NOBURST®

NOBURST Antifreeze & Heat Transfer Fluid

Factory Pre-mixed Freeze Protection for Water-based Heating and Cooling Systems

NOBURST non-toxicQ antifreeze solutions are to be used in place of water and other water-like ﬂuids
in systems where freezing may either cause damage or interfere with the functioning of systems or
equipment and/or toxicity to humans or animals is a concern.1

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NOBURST ANTIFREEZE AND
HEAT TRANSFER FLUIDNOBURST non-toxic antifreeze solutions are factory
pre-mixed freeze protection for water-based heating
and cooling systems to be used in place of water andother water-like ﬂuids in systems where freezing may
either cause damage or interfere with the functioningof systems or equipment, and/or toxicity to humans or
animals is a concern.
NOBURST family of products consists of ALL-NEW
NOBURST RTU40 40% PG, RTU35 35% PG, and
RTU30 30% PG, plus NOBURST -100, SuperNOBURST, NOBURST HD, andNOBURST AL.

2

AVAILABLE SIZES• 5-gallon pails• 30-gallon drums• 55-gallon drums• 275 or 330-gallon totes• 5,000-gallon tank truck

AVAILABILITY
Noburst Ready to Use mixes are available throughout
the U.S. through wholesale distributors. Please contact
Noble Company for your local representative andwholesaler.

CUSTOM BLENDS
Custom formulations are available for lower
concentrations of glycerine.Please contact Noble
Company for more information.

INGREDIENTS
Active: Propylene Glycol and Dipotassium Phosphate
Other: Viscosity Reduction Agent, Food-Grade Dye,
Deionized Water

NEW! NOBURST READY TO USE
Water quality concerns are no longer limited to our drinking water. Whether it’s well or municipal water with high total
hardness, boiler equipment manufacturers are now more cautious than ever. When mixing propylene glycol on-site, poor
water quality can lead to long-term damage to heating systems. Noble Company is addressing those concerns and ispleased to introduce a new line of ready-to-use antifreeze that eliminates these water quality concerns.
Designed to be introduced directly into systems with no on-site dilution, NOBURST RTU products are factory premixed
with deionized water ensuring no mineral content or hardness levels and the elimination of chlorides, which are second
only to oxygen as a leading cause of heating system corrosion. NOBURST RTU blends are available in 30, 35, and 40%
propylene glycol concentrations with no minimum order quantity. DO NOT DILUTE.

NOBURST® RTU40 40% PG

NOBURST® RTU 35 35% PG

Boiling Point

103.9

Boiling Point

102.8

Viscosity @ 160˚ F

1.04

Viscosity @ 160˚ F

0.93

Specific Gravity @ 72˚ F

1.027

Specific Gravity @ 72˚ F

1.024

Thermal Conductivity @ 160˚ F

0.24

Thermal Conductivity @ 160˚ F

0.255

0.925

Specific Heat Capacity @ 160˚ F(BTU/HR-Ft(2)/(F/ft)

Specific Heat Capacity @ 160˚ F

NOBURST® RTU30 30% PG
Boiling Point

102.2

Viscosity @ 160˚ F

0.82

Specific Gravity @ 72˚ F

1.021

Thermal Conductivity @ 160˚ F

0.271(BTU/HR-Ft(2)/(F/ft)

Specific Heat Capacity @ 160˚ F

0.953(BTU/HR-Ft(2)/(F/ft)

FREEZE
POINT

-6°F
40%
35% 0°F
30% 11°F

FLOW
POINT

40%
35%
30%

BURST
POINT

40%
35%
30%

0.939

-16°F
-10°F
2°F

> -60°F-60°F-8°F

SYSTEM PROTECTION
Freeze Point is the temperature where the first ice crystal forms in the fluid. Burst point is the temperature where the fluid is solid, expanding,and bursting the vessel. *Specific gravity measured at 72°F. **Viscosity, specific heat capacity, and thermal conductivity are measured at 160°F.

3

NOBURST -100
• Non-toxic• Non-corrosive• High efficiency• Blended with deionized water
NOBURST -100 is to be used in place of water and other water-like fluids in systems where
freezing may either cause damage or interfere with the functioning of systems or equipment
and/or toxicity to humans or animals is a concern. This product must NOT be used in
automotive cooling systems or with galvanized metals containing zinc or aluminum.

