.'''~~ This should be done every two weeks of operation, or more often if needed.		This should be done every two weeks of operation, or more often if needed.

	==620.11.6 End of Season Cleaning==		==620.11.6 End of Season Cleaning==
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	The exchanger should be pressure tested (100 psi) for damaged tubes. Any tubes that leak air should be silver soldered shut at both ends.		The exchanger should be pressure tested (100 psi) for damaged tubes. Any tubes that leak air should be silver soldered shut at both ends.

	~~If possible, the bulk storage tanks should be emptied with no winter carry-over of paint. The entire system should be flushed with water and the entire paint residue scraped off, if necessary.~~

	==620.11.7 Hazardous Waste==		==620.11.7 Hazardous Waste==
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	==620.11.8 Flammability==		==620.11.8 Flammability==

	'''Support.''' Water-borne paints used by the Missouri Department of Transportation are not flammable. Therefore, sprinklers are not required for inside storage, nor do we need warning plaques on the striper.		'''Support.''' Water-borne paints used by the Missouri Department of Transportation are not flammable. Therefore, sprinklers are not required for inside storage facilities, nor do we need warning plaques on the striper or bulk tank facilities.

	==620.11.9 Storage==		==620.11.9 Storage==

	'''Support.''' The shelf life of currently approved material is nine months. Water-borne paint consists of acrylic ~~vehicle~~ suspended in a water emulsion. As a result, the materials can freeze in cold weather. When the paint looks like cottage cheese, it is out of condition. If water-borne paints go out of condition, it is not recoverable.		'''Support.''' The shelf life of currently approved material is nine months. Water-borne paint consists of acrylic binders suspended in a water emulsion. As a result, the materials can freeze in cold weather. When the paint looks like cottage cheese, it is out of condition. If water-borne paints go out of condition, it is not recoverable.

	'''Standard.''' Materials shall be stored where they will not freeze (40 degrees Fahrenheit maintained). If the paint freezes, it is not usable or recoverable and shall be disposed of properly.		'''Standard.''' Materials shall be stored where they will not freeze (40 degrees Fahrenheit maintained). If the paint freezes, it is not usable or recoverable and shall be disposed of properly.
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	==620.11.10 Cleaning Solvents==		==620.11.10 Cleaning Solvents==

	'''Support.''' When wet, water-borne paints can be cleaned with plain water; therefore, the main cleanup solvent is clean water. When the paint is too dry for water to work, general household cleaners ~~such as "Fantastic"~~ can be used.		'''Support.''' When wet, water-borne paints can be cleaned with plain water; therefore, the main cleanup solvent is clean water. When the paint is too dry for water to work, general household cleaners can be used.

	==620.11.11 Application Temperatures and Dry Times==		==620.11.11 Application Temperatures and Dry Times==

	'''Support.''' Water-borne traffic paints, both normal and high-build, cure by a two-stage process. In the first stage, the water evaporates and the acrylic emulsion coalesces. This evaporation is dependent on temperature and humidity. Low temperature and high humidity ~~gives~~ longer dry times. In the second stage, the acrylic polymer cross-links to provide a durable film. This reaction is dependent on the air and surface temperature. 50° Fahrenheit is the recommended minimum application temperature on minor roads. Below 50° Fahrenheit, the polymer will cross-link (down to 35° Fahrenheit) but the durability of the film will be severely reduced, i.e. 2 to 3 months instead of 9 to 12 months. On major roads, the recommended minimum application temperature is 60° Fahrenheit.		'''Support.''' Water-borne traffic paints, both normal and high-build, cure by a two-stage process. In the first stage, the water evaporates and the acrylic emulsion coalesces. This evaporation is dependent on temperature and humidity. Low temperature and high humidity result in longer dry times. In the second stage, the acrylic polymer cross-links to provide a durable film. This reaction is dependent on the air and surface temperature. 50° Fahrenheit is the recommended minimum application temperature on minor roads. Below 50° Fahrenheit, the polymer will cross-link (down to 35° Fahrenheit) but the durability of the film will be severely reduced, i.e. 2 to 3 months instead of 9 to 12 months. On major roads, the recommended minimum application temperature is 60° Fahrenheit.
	Cold weather ~~paint~~ traffic paint is also dependent on the air and surface temperature. However, due to the formulation of the paint, it is capable of being applied at air and surface temperatures of 35° (and climbing).
			Cold weather traffic paint is also dependent on the air and surface temperature. However, due to the formulation of the paint, it is capable of being applied at air and surface temperatures of 35° (and climbing).

	Dry times are dependent on temperature and humidity. Under conditions of 75° Fahrenheit, sunny and light wind, this material will dry to no-track in less than two minutes.		Dry times are dependent on temperature and humidity. Under conditions of 75° Fahrenheit, sunny and light wind, this material will dry to no-track in less than two minutes.
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	==620.11.13 Material Temperatures==		==620.11.13 Material Temperatures==

	'''Option.''' For best results, water-borne paints may be heated to ~~100°~~ F ~~+ 10°~~ F.		'''Option.''' For best results, water-borne paints may be heated to 100° F ± 10° F .

	'''Support.''' Viscosity is very dependent on material temperatures as is ease of spraying. Excess temperatures will ~~jell~~ the paint with disastrous results; you might have to replace the heat exchangers.		'''Support.''' Viscosity is very dependent on material temperatures as is ease of spraying. Excess temperatures will gel the paint with disastrous results; you might have to replace the heat exchangers.

	'''Standard.''' The paint system shall not exceed ~~160°~~ F ~~anywhere~~.		'''Standard.''' The temperature of the paint system shall not exceed 120° F.

	==620.11.14 Existing Markings==		==620.11.14 Existing Markings==
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	'''Guidance.''' Care should be taken to minimize the infiltration of rainwater into these systems to reduce the volume of material.		'''Guidance.''' Care should be taken to minimize the infiltration of rainwater into these systems to reduce the volume of material.

	'''Option.''' If discharging into a city sewer system becomes a problem, arrangements can be made for other disposal of wash water. If this happens contact the Highway Safety and Traffic Division for further assistance.		'''Option.''' If discharging into a city sewer system becomes a problem, arrangements can be made for other disposal of wash water, such as storage in a septic system to allow solids to settle before draining into the city sewer system or retained into a holding take to be removed later by a waste disposal contractor. If this happens contact the Highway Safety and Traffic Division for further assistance.



	[[Category:620 Pavement Marking\|620.11]]		[[Category:620 Pavement Marking\|620.11]]