Protective Coatings

Amercoat 325
Polyamide-cured Coaltar Epoxy
Product Data/ Physical data

Application Instructions Finish ............

Colour .............
Flat
Black, Dark Brown
Substrate ......... Steel or concrete
Components ........ 2
Curing Mechanism .. By solvent release and
 400 microns of protection in only one coat, thereby chemical reaction between
eliminating intercoat adhesion problems of two-coat components
coaltar epoxies. Volume solids ..... 76% (ASTM-D-2697)*
Dry Film Thickness. 400 microns/per coat
 One coat application significantly reduces labour
Number of coats ... 1
cost. 2
Calculated coverage 1.9 m /L
 Superior application by airless and conventional
spray. Allow for application losses, surface irregularities, etc.
 For immersion, tanklining and non-immersion
service. Application methods….. Airless or conventional spray
 Broad chemical resistance. Pot life at 20°C... 4 hours
Curing times:
Typical Uses to full service. 10 days
IMMERSION - Intermittent or continuous immersion
on marine structures, hulls and ship bottoms. Resists Pot life is dependent on temperature and quantities mixed.
impressed current cathodic protection levels up to Drying times at 20°C at 400 microns dft :
850 millivolts (with respect to Cu/CuSO4 reference to handle ....... 16 hours
electrode) when used with Amercoat primer. Lining Induction time at 20°C
for tank interiors in contact with fresh water or to full cure……….. 10 days
seawater, alkalies, salt solutions and sour crude. Mixing ratio (by volume):
NON-IMMERSION - Areas exposed to chemical Component A ...... 4 parts
fumes, splash or spillage. Piers, pipelines and Component B ...... 1 part
structural steel in oil refineries, power plants and Spec.grav.mixed product 1.26 kg/L
chemical plants. Thinner ........... Thinner 21-06
Cleaner ........... Thinner 21-06
Flash points (Closed Cup):
Recommended Systems Component A ..... 27°C
(For immersion and non-immersion systems.) Component B ..... 27°C
Normally, Amercoat 325 requires no primer, but in the Thinner ......... 24°C
event a holding primer is called for, Amercoat 71 Cleaner ......... 24°C
Primer may be used. With Dimetcote Primer,
Amercoat 71 is recommended as a tiecoat between Packaging :
Amercoat 325 and Dimetcote. Component A ..... 20 L in 25 L can
Component B ..... 5 L in 5 L can
Shipping weight :
Component A ..... Approx. 28.0 kg
Component B ..... Approx. 6.3 kg

Shelf life :
Component A + B..... 1 year from shipment date when
in unopened, original containers at 5 to 40°C.