FREEZE
POINT

100%
75%
50% 0°F

FLOW
POINT

100%
75%
50%

BURST
POINT

-60°F
-30°F

75%

50%

Boiling Point

238

224

218

Viscosity @ 160˚ F

2.19

1.43

0.93

1.046

1.035

0.205

0.256

0.890

0.939

Specific
1.055
Gravity @ 72˚ F
ThermalConductivity @ 160˚ F 0.161

-70°F
-40°F
-10°F

100%
75%
50%

100%

-100°F-80°F-60°F(BTU/HR-Ft(2)/(F/ft)

Specific Heat
Capacity @ 160˚ F

0.806SUPER NOBURST• Concentrated formula• Non-toxic• Non-corrosive• High efficiency
SUPER NOBURST is for hydronic boilers and solar systems. With proper installation andannual inspection, it will protect systems from freeze damage and severe corrosion for 10
years. This product must NOT be used in automotive cooling systems or with galvanized
metals containing zinc or aluminum.

FREEZE
POINT
FLOW
POINT
BURST
POINT

4

100%
75%
50%
40% 0°F
100%
75%
50%
40%
100%
75%
50%
40%

>-60°F
-60°F

50%

40%

310

237

222

219

Viscosity @ 160˚ F 4.13

2.30

1.29

1.00

Boiling Point

-20°F
-70°F
-70°F
-30°F
-10°F

-100°F-100°F-80°F-60°F

100% 75%

Specific
Gravity @ 72˚ F
ThermalConductivity@ 160˚ F

1.052 1.054 1.044 1.031

0.126 0.157 0.217 0.251(BTU/HR-Ft(2)/(F/ft)

Specific Heat
Capacity @ 160˚ F

0.696 0.797 0.898 0.929

NOBURST AL• Use with all metals• Non-corrosive• Special inhibitor package• High efficiency• Blended with deionized water
An antifreeze and heat transfer fluid for systems which contain aluminum components.
NOBURST AL has inhibitor technology that is compatible with all metals commonly used inhydronic heating systems including brass, cast iron, steel, solder, copper, and aluminum.
This product must NOT be used in automotive cooling systems or with galvanized metals
containing zinc or aluminum. 1NOBURST AL is not to be used in contact with or potential
contact with potable water.

FREEZE
POINT
FLOW
POINT
BURST
POINT

100%
75%
50% 0°F
100%
75%
50%

-60°F
-30°F

75%

50%

Boiling Point

238

224

218

Viscosity @ 160˚ F

2.19

1.43

0.93

1.055

1.046

1.035

0.161

0.205

0.256

0.806

0.890

0.939

Specific
Gravity @ 72˚ F
ThermalConductivity @ 160˚ F

-70°F
-40°F
-10°F

100%
75%
50%

100%

-100°F-80°F-60°F(BTU/HR-Ft(2)/(F/ft)

Specific Heat
Capacity @ 160˚ F

NOBURST HD• Extended temperature range• Non-toxic• Non-corrosive• High efficiency• Blended with deionized water
NOBURST HD is a non-toxic* antifreeze and heat transfer ﬂuid with a special inhibitor
package allowing for use where system temperatures demand glycol stability. Safe foruse up to 325° F. Does not contain silicone-based additives, which can harm systems at
high temperatures. This product must NOT be used in automotive cooling systems or with
galvanized metals containing zinc or aluminum.

FREEZE
POINT

100%
75%
-16°F
50%
0°F
40%

-60°F
-60°F

FLOW
POINT

100%
75%
50%
40%

-70°F
-60°F

BURST
POINT

100%
75%
50%
40%

75%

50%

40%

310

237

222

219

Viscosity @ 160˚ F 4.13

2.21

1.26

0.99

Boiling Point

-26°F
-10°F

-100°F-100°F
-70°F
-60°F

100%

Specific
Gravity @ 72˚ F
ThermalConductivity@ 160˚ F

1.052

1.054 1.044 1.037

0.126

0.160 0.220 0.247

Specific Heat
0.696
Capacity @ 160˚ F

0.803 0.901 0.932(BTU/HR-Ft(2)/(F/ft)

