InterH2O 499 FWA500 Series Waterborne Epoxy Primer is a waterborne coating used as a primer. Fast drying and long-term recoatability make it ideal for new construction. The very low solvent content complies with all current and planned VOC regulations. Good air flow must be maintained around the coated object [minimum air velocity 0.1 m/s (4 in/s), maximum 1 m/s (40 in/s)]. Parameters on this page: dry film thickness 75–180 µm (3–7.2 mil), theoretical spreading rate 3.71 m²/L, number of components two.
Source: AkzoNobel original technical data sheet (TDS) "InterH2O 499 FWA500 Series Waterborne Epoxy Primer"; spreading rate and other values are converted from TDS parameters and are for selection reference only.
The above content is compiled from the manufacturer's datasheet and this site's parameter tables. For selection, coating systems and lead times, pleaseContact Usfor confirmation.
This page carries the full TDS for this product, translated from the manufacturer's original document. No file download is needed; for an original-language copy, send an enquiry.
| Volume Solids | 52% |
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| Dry Film Thickness | 75–180 µm (3–7.2 mil) |
| Theoretical Spreading Rate | 3.71 m²/L |
| VOC | 67 g/kg. EU Solvent Emissions Directive (Council Directi… |
| Density / Specific Gravity | 1.385 kg/L (11.6 lb/gal) |
| Number of Components | Two-component |
| Thinner | Clean potable water. Maximum thinning 5% (by volume) |
| Mixing Ratio | 9 parts : 1 part (by volume) |
| Drying Time | Obtained at 50% humidity and 0.2 m/s |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A two-component, high-performance, fast-drying epoxy waterborne coating. Suitable as a primer or intermediate coat applied directly to metal. The very low solvent content complies with all current and planned VOC regulations.
As a high-build anticorrosive primer/intermediate coat, suitable for non-immersed steel structures; coating systems containing InterH2O 499 FWA500 Series in waterborne systems provide high performance in harsh environments across a wide range of industries, including commercial infrastructure, petrochemical, power, chemical and processing industries.
Fast drying and long-term recoatability make it ideal for new construction.
INTERH2O colours: red, grey, white. 499 FWA500 SERIES. Gloss: matt
| Volume Solids | 52% |
|---|---|
| Typical thickness | Dry film 75–180 µm (3–7.2 mil), equivalent to wet film 144–346 µm (5.8–13.8 mil) |
| Theoretical Spreading Rate | At 140 µm dry film thickness and the stated volume solids, 3.71 m²/L; at 5.6 mil dry film thickness and the stated volume solids, 149 ft²/US gal |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray, brush, roller. Drying time; recommended topcoat recoat interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 10°C (50°F) | 1 h | 8 h | 6 months | |
| 15°C (59°F) | 1 h | 6 h | 6 months | |
| 25°C (77°F) | 30 min | 5 h | 6 months | |
| 40°C (104°F) | 30 min | 2 h | 6 months | |
Drying times are obtained at 50% humidity and 0.2 m/s. Recoat intervals vary greatly with film thickness, humidity and, in some cases, air flow. Refer to the InterH2O 499 FWA500 Series application guide for more information.
| Flash point (typical) | Component A >100 °C (>212 °F); Component B >100 °C (>212 °F); mixed >100 °C (>212 °F) |
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| Product weight | 1.385 kg/L (11.6 lb/gal) |
| Volatile Organic Compounds | 67 g/kg. EU Solvent Emissions Directive (Council Directive 2010/75/EU). 19 g/L. Chinese national standard GB/T 23985-2009. Coating hazards: GB 30981.2-W-Pb≤1000-NC. Complies with GB 30981.2-2025. For further details, see the "Product Characteristics" section. |
All surfaces to be coated must be clean and free of contamination. Before application, all surfaces must be assessed and prepared in accordance with ISO 8504:2000.
Where necessary, remove weld spatter and grind welds and sharp edges smooth. Oil and grease must be removed in accordance with the SSPC-SP1 solvent cleaning standard.
Strict compliance with all cleaning standards is critical for the application of waterborne coatings.
Steel substrates: blast clean to Sa 2½ (ISO 8501-1:2007) or SSPC-SP6. If oxidation occurs between blasting and application of InterH2O 499 FWA500 Series, re-blast to the specified visual standard.
Surface defects exposed by abrasive blasting must be ground, filled or treated by another suitable method.
Peeled, damaged and similar areas shall be prepared to the specified standard (e.g. Sa 2½ (ISO 8501-1:2007) or SSPC-SP6 blast, or SSPC-SP11 manual/power tool), and primed before applying InterH2O 499 FWA500 Series.
Stainless steel/aluminium: before application, ensure the surface is clean, dry and free from metal corrosion products. Blast or sweep with non-metallic, chloride-free abrasive to form a surface profile.