* Volume solids is measured in accordance with ASTM-D-

2697. Slight variations may occur due to colour and testing
variances.

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Amercoat 325
Chemical Resistance Suitability of Amercoat 325 IMMERSION - Blast all steel in accordance with
Environment Immersion Splash and Fumes and Swedish Standard SA 3 SIS 05 5900-1967 Steel
spillage weathering (1) Structures Painting Council SP 5. Blast to achieve a
Acidic No Yes Yes 50 to 100 microns profile as determined with a Keane
Alkaline Yes Yes Yes Tator Surface Profile Comparator or similar
Crude oil Yes Yes Yes instrument. Remove abrasive residues and dust from
Refined petroleum surface.
products Limited (2) Yes Yes CONCRETE - Light abrasive blasting is best to
Solvents Yes Yes remove all previous coatings, chalk and surface glaze
Salt solutions
or laitance. After blasting, small holes or voids in cast
Acidic Limited Yes Yes
Neutral Yes Yes Yes concrete wall or overhead surfaces should be filled
Alkaline Yes Yes Yes with a Filler compound before applying Amercoat
Water Yes Yes Yes 325.
AMERCOAT 71 - Surfaces must be dry and free of all
contamination. Refer to application instructions for
Amercoat 71 for drying and curing times limitations.
The above chart is only a guide to show typical IMPORTANT - Apply Amercoat 325 as soon as
resistance and limitations of Amercoat 325. Your PPG possible after surface preparation to prevent
representative will help you evaluate your particular recontamination. Do not leave blasted steel uncoated
corrosion protection needs and make the correct overnight. In case of contamination, remove
recommendations for your specific requirements. contaminants. Spot blast steel if needed.
(1) Due to the nature of the epoxy resin, chalk will
form on prolonged exposure to sunlight but does not
affect protective properties. Application Equipment
(2) May discolour refined products. The following equipment is listed as a guide and
suitable equipment from other manufacturers may be
used. Adjustments of pressure and change of tip size
Application Data Summary may be needed to obtain the proper spray
For complete information on procedures, equipment characteristics.
and safety precautions, see application instructions. AIRLESS SPRAY - Standard airless spray
Like all high-performance coatings Amercoat 325 equipment, such as Graco, DeVilbiss, Nordson-Bede,
must be applied as recommended to obtain the Spee-Flo, or others having a 28:1 or higher pump
maximum protection for which this coating is ratio and a fluid tip with a 0.45 to 0.67 mm orifice.
formulated. CONVENTIONAL - Industrial equipment such as
SURFACE PREPARATION - Steel abrasive blast. DeVilbiss MBC or JGA or Binks No. 18 or 62 spray
Concrete abrasive blast or acid etch. gun. Separate air and fluid pressure regulators,
EQUIPMENT - Standard industrial spray equipment, mechanical pot agitator and a moisture and oil trap in
airless or conventional. the main air supply line are recommended.
APPLICATION - Obtain 400 microns dry in one coat. MIXER - Use power mixer. Mixer must be powered by
Apply in even, parallel passes with 50% overlap, an air motor or an explosion proof electric motor.
immediately followed by additional cross-spray
passes to obtain proper thickness. Environmental Conditions
Exposure to most atmospheric conditions as soon as (During application)
sufficiently hard to withstand the handling required. Air temperature: 5 to 50°C
Surface temperature: 5 to 60°C
Immersion in water where abrasion is not critical, Material temperature: 10 to 38°C
such as ships' ballast tanks or bilges, in 72 hours at To prevent moisture condensation during application,
20°C. surface temperature must be at least 3°C above dew
Full cure, where maximum chemical or abrasion point. Minimum temperature for satisfactory cure is
resistance is required, takes 10 days at 20°C. 10°C.

Surface Preparation
STEEL - Welds should be continuous with no
skipwelds on overlapping steel surfaces.
NON-IMMERSION - Blast in accordance with
Swedish Standard SA 2.5 SIS 05 5900 - 1967 or
Steel Structures Painting Council SP 10.

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Amercoat 325
Drying and Curing times Application Procedure
The curing process requires evaporation of solvents Amercoat 325 is packaged in the proper mixing
and chemical reaction between components and is proportions of component A and B solution.
dependent upon time, temperature and proper Component A: 20 L in 25 L can
ventilation. Component B: 5 L in 5 L can

For most exterior atmospheric exposures, the coating 1. Flush all equipment with recommended Thinner before
may be placed in service as soon as it has dried use.
sufficiently to withstand handling.
2. Stir each component thoroughly then combine and mix
until uniform. Do not mix more material than can be used
For immersion in water, where early abrasion with 2 hours at 21°C (70°F) and 1 hour at 30°C (86°F).
resistance is not required such as ships, ballast tanks potlife is shortened by higher temperatures.
or bilges, the required curing time is 72 hours at 20°C.
3. For conventional spray. Thin only as needed for
Where the maximum chemical or abrasion resistance workability with no more than approximately 10 vol % of
is required or for critical applications such as recommended Thinner.
circulating waterlines, the coating must be fully cured Thinning is normally not needed for airless spray.
according the following schedule:
4. When applying by conventional spray, use adequate air
pressure and volume to ensure proper atomization.
Surface Temperature : 10°C 20°C 35°C
Fully cured 28 days 10 days 4 days 5. Stir during application to maintain uniformity of material.
Apply a wet coat in even parallel passes. Overlap each
pass 50% to avoid bare areas, pinholes or holidays.
The indicated drying and curing times are for a dry
film thickness of 400 microns. If the thickness is 6. Double coat all welds, rough spots, sharp edges and
greater allow additional curing time. In all cases corners, rivets, bolts, etc..
higher temperatures will shorten and lower
temperatures will lengthen the curing times. 7. Application at 526 microns wet film thickness will
normally provide 400 microns dry film.
Repair 8. Check thickness of dry coating with a non- destructive
For repaired of damaged, imperfect or thin areas, dry film thickness gauge. Such as Microtest or Elcometer, if
additional Amercoat 325 should be applied within the dry film thickness is less than 300 microns, apply additional
following maximum drying times to assure proper material. Total dry film thickness must not exceed 450
adhesion: microns.

