Compliant VOC High Build Modified Silicone Coating Supplier in China
Compliant VOC High Build Modified Silicone Coating paint coating manufacture Shenzhen China  
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Fire proof retardant heat resistance coating

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Compliant VOC High Build Modified Silicone Coating
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General Purpose Aqueous Based Fire Retardant Surface Coating
Solventborne Silicone Coating
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Fire Retardant Coating


Compliant VOC High Build Modified Silicone Coating


Topcoat System is a VOC
compliant, high build, modified silicone coating formulated for
the protection of metal surfaces under insulation exposed to
temperatures from ambient to 450°F (232°C). This coating
system is specifically formulated to be applied directly to
surfaces operating between ambient temperature and up to
350°F (177°C). Thurmalox 218/219 performs exceptionally in
continuous CUI immersion of hot and/or boiling water. The
system has excellent resistance to continuous and/or rapid
wet-dry-wet thermal cycling to 450°F (232°C). It is tough,
durable and has excellent resistance to damage during
transportation, storage, erection and insulation applications.
Recommended Uses
• Insulated hot equipment and piping
• Insulated equipment exposed to severe thermal shock to
450°F (232°C)
• Equipment under insulation exposed to wet-dry-wet
cyclic conditions from ambient to 450°F (232°C)
• Apply directly to metal surfaces as hot as 350°F (177°C)
• Coat hot equipment without being shut down
• Maintains greater flexibility at elevated temperatures as
compared to conventional epoxy systems.
• Re-insulate after 24 hours
• High solids, high build
• Excellent thermal cycling resistance
• VOC compliant system
Surface Preparation - Carbon Steel
1. To ensure optimum long-term coating system
performance, surfaces must be clean, dry and free from
dirt, oil, grease, salts, welding flux, mill scale, rust,
oxides, old paint, corrosion products or other foreign
2. Remove all surface imperfections that will induce
premature coating system failure. Chip or scrape off
weld splatter. Grind down sharp and rough edges,
gouges, and pits.
3. Abrasive blast surface per specification SSPC-SP 10,
“Near-White Blast Cleaning”, or per NACE Standard No.
2 to a profile depth of 1.5 - 2.0 mils. Abrasive used in
blasting should be selected carefully from materials of
mesh size required to produce the desired anchor
Application Guidelines
Surface temperature must be at least 5°F (3°C) above dew
Insulated Carbon and Stainless Steel*
Primer: Thurmalox 218 5.0-6.0 mils
(125-150 microns)
Topcoat: Thurmalox 219 5.0-6.0 mils
(125-150 microns)
Total dry film thickness 10.0-12.0 mils
(250-300 microns)
Surface Preparation - Stainless Steel
1. Surfaces must be clean and dry. Remove all oil, grease,
soil, drawing and cutting compounds, and other foreign
matter by methods outlined in Steel Structures Painting
Council Specification SSPC-SP 1, "Solvent Cleaning",
using Dampney 170 Cleaning Solvent.
3. For large surface areas blast with "Starblast XL"* to
achieve a surface profile of 1.5-2.5 mils.
4. For small surface areas, power sand following SSPC-SP
11, “Power Tool Cleaning”, using 16 or 24 grit aluminum
oxide coated abrasive fiber disc attached to a rubber pad
*Starblast is a Dupont registered trademark
Application Guidelines
Surface temperature must be at least 5°F (3°C) above dew
Uninsulated Stainless and Carbon Steel*
Primer: Thurmalox 218 5.0-6.0 mils
(125-150 microns)
2nd coat: Thurmalox 219 5.0-6.0 mils
(125-150 microns)
Topcoat: Thurmalox 217 1.5-2.0 mils
(35-50 microns)
Thurmalox 218 Primer and Thurmalox 219 Topcoat are two
component coatings consisting of a Part A and Part B that
must be mixed together before use. The mix ratio for
Thurmalox 218 is 4:1 and that of Thurmalox 219 is 2:1 by
volume. The individual component should be mixed
separately to disperse pigment uniformly. Add Part B to Part
A and mix thoroughly with a low-speed power mixer for a
minimum of 3 minutes or until mixed coating is completely
blended and of uniform color.
Application Equipment
Thurmalox 218/219 coatings may be applied by brush, roller,
airless spray or conventional spray. Brush/Roller: Extra
care should be taken to measure and hold film thickness
when applied by brush and roller. This method should only be
used when spray method is not available. Brush: Use a
medium china bristle with steel shank and wooden handle.
Do not use synthetic-bristled brushes. Roller: Use a wooden
handled roller with a 1/2” phenolic cored lambs wool roller
attached. Roll coating out thoroughly, maintaining a
continuous wet edge and uniform appearing paint film.
Conventional Spray:

Spray gun

DeVilbiss JGA402 or equal

Fluid tip


Air Cap


Fluid hose*

3/8” ID

Air hose

5/16” ID

Atomizing pressure

60 psi

Provide material pot with agitator, regulators for fluid and air
pressure, and oil and moisture traps in supply line.
*Smaller hose diam. or length over 25 ft. may require
increased pressure.
Airless Spray:

Spray gun

Graco 205-591, 208-663

Fluid tips*

163-610, 163-315


Graco Bulldog 30:1

Fluid hose

3/8” to 1/2” ID

Air pressure to pump

100 psi

Pump operating pressure

80-90 psi

*Use Reverse-A-Clean® tips for fast, easy clean out.
Procedures for Application to Hot Surfaces
1. Flush spray equipment with Dampney 162 Thinner
before use.
2. Thinning of Thurmalox 218/219 coatings is not normally
required for spray application.
3. Dampney 162 Thinner is a high flash point (102°F), slow
evaporating solvent formulated especially for application
to hot surfaces.
4. WARNING! DO NOT use any other solvents to thin
Thurmalox 218/219 coatings. A fire hazard may result
from use of solvents with low auto ignition temperatures
when applying Thurmalox 218/219 coatings to hot
surfaces, and rapid solvent evaporation can cause dry
spray and poor film characteristics.
5. Use Dampney 162 Thinner cautiously. Addition of a
small amount of thinner will cause a great reduction in
coating viscosity. Excessive thinning will cause runs or
For conventional spray use adequate air pressure and
volume to obtain proper atomization. Be aware that
procedures for applying coatings to hot surfaces are
somewhat different from those normally used for application
to ambient temperature surfaces.
The following factors should be taken into consideration:
a) Heat radiating from the surface and/or strong winds will
promote dry spray.
b) To avoid dry spray, always apply coatings perpendicular
to hot surfaces without reaching.
c) Perpendicular spraying will also minimize overspray and
lap marks.
On each pass of the spray gun a thinner than normal paint
film must be applied to facilitate the heat-accelerated escape
of solvents without leaving pinholes.
Note: Thurmalox 218 will take on an amber tone at 250°F
(121°C). This is normal.
Only thin Thurmalox 218/219 coatings with Dampney 162
Thinner. Do not thin beyond federal, state and/or local VOC
emission regulations. Note: Use of other thinners not
approved by Dampney may hinder product performance and
void product warranty.
Cure Time 200°F (93°C) 50% RH
Thurmalox 218/219 Coating System will cure within 8 hours.
Allow 4 hours dry time between coats with a maximum recoat
time of 5 days. A temperature of 200°F (93°C) must be
achieved for the coating system to withstand hot/boiling
water. Higher application temperature will reduce cure time.
Thoroughly flush spray equipment and hoses immediately
after use with Dampney 162 Thinner. Dismantle spray
equipment and clean parts, brushes and rollers with
Dampney 162 Thinner.
Store in a cool, dry place with temperature between 50°F and
100°F (10°C and 38°C). Keep container closed when not in
Precautionary Information
WARNING: Flammable Liquid and Vapor
Keep away from heat, sparks and flame. Vapors may cause
flash fire. Do not breathe vapors or spray mist. Avoid contact
with eyes, skin and clothing. Use with adequate ventilation
during mixing and application. Wear an appropriate, properly
fitted organic vapor cartridge-type respirator (NIOSH
approved) during and after application unless air monitoring
demonstrates vapor/mist levels are below applicable limits.
Follow respirator manufacturer’s directions for respirator use.
Wash thoroughly after handling. Wear protective gloves,
chemical safety goggles and impervious protective clothing.
Use skin cream. In confined spaces it is required to use a
positive pressure supplied-air respirator (NIOSH approved).
Use explosion-proof lights and electrical equipment. Use only
nonsparking tools and equipment. Wear conductive and
nonsparking footwear. Make certain all electrical equipment
is grounded. Observe all safety precautions and follow
procedures described in OSHA regulations. See Material
Safety Data Sheet (MSDS) for complete precautionary and
disposal information.
If instructions and warnings cannot be strictly followed, do not
use this product.


Thurmalox 218 Primer

Thumalox 219 Topcoat

Generic Type

Modified Silicone

Modified Silicone

Mix Ratio by volume




Light Gray


Temperature resistance**




450°F (232°C)

 450°F (232°C)


500°F (260°C)

 500°F (260°C)

Percent (%) Solids by volume



Dry film thickness per coat

5.0 – 6.0 mils (125 – 150 microns)

5.0 - 6.0 mils (125 - 150 microns)

Wet film thickness per coat

8.0 – 10.0 mils (200 – 250 microns)

8.0 - 10.0 mils (200 - 250 microns)

Theoretical coverage

1000 mil. sq. ft. per gallon

937 mil. sq. ft. per gallon


24 sq. m. @ 25 microns per liter

22 sq. m.@ 25 microns per liter

Application temp. @ 50% RH

Ambient 50°F-350°F (10°C-177°C)

Ambient 50°F-350°F (10°C-177°C)

*Cure time @ 50% RH



To recoat (minimum)

4 hours

4 hours

To recoat (maximum)

5 days

5 days

To re-insulate

24 hours

24 hours

Weight per gallon

11.1 lb (5.0 kg)

14.6 lb (6.6 kg)

Pot life

2 hours

2 hours

Shelf life

1 year

1 year

Volatile organic compounds

2.5 lb./gal. (300 g./l.)

2.8 lb./gal. (336 g./l.)

* A temperature of 200°F (93°C) must be achieved for the coating system to withstand hot/boiling water.
** Note 218 will change to amber color at 250°F (121°C). This is normal.


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