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Technical Bulletin

EP-6308
JUNE, 1990
Supersedes all previous publications


EP-6308 Epoxy Phenolic Coating

GENERIC TYPE: Baking cross-linked epoxy-phenolic.

RECOMMENDED USAGE: Heresite EP-6308 coating is a high performance coating capable of providing economical protection in severe, and chemically corrosive environments. It is formulated explicitly for sustained immersion for tank linings, heat transfer equipment, spiral heat exchangers, fans, blowers, filter plates, tank cars, tank trailers, duct work, exhaust hoods, and other industrial equipment.

Heresite EP-6308 meets the requirements of the U.S. Federal Register, Food and Drug Regulations, Title 21, Chapter 1, Paragraph 75.300.

CHEMICAL RESISTANCE GUIDE:
EXPOSURE SPLASH & SPILLAGE IMMERSION
Acids Excellent Good
Alkalies Excellent Excellent
Solvents Good Fair
Inorganic Salts Excellent Excellent
Water Excellent Excellent

ORDERING INFORMATION:

Shipping Weight:
EP-6308 Approx. 10 lbs./gal.
S-330 Solvent Approx. 8 lbs./gal.
Flashpoint (T.C.C.):
EP-6308 23oF (-5oC)
S-330 Solvent 23oF (-5oC)
PHYSICAL DATA:
V.O.C.: 3.6 lbs./gal. as supplied
Solids by Weight: approx 62%
Solids by Volume: approx 49%
Pot life: N/A
Shelf life: 12 mos. @ 70oF (21oC)
Viscosity: 75-85 K.U. (Kreb Units)

TEMPERATURE LIMITATIONS: Heresite EP-6308 accepts dry heat temperatures up to 400F (204C). Short excursions up to 450F (232C) will be tolerated.

DIRECT IMPACT (ASTM D-2794): 10 inch/lbs.

ADHESION (ASTM D-3359): 5

STANDARD COLOR: EP-6308 -- Tan

COVERAGE: Theoretical coverage -- 784 square feet per gallon per mil. Recommended total dry film thickness is 5.0 to 7.0 mils in a 3-4 coat system.

At 6 mils DFT average coverage would be 105 square feet per gallon. This includes a 20% loss factor.

SURFACE PREPARATION: Remove all oil, grease and other contaminants from the surface with an appropriate solvent, such as Heresite S-330.

STEEL: Surface profile or anchor pattern shall be 20-25% of the recommended dry film thickness.

IMMERSION: A white metal blast is required in accordance with NANCE #1 OR SSPC-SP-5-63 specifications.

NON-IMMERSION: A commercial blast is acceptable in accordance with NANCE #3 OR SSPC-SP-6-63 specifications.

PRIMER: Not Required

MIXING: Mix thoroughly, making sure all settled pigments are redispersed.

THINNER & CLEAN UP SOLVENT: Heresite S-330 Solvent

THINNING: The amount of thinner required is dependent upon temperature, ventilation,humidity, spray equipment used, and desired film thickness. Adjust viscosity to 30 to 40 Zahn Cup #2. Suggested thinning is 30-40% at 75F (24C).

BAKE SCHEDULE

Intermediate Bake Surfaces
Normal 200F. - 250F. (93C-121C) for 10-20 minutes
Final Bake Surfaces
Minimum 400F. (205C) for -1 hours

To determine correct bake, saturate a cloth where acetone (S-275), rub coating lightly. Coating color should appear on cloth between coats, but not after final bake (cure).

APPLICATION:

  1. Do not apply if temperature is less than 5F (2C) above dew point, or if temperature is below 45F (7C).
  2. All spray equipment shall be thoroughly cleaned and the hoses in particular shall be free of old paint film and other contaminants.
  3. Use stand production type guns
    Guns Fluid Air
    DeVilbiss JGA-502 E 704
    Binks #62 66-SS 66-SD
    Graco P800 04 02

    Airless spray equipment, 1500-1800 PSI liquid pressure. Tip size from .013" to .018".

  4. Air supply shall be uncontaminated. Adjust air pressure to approximately 80 lbs. at the gun and provide 15-20 lbs. pot pressure. Adjust spray gun by first opening liquid valve and then adjust air valve to give approximately an 8" to 12" fan, holding gun perpendicular to the surface at a distance of 12".
  5. Apply a mist bonding pass. Allow to flash off for several minutes but not long enough to allow film to completely dry.
  6. Apply 3-4 criss-cross multi-passes maintaining a wet appearing film approximately 3 to 4 mils. Wet film thickness equals 1.5-2.0 mils dry film thickness.
  7. Air dry approximately 1 hour with ventilation, prior to introducing heat.
  8. After the air period has elapsed, the temperature should be raised approximately 40F (22C) in increments of 30 minutes until the desired temperature is reached.

RECOAT: After intermediate bake has cooled to 70F (21C).

STORAGE CONDITIONS: Coating should not be stored longer than 12 months at 70F (21C).

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APPLICATION INSTRUCTIONS

These instructions are not intended to show product recommendations for specific service. They are issued as an aid in determining correct surface preparation mixing instructions, and application procedure. It is assumed that the proper product recommendations have been made. These instructions should be followed closely to obtain the maximum service from the materials.

CAUTION: CONTAINS FLAMMABLE SOLVENTS. KEEP AWAY FROM SPARKS AND OPEN FLAMES. IN CONFINED AREAS WORKMEN MUST WEAR FRESH AIR LINE RESPIRATORS. HYPERSENSITIVE PERSONS SHOULD WEAR GLOVES OR USE PROTECTIVE CREAM. ALL ELECTRIC EQUIPMENT AND INSTALLATIONS SHOULD BE MADE AND GROUNDED IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE. IN AREAS WHERE EXPLOSION HAZARDS EXIST, WORKMEN SHOULD BE REQUIRED TO USE NONFERROUS TOOLS AND TO WEAR CONDUCTIVE AND NON SPARKING SHOES.


To the best of our knowledge the technical data contained herein are true and accurate at the date of issuance and are subject to change without prior notice. No guarantee of accuracy is given or implied. We guarantee our products to confirm to strict quality control. We assume no responsibility for coverage, performance or injuries resulting from use. Liability, if any, is limited to replacement of products. Prices are subject to change without prior notice. NO OTHER WARRANTY OR GUARANTEE OF ANY KIND IS MADE BY THE SELLER, EXPRESS OR IMPLIED, STATUTORY, BY OPERATION OR LAW, OR OTHERWISE, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

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