5

APPLICATIONSSYSTEM TYPENOBURST-100

NOBURSTAL

Super
NOBURSTNOBURSTHDNOBURST
RTU

l

l

l

l

l

Hydronic heat systems
Solar heating systemslGeothermal systemsl“Air Hydronic”
heat pumps

l

l

l

“Air Hydronic” furnaces

l

l

l

Water-based heat
extraction systems

l

l

l

l

l

Cooling systems& chillers

l

l

l

l

l

Refrigerating systems

l

l

l

l

l

Cooling towers

l

l

l

l

l

Industrial heat transfer

l

l

l

l

l

Plumbing winterizationlSnow melt systemslIn-floor heating

l

l

l

l

l

l

l

l

l

l

HEAT TRANSFER PROPERTIES
Relative System
Efficency2

Thermal Conductivity Viscosity
BTU/HR/FT/°F(Centipoises)

Foam
Character

Cold Protection
Level (F °)

Water

1.000

0.35

0.42

None

+32°

Noburst -100 (50%)

0.930

0.256

0.93

None

-60°

Noburst -100 (75%)

0.833

0.205

1.43

None

-80°

Noburst -100 (100%)

0.799

0.161

2.19

None

-100°

Ethylene Glycol (50%)

0.896

0.237

1.40

Slight-34°

Ethylene Glycol3 (75%)

0.772

0.183

2.75

Slight-60°

Ethylene Glycol3 (100%)

0.693

0.151

5.00

Slight+5°

Silicone SlyTherm 444

0.351

0.082

9.86

Slight-121°

SlyTherm8004

0.369

0.074

5.00

Slight-40°

Synthetic Hydro-Carbon3

0.475

0.070

11.69

High

-40°

Therphenyl

0.409

0.0677

9.86

Very High

-20°

3

6

6

4

1. Table data obtained from Dow
Chemical, Noble Company tests,
and competitors’ product literature. All comparisons (except
cold protection level) are at fluid
temperatures of +150°F.
2. System efficiency as a functionof specific heat and fluid densitywith no change in fluid flow rate.
3. Data is for DowTherm brand
Ethylene Glycol, Trademark andproduct of the Dow Chemical
Company.
4. Slytherm is a Trademark andproduct of Dow-Corning Corporation.
5. Data is for H-30, a product ofMark Enterprises.
6. Data is for Therminal 66
Modified Terphenyl6, a product ofMonsanto Industrial Chemicals
Company.

FLUID INSTALLATIONNEW SYSTEMEXISTING SYSTEM

Empty/flush fluid

Add NOBURST
product or water
until desired freeze
temp is obtained

Clean by circulating
scale/boiler cleaner

If mixture is incorrect

Empty/flush fluid

Test mixture withpropylene glycol
refractometer

Test Noburst with apropylene glycol
refractometer for
proper concentration

Mix NOBURST
product with
deionized/distilledwater to desired
freeze temperature(see mix chart on
container)

For NOBURST AL:
Clean by circulating
NOBURST
Hydronic System
Cleaner
For NOBURST-100, SuperNOBURST,NOBURST HD, andNOBURST RTU:
Clean by circulating
NOBURST System
Pre-Cleaner

Empty/flush fluid

Fill with clean water,
circulate, thenemptyInstall into systemand circulate

If mixture is correct

Purge excess air
from system

Pull sample fromsystem and testfor pH and proper
freeze temperature

Record test results
and date on
system tag

FLUID MAINTENANCE
Draw a fluid sample

If fluid is dark, dirty,
or smells acidic

If fluid is clean

Use a pH tester tomeasure the fluid’s
pH OR send sample
to Noble Company
for testing

For NOBURST AL:
If the pH of the fluid
tests between 7
pH & 8.0 pH, add
NOBURST AL
Inhibitor (pH should
be between 8 & 9.0)
For NOBURST-100, SuperNOBURST,NOBURST HD, andNOBURST RTU:
If the pH of the fluid
tests between 7
pH & 8.0 pH add
NOBURST Inhibitor
Boost (pH should
not exceed 12.0)