Surface Temperature 10°C 20°C 30°C 9. When pinhole testing is required, check continuity of dry
Maximum drying time: 72 hours 24 hours 16 hours but uncured coating with a non-destructive holiday detector.

10. Small damaged or bare areas and random pinholes or

NOTE: Do not allow more than six hours of total holidays can be touched up by brush. Repair large areas by
sunlight exposure before applying repair coat and spray.
protect against rain, moisture or condensation,
otherwise intercoat adhesion may be impaired. If the 11. In confined areas ventilate with dry and clean air during
maximum drying time has been exceeded, the application and drying until all solvents are removed.
surface must be roughened by brush blasting before Temperature and humidity of ventilating air must be such
applying repair coat. that moisture condensation will not form on surface.

13. Clean all equipment with recommended Thinner

immediately after use or at least at the end of each working
day or shift. When left in spray equipment. Amercoat 346
will cure and cause clogging

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Amercoat 325

Any recommendations or suggestion relating to the use of

Caution the products made by PPG, whether in its technical
This product is flammable. Keep away from heat and open literature, or response to specific enquiry, or otherwise, is
flame. Keep container closed. Use with adequate based on data believed to be reliable; however, the
ventilation. Avoid prolonged and repeated contact with skin. products and information are intended for use by Buyer’s
If used in confined areas, observe the following precautions having requisite skill and know-how in the industry, and
to prevent hazards of fire or explosion or damage to the therefore it is Buyer to satisfy itself of the suitability of the
health: products for its own particular use and it shall be deemed
1. circulate adequate fresh air continuously during that Buyer has done so, as its sole discretion and risk.
application and drying; Variation in environment, changes in procedures of use, or
2. use fresh air masks and explosion proof equipment; extrapolation of data may cause unsatisfactory results.
3. prohibit all flames, sparks, welding and smoking.
Do not empty into drains. Take precautionary measures
against static discharges. For specific information on Limitation of Liability
hazardous ingredients, required ventilation, possible PPG’s liability on any claim of any kind, including claims
consequences of contact and safety measures see Safety based upon PPG’s negligence or strict liability, for any loss
Data Sheet. or damage arising out of, connected with, or resulting from
the use of the products, shall in no case exceed the
purchase price allocable to the products or part thereof
Safety which give rise to the claim.
Since improper use and handling can be hazardous to In no event shall PPG be liable for consequential or
health and cause of fire or explosion, safety precautions incidental damages.
included with Product Data/Application Instruction and
Material Safety Data Sheet must be observed during all Due to PPG’s policy of continuous product improvement,
storage, handling, use and drying periods. the information contained in this Product Data/Application
Instructions sheet is subject to change without notice. It is
the Buyer’s responsibility to check that this issue is current
Warranty
prior to using the product. For the most up-to-date Product
PPG warrants its products to be free from defects in
Data/Application Instructions always refer to the
material and workmanship. PPG’s sole obligations and
PPG Protective & Marine Coatings website at
Buyer’s exclusive remedy in connection with the products
www.ppgpmc.com
shall be limited, at PPG’s option, to either replacement of
products not conforming this warranty or credit to Buyer’s
To avoid any confusion that may arise through translation
account in the invoiced amount of the non-conforming
into other languages, the English version of the Product
products. Any claim under this warranty must be made by
Data/Application Instructions will be the governing literature
Buyer to PPG in writing within five (5) days of Buyer’s
and must be referred to in case of deviations with product
discovery of the claimed defect, but in no event later than
literature in other languages.
the expiration of the applicable shelf life, or one year from
the delivery date, whichever is earlier. Buyer’s failure to
notify PPG of such non-conformance as required herein Condition of Sale
shall bar Buyer from recovery under this warranty. All our transactions are subject to our Terms and Conditions
of Sale.
PPG makes no other warranties concerning the
product. No other warranties, whether express, implied
or statutory, such as warranties of merchantability or
fitness particular purpose, shall apply. In no event shall
PPG be liable for consequential or incidental damages.

PPG Coatings Europe BV

www.ppgpmc.com

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