Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
Applications & Uses
- Applications
- Application Area
- Application Method
- Cure Method
- Coating Type
- Recommended Uses
Heresite’s HereShield is a direct-to-metal high-performance coating specially formulated for marine / saltwater environments and used principally to protect heat transfer equipment and components.
- Thinners and Cleanup
No thinning is required for this material. Agitating will cause coating to become thinner in viscosity. If required to thin beyond normal viscosity range, Type IV Deionized water can be used in small amounts (ASTM D1193). Deionized water can be used to clean up wet coating material, followed by acetone for residual material.
- Coverage
Theoretical coverage is approximately 400 square feet per gallon per 1 dry mil (approximately 10 square meters per 1 liter per 25 microns). Coverage rates are estimates and make no allowance for material loss. Actual rates will vary dependent on application method, surfaces, etc.
- Curing/Drying
Air dry:
Coil should be dry to touch within 5 hours of final application at ambient temperatures of 68 - 77°F (20 - 25°C). Warmer temperatures will enhance drying time; cooler temperatures will lengthen the drying time. Coil should be dry to handle after 48 hours at ambient temperatures.
- Surface Preparation
All surfaces must be clean, sound, and free of any oils, dirt, grease, wax and any other contamination that may interfere with coating adhesion. In general, for new construction, the surface should be prepared with a neutral (pH of 8-9) solventized heavy duty cleaner followed by a thorough hot water rinse. Cleaners that leave little to no residue on the final surface are best. All surfaces must be dry and free of residue or debris prior to application of coating.
Previously Painted Metal Surfaces: Remove all loose coatings, rust, and corrosion by scraping, sanding, or sandblasting. In cases where there is a large amount of contamination, a commercial blast is acceptable in accordance with NACE #3, SSPC-SP-6 or Sa2 specifications.
- Thinning
No thinning is required for this material. Agitating will cause coating to become thinner in viscosity. If required to thin beyond normal viscosity range, Type IV Deionized water can be used in small amounts (ASTM D1193).
- Spray Application for Heat Transfer Equipment
- Do not apply if the temperature is less than 5°F (3°C) above the dew point, or if the temperature is below 45°F (7°C)
- Use standard production type spray equipment
- Agitate coating briefly with an appropriately sized stirring knife or spatula until no settle is seen at the base of the agitating utensil and the surface looks homogenous. A slow speed paddle/power mixer may be used in larger storage vessels or as needed. Overagitation may result in generation of foam. Draw material from the bottom of the coating containment vessel
- NON-DEDICATED EQUIPMENT: There is special processing required to use water-based coatings in solvent-based equipment. This process ensures no residual solvent interferes with HereShield. When finished spraying water-based coating, reverse steps (flush with water, then intermediate solvent, then acetone) to revert to solvent-based equipment
- Clean the spray gun thoroughly with acetone or solvent compatible with previous coating (anywhere the coating touches)
- Flush the equipment with at least a pint of either EB solvent (Butyl Cellosolve) or IPA (isopropyl alcohol) until the lines run clear
- Wipe down the spray equipment to remove some of the solvent
- Flush the lines with at least a pint (0.475 liters) of deionized water
- The spray gun is now set up to spray HereShield
- Air supply must be uncontaminated. Adjust air pressure to approximately 50 PSI (3.5 bar) at the gun and provide approximately 50 PSI (3.5 bar) at pressure pot. Adjust spray gun by first opening liquid valve and then adjust air valve to give approximately an 8"–12" fan (20-30 centimeters), holding gun perpendicular to the surface at a distance of 12" (30 centimeters)
- Allow to flash off between passes for approximately one minute, but do not allow film to dry completely
- Coils shall be coated on both sides of fins (outside and inside)
- Moving spray gun slowly — each coat consists of 3 spray passes: (1) straight into fins; (2) on 70-degree angle to right; (3) on 70-degree angle to left — on both sides of coil. These three spray passes are considered ONE coat — make sure to allow 15 minutes dry time between passes to avoid runs/sags
- HereShield may be recoated with itself after 30 minutes
- When finished, clean equipment with deionized water until water runs clear
- Allow HereShield to air-dry for a minimum of 24 hours of before assembly
- Check dry by twisting thumb while applying pressure to paint. If HereShield appears to move under pressure, let dry further and recheck. HereShield is dry enough if you do not leave a thumbprint in the paint
- Temperature and humidity can dramatically impact drying times
- Temperature and humidity can dramatically impact drying 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
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Bend Test (3.0 mm) | No Cracks or Delamination | - | - |
| Crosshatch Adhesion | 5B | - | ASTM D3359 |
| Cyclic Offshore Testing | 4200 | h | ISO12944 - 8 |
| Dry Film Thickness | 0.8 - 1.2 | mils | - |
| Film Thickness (Dry) | 0.8 - 1.2 | mils | - |
| Film Thickness (Wet) | 3.0 - 5.0 | mils | - |
| Flash Point | 212 | °F | - |
| Heat Transfer Reduction | max.1 | % | - |
| Humidity | 5000 | h | ASTM D4585 |
| Impact Resistance (Direct) | 50 | inch - pounds | ASTM D2794-93 |
| Impact Resistance (Indirect) | 50 | inch - pounds | ASTM D2794-93 |
| Pencil Hardness | 2B | - | ASTM D3363 |
| QUV Resistance | 2000 | h | ASTM D4587 |
| Salt Spray | 15000 | h | ASTM B117 |
| Solids by Volume | 22 - 28 | % | - |
| Solids by Weight | 27 - 33 | % | ASTM D2369 |
| UV-C Resistance | 1500 | h | - |
| Viscosity | 50 - 70 | s | Zahn #2 EZ cup |
| VOC Content | 1 | lb./gal. | - |
Technical Details & Test Data
- Chemical Resistance
HereShield is splash resistant to a range of acids and inorganic salts.
- Chemical Resistance for Splash
Acid Rating Sulfuric Acid 5% Excellent Sulfuric Acid 10% Very Good Citric Acid 50% Excellent Hydrochloric Acid 5% Very Good Hydrochloric Acid 10% Good Miscellaneous Rating Bleach- 5% sodium
hypochloriteExcellent Pool Shock 12.5% sodium hypochlorite Very Good Water Excellent Windex w/ ammonia Excellent Sodium Tetraborate 10% solution Good Wasp and Hornet Killer Spray (aerosol) Excellent Hydrogen Peroxide 3% Excellent Salts & Bases Rating Sodium Hydroxide 10% Excellent Sodium Hydroxide 50% Excellent Ammonium Hydroxide 28% Excellent Sodium Chloride 15% solution Excellent Oils Rating Dirty Motor Oil Excellent Motorcraft Brake Fluid Good 10W30 motor oil Excellent Solvents Rating MEK Very Good Mineral Spirits Excellent WD-40 Excellent Propylene Glyol Excellent Acetone Very Good Ethanol 40% Very Good PM Solvent Excellent Isopropyl Alcohol Very Good Xylene Good
Packaging & Availability
- Packaging
HereShield is available in one-gallon (3.8 liter) and fivegallon (18.9 liter) quantities.
Storage & Handling
- Shelf Life
- 2 Years
- Storage Conditions
Coating should not be stored longer than 2 years 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. Product may be shipped with freeze indicator, which indicates only that risk temperatures were reached; coating may still be usable. Call Heresite if freeze indicators are activated prior to opening shipment.