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Heresite Protective Coatings LLC ES-606 High-Performance Epoxy-Silane

ES-606 is formulated as a direct-to-metal coating. It exhibits excellent corrosion resistance, UV resistance and weathering qualities, along with good adhesion to ferrous and non-ferrous metals without complex pretreatment or primers. This two component coating is typically sprayed on internal and external surfaces of HVAC-R heat exchangers and related equipment. It is designed to be a robust spray-applied alternative to Heresite’s full immersion P-413 when components cannot be oven cured, logistics present challenges, or budgets necessitate spray application.

Product Type: 2K (2 component) Coating, Epoxy Coating

Features: Corrosion Resistant, Exceptional UV Resistance, Good Weather Stability, Improved Adhesion, Primerless

Application Area: Heat Exchangers

Compatible Substrates & Surfaces: Iron, Metal

Application Method: Spray

Chemical Family: Epoxy & Epoxy Derivatives, Silanes

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Application Area
Application Method
Compatible Substrates & Surfaces
Cure Method
Recommended Uses

Heresite ES-606 is a high-performance coating used to protect heat transfer equipment and components – including, but not limited to, coils, cabinets, piping.

Thinners and Cleanup

Product is provided at application viscosity, typically not requiring further thinning. S-275 can be used for cleanup.

Coverage

Theoretical coverage is 1,011 square feet per gallon at 1.0 dry mil (approximately 25 square meters per liter at 25 microns) / 674 square feet per gallon at 1.5 mils DFT (approximately 16.5 square meters per liter at 38 microns). Coverage rates are estimates and make no allowance for material loss. Actual rates will vary dependent on application method, surfaces, etc.

Surface Preparation

Unpainted or New Metal Surfaces: All surfaces must be clean, sound, and free of any oils, dirt, grease, wax and any other contamination that may interfere with coating adhesion. For optimal adhesion, it is recommended to clean with Heresite’s HSP-100 solution at a concentration of 25% by volume. Spray the diluted HSP-100 onto the parts, thoroughly wetting all areas. Do not allow the solution to dry – reapplying to areas as necessary. After 10 minutes of application, thoroughly rinse with clean water and immediately dry. Ensure surface is completely dry prior to application. Please note, that if cleaning steel, care must be taken to avoid flash rusting. To help prevent flash rusting, rinse with hot water and/ or immediately dry.

Previously Painted Metal Surfaces: Remove all loose coatings, rust and corrosion by scraping, sanding or sand blasting. In cases where there is a large amount of contamination, a commercial blast is acceptable in accordance with NACE #3 or SSPC-SP-6-63 specifications.

Application

Part A and Part B are packaged in pre-measured kits, with Part A being a short-filled gallon, allowing Part B to be added and mixed. The mixing ratio is 4 parts A to 1 part B by volume. Mix Part A and Part B separately using an explosion-proof power drill and blade type mixer. Add part B to Part A and thoroughly mix and blend using an explosion-proof power drill and blade type mixer. Mix only the amount that can be used within the estimated pot life. For optimum application, air and surface temperature should be from 50°F-90°F (10°C-32°C and at least 5°F (3°C) above the dew point.