Drain the fluid anddisposeRefer to NOBURST
product fluid
installation chart

If the pH of fluid test
below 7.5 pH

Test NOBURST
product with apropylene glycol
refractometer fordesired freeze
temperature

Drain the fluid anddisposeIf mixture is correct

If mixture isincorrect

Add NOBURST
product or water
until desired freeze
temp is obtained

Record test results
and date on
system tag

MAINTENANCE
Systems with NOBURST installed should be tested at least annually foradequate NOBURST concentration and corrosion inhibitor protectionlevel. If NOBURST concentration is low, add NOBURST according to thisFORMULA TO INCREASE NOBURST CONCENTRATION:
Example:• 400 Gallon Capacity• 75% NOBURST Desired• 50% NOBURST currently in system• 100% NOBURST in a NOBURST container• Step 1: 75 minus 50 = 25 (Desired – Current)• Step 2: 100 minus 50 = 50 (100% NOBURST – Current)• Step 3: 400 x 25 = 10,000 (Capacity x {Desired – Current})• Step 4: 10,000 divided by 50 = 200

Conclusion: 200 gallons of NOBURST -100 must be added to the 200
gallons of 50% solution currently in the system to reach a 75% totalsolution.
Before adding additional NOBURST, drain adequate fluid from the system
so that when the new NOBURST is added, the operating pressure will not
be too high. If the corrosion inhibitor tests low, add one pint of NOBURST
Inhibitor Boost for every 20 gallons of fluid capacity of the system. If thetotal system capacity is less than 20 gallons, use one pint. If after Inhibitor
Boost addition and thorough system mixing the corrosion inhibitor still
tests low, add another pint for every 20 gallons system capacity. If after
this addition the inhibitor still tests low, the system has been contaminatedwith minerals or an acidic chemical. The system should be drained,
cleaned, and recharged with fresh NOBURST.
7

TESTING ACCESSORIESTESTINGTEST KIT (10 TEST STRIPS)

To test the freeze protection level of NOBURST,
the correct instrument must be used.

• For testing the concentration and reserve alkalinity

FLAMMABILITY: Non-flammable.

• For determining the actual level of freeze andcorrosion protection in a system

NOBURST is not flammable since it has no
measurable flashpoint (Pensky-Martens ClosedCup); however, if the product comes in extended
contact with open flame, it is possible it will ignite.
Safety Data Sheets available upon request.

For use with: NOBURST -100, Super NOBURST,
and NOBURST HD, NOBURST RTU

FUMES: Non-hazardous.
ENVIRONMENTAL HAZARD: Low.
REFRACTOMETER• For testing the freeze point• Use for testing propylene glycol• Can be used to test batteries
For use with: NOBURST -100,
Super NOBURST, NOBURST HD, NOBURST AL,
NOBURST RTU
PALM ABBE DIGITAL REFRACTOMETER• Instant results of freezing
point (PG & GL) and% concentration by volume• Use for testing propylene glycol
and glycerine• Auto calibration
For use with: NOBURST -100, Super NOBURST,
NOBURST HD, NOBURST AL, NOBURST RTU

NOBURST is not toxic to animals or plants.
Spills may generally be disposed of through city
sanitary sewer; however, local sewer authorities
should be contacted prior to disposal. Large
spills, uncontrolled disposal, and waterway
discharge should be avoided since NOBURST
biodegrades rapidly, possibly depleting oxygen
supply in bodies of water which can result in fish
kill. All uncontrolled spills should be reported
to local authorities. Water softeners should be
disconnected from the boiler or provided withbackflow protection to prevent contamination of
the mineral bed.

SYSTEM MAINTENANCE
SYSTEM PRE-CLEANER

ALL METALS INHIBITOR• Removes flux, oil, and grease
from new systems, assuring
maximum performance.

• Reduces the rate of corrosion andhelps prevent scale formation onheat exchanger surfaces.

• Use one pint for every 50 gallons
of system capacity.

• Safe on all metal systems(including aluminum).

For use with: NOBURST -100,
Super NOBURST, NOBURST HD,
NOBURST RTU• Can be used with water only
systems.

INHIBITOR BOOST• Regenerates corrosion inhibitorsand extends the life of NOBURST ina system.