  • Do not apply if temperature is less than 5°F (3°C) above dew point, or if temperature is below 50°F (10°C)
  • Use standard production type spray equipment (conventional or HVLP)
    • A typical conventional setup:
      • Gun: Binks #2100
      • Fluid: 66-SS
      • Air: 66-SSx21MD-2
      • Air pressure: 50 PSI (3.5 bar) at gun
      • Pressure pot: 15-20 PSI (1.0-1.3 bar) b. A typical HVLP setup: i. Gun: Graco AirPro ii. Nozzle size: 0.055” iii. Air pressure: 50 PSI (3.5 bar) at gun iv. Pressure pot: 15-20 PSI (1.0-1.3 bar)
    • A typical HVLP setup:
      • Gun: Graco AirPro
      • Nozzle size: 0.055”
      • Air pressure: 50 PSI (3.5 bar) at gun
      • Pressure pot: 15-20 PSI (1.0-1.3 bar)
  • Spray viscosity may be dependent on type of equipment being used
  • Spray equipment: always flush spray equipment with S-275 solvent to clean prior to applying coating
  • Air supply must be uncontaminated
  • Adjust spray gun by first opening liquid valve and then adjust air valve to give approximately a 8”-12” fan (20-30 centimenters), holding gun perpendicular to the surface at a distance of 12” (30 centimeters) (will be dependent on tip)
  • Apply the product in an even coat and maintain a wet edge
  • Use parallel and perpendicular passes to ensure complete coverage
  • Apply until the target dry film thickness of 1.0 – 1.5 mils (25-38 microns) is achieved
  • Allow ES-606 to air dry for a minimum of 24 hours at room temperature (77°F/25°C) prior to final assembly
    • Check dry by twisting thumb while applying pressure to paint, or check with fingernail. If the ES-606 appears to be soft, let dry further and recheck. The ES-606 is dry enough if you do not leave a thumbprint in the paint, or if the films feel hard/tough using your nail.Temperature and humidity can dramatically impact dry times.
Cleaning Frequency

At a minimum, coils should be inspected and cleaned at least once per year. In extreme environments, where the coils are exposed to high concentrations of salt air (within 25 miles of any seacoast), or where they are installed near engine exhausts, plumbing or manufacturing vents, or regularly exposed to corrosive chemicals, you may need to clean coils more often, up to 4 times per year.

Cleaning Process
  • Turn off electrical power to the unit using lock-out system
  • Flush the coil with water to rinse off loose residue. Allow the water to soak for 10–20 minutes to loosen surface residue
  • Flush the coil thoroughly with any mild liquid detergent and warm water (~100°F) until all signs of residue are eliminated. If harsher cleaners are required for your environment, please contact Heresite for advice
  • Rinse the unit thoroughly with clean water (it should not be brackish or contain excessive dissolved minerals)
  • Allow the unit to dry completely prior to turning the electrical power on or returning the unit to service.
Avoid
  • Water under high pressure, such as a high-pressure washer. Fins may fold under high pressure causing the coating to crack
  • Abrasive products or processes to scour or remove dirt
  • Striking the coil with a tool to dislodge or remove soil or residue
  • Corrosive, caustic or alkaline cleaners (with a pH  5.5 - 8.5) as these may permanently damage the coating and void the warranty

Technical Details & Test Data

Chemical Resistance for Splash
Acid Rating
Sulfuric Acid 5% Excellent
Citric Acid 50% Excellent
Oleic Acid Excellent

 

Miscellaneous Rating
d'Limonene Very Good
Pool Shock 12.5% sodium hypochlorite Excellent
Bleach - 5% sodium hypochlorite Excellent
Water Excellent
Windex w/ ammonia Excellent
Sodium Tetraborate 10% solution Excellent
Wasp and Hornet Killer Spray (aerosol) Excellent
Hydrogen Peroxide 3% Excellent

 

Salts & Bases Rating
Sodium Hydroxide 10% Excellent
Sodium Hydroxide 50% Excellent
Ammonium Hydroxide 10% Excellent
Ammonium Hydroxide 28% Excellent
Sodium Chloride 15% solution Excellent

 

Oils Rating
Dirty Motor Oil Excellent
Motorcraft Brake Fluid Excellent
Skydrol LD - 4 Excellent
10W30 motor oil Excellent

 

Solvents Rating
Mineral Spirits Excellent
WD-40 Excellent
Propylene Glyol Excellent
Ethanol 40% Excellent

Packaging & Availability

Packaging Type
Packaging

ES-606 is available in one-gallon kits. Both Part A and Part B are provided in short-filled cans, allowing for accurate and easy mixing.

Storage & Handling

Storage Conditions
  • Coating should not be stored longer than 1 year from date of manufacture
  • Coating should be stored in a clean, dry environment at 50 - 75°F (10 - 24°C) in original, sealed containers
  • Keep out of direct sunlight
  • Avoid excessive heat and keep from freezing