• Suitable for use with Onix &Pex tubing used in hydronic
installations.
• Use one gallon for every 50
gallons of system capacity.
For use with: NOBURST AL• Use one pint for every 20 gallons ofsystem capacity.
For use with: NOBURST -100,
Super NOBURST, NOBURST HD,
NOBURST RTU
E-3 DEFOAMING AGENT• To aid in removing air from thesystem. Air can cause corrosion,
reduce circulation, waste energy,
and cause noise.
• Use one pint for every 25 gallons
of system capacity.
For use with: NOBURST -100,
Super NOBURST, NOBURST RTU

HYDRONIC SYSTEM CLEANER• Penetrates and disperses a broad
range of mineral and organic
deposits.
• Helps recover efficiency in older,corroded systems.
• Cleans aluminum, iron, copper,
brass, and stainless steel.
• Suitable for use with Onix & PEX
tubing. Contains no TSP, acids, or
heavy metals.
• Use one gallon for every 50
gallons of system capacity.
For use with: NOBURST -100,
Super NOBURST, NOBURST HD,
NOBURST AL, NOBURST RTU

SYSTEM REQUIREMENTS, LIMITATIONS & CAUTIONSTECHNICAL SUPPORTNOBURST should not be used in systems where temperatures regularly
exceed 275°F or in systems that are permanently open to the atmosphere.

Noble offers technical services for the following:• Specifications 		• Field Services• Installation Design 		• Fluid Testing• Installation Techniques and Unique Applications

Use NOBURST HD in systems where temperatures exceed 275°F, up to
325°F, such as solar hot water systems.
• Systems constructed of aluminum will also experience corrosion withNOBURST, particularly if high temperatures (125°F +) are expected. For
systems with aluminum, use NOBURST AL. All other common metals
are protected from corrosion with NOBURST -100, Super NOBURST,
NOBURST HD, and NOBURST RTU.
• NOBURST products should not be used in systems containing
galvanized metal. NOBURST is not recommended for use with CPVC or
PVC.
• Should not be used in steam-type heating systems.
• Should not be used as a coolant for internal combustiossssssssn
engines.
• Although existing systems require no modification, in new systems
being designed for use with NOBURST, the following modifications arerecommended: (1) the expansion tank should be sized to allow about
4% greater expansion than for plain water in the same temperature
range; (2) the pump head should be increased by 10% over the minimum
requirements for those with plain water; and (3) a strainer should beinstalled in the return line ahead of the pump.

Address inquiries ATTN: NOBURST Technical Support,
Email sales@noblecompany.com or phone at: (800) 878-5788
Field services are available through factory representatives andNoble Company staff. Contact Noble Company for local representatives.
Additional product information and SDS are available immediately
through our website at www.noblecompany.com

Q
FDA REFERENCENOBURST -100, NOBURST HD, Super NOBURST, andNOBURST RTU are considered “Generally Recognized as
Safe” by the Federal Food & Drug Administration. Non-Toxic isused to describe extremely low chronic and acute toxicity. No
maximum safe intake for humans has been established.

TOXICOLOGICAL, ENVIRONMENTAL,• A well-maintained hydronic system using NOBURST should not require& HEALTH INFORMATION
other treatment chemicals. NOBURST should not be used with otherwater treatment chemicals. Noble Company cannot test all possible
Gosselin Toxicity Index (Propylene Glycol): 1 “essentiallycombinations of chemicals for compatibility and proper performance.
non-toxic”. Mean Single Lethal (Oral) Dosage: greater than
Although NOBURST is compatible with the leading stop-leak chemicals,
oneLogoliter. FDA
Reference:
Propylene White
Glycol: and
21 CFR
184.1666, Logo and Logo w
Color
Logo
Logo w/Slogan
and Logo
w/SloganTransparent
we do
not andrecommend
the use of these chemicals because of their White and Color
Dipotassium Phosphate: 21 CFR 182.6285. Both qualify as
possible detrimental influence on equipment.
“Generally Recognized as Safe for use as Direct Food Additives”.

7300 Enterprise Drive, Spring Lake, MI 49456 · (800) 878-5788 · Fax: (231) 799-8850 · www.noblecompany.com® Registered Trademark of Noble Company ™ Trademark of Noble Company © 2020 Noble Company
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