Primed surfaces: InterH2O 499 FWA500 Series may be applied over anticorrosive primers. The primer surface shall be dry and free from any contaminants; InterH2O 499 FWA500 Series must be applied within the appropriate recoat time (refer to the relevant product data sheet). Before applying InterH2O 499 FWA500 Series, damaged areas shall be prepared to the specified standard (e.g. Sa 2½ (ISO 8501-1:2007) or SSPC SP6 blast).
| Mixing | This product is supplied in two containers as one unit. Mix the two components in the specified ratio in one operation, and use within the specified pot life. |
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| Mixing ratio | 9 parts : 1 part (by volume) |
| Pot life | 10°C (50°F) | 15°C (59°F) | 25°C (77°F) | 40°C (104°F) |
| 6 h | 3 h | 2 h |
| Suitable for airless spray | Recommended: nozzle diameter 0.38–0.53 mm (15–21 thousandths of an inch); total paint pressure at the nozzle not less than 176 kg/cm² (2503 psi) |
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| Air spray (conventional) | Suitable | Spray gun | DeVilbiss MBC or JGA |
| Air nozzle | 704 or 765 | ||
| Nozzle | E | ||
| Brush | Suitable for small areas | Typical thickness 50–75 µm (2.0–3.0 mils) | |
| Roller application | Suitable for small areas | Typical thickness 50 µm (2.0 mil) |
| Thinner | Clean potable water. Maximum thinning 5% (by volume) |
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| Cleaner | International GTA991 (or select a cleaning agent complying with local regulations. For specific use advice, consult the local representative). |
| Interruption of work | Do not leave paint in hoses, spray guns or spray equipment. Flush all equipment thoroughly with clean potable water together with International GTA991. Mixed paint should not be re-sealed. If work is interrupted for a long period, use freshly mixed paint when work resumes. |
| Cleaning | Clean equipment thoroughly immediately after use with clean water and GTA 991. Flushing spray equipment periodically during application is recommended. Cleaning frequency depends on the volume sprayed, temperature and time, including all interruptions. |
Surplus paint and empty containers must be disposed of in accordance with the relevant regional regulations.
Apply by air or airless spray. Flush equipment thoroughly with GTA991 or ethanol, then clean with water before applying the coating. For maximum edge protection and film thickness, airless or air spray is recommended. Other application methods, such as brush or roller, may require more than one coat and should be limited to local areas.
As with all water-borne coatings, application conditions must be carefully controlled to ensure good performance.
The following basic requirements must be followed:
| InterH2O 499 FWA500 Series | Freezing must always be prevented during storage and transport. Recommended storage temperature between 10 °C (50 °F) and 35 °C (95 °F). |
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During application, the steel surface temperature must not be below 10 °C, and must be at least 3 °C above the dew point.
Relative humidity shall be below 85%, otherwise drying and recoat times will be severely extended. Relative humidity shall be above 20%, otherwise film formation may be affected. During application, the air temperature must be maintained between 10 °C (50 °F) and 40 °C (104 °F) for a suitable coating.
At temperatures of about 30 °C (86 °F), good air flow can tolerate relatively higher humidity.
Good air flow must be maintained around the coated object [minimum air velocity 0.1 m/s (4 in/s), maximum 1 m/s (40 in/s)]. Ideal air velocity 0.3–0.5 m/s (12–20 in/s).
Some small areas that are difficult to ventilate shall be applied by brush to avoid overspray.
InterH2O 499 FWA500 Series should not increase in viscosity even after a long mixing time. However, if the specified pot life is exceeded, the cured film has poorer performance and does not reach the specified performance grade.
Over-thick application of InterH2O 499 FWA500 Series extends the minimum recoat and handling times, adversely affecting long-term recoatability.
As with all epoxy coatings, InterH2O 499 FWA500 Series chalks and fades on exposure to the atmosphere. This does not affect anti-corrosion performance.
For durable decorative surfaces requiring good gloss and colour retention, overcoat with the recommended topcoat.
Note: VOC values are typical and for guidance only. They may vary with colour and general production tolerances.
InterH2O 499 FWA500 Series shall be applied on correctly prepared substrate surfaces.
Suitable primers are: InterH2O 499 FWA500 Series, Interzinc 52E. Suitable topcoats are: InterH2O 699 PA Series. Contact the local representative for more information.
| For further information on the industry standards, terms and abbreviations used in this datasheet, see www.international-pc.com | In the following documents on the website: • Definitions and abbreviations • Surface preparation • Coating application • Theoretical and practical spreading rate. These sections are also available as separate publications on request. |
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This product is intended for professional applicators in industrial use only.
All work, including the application and use of this product, must comply with the relevant national standards, laws and regulations on safety, health and environmental protection.
During application and the subsequent drying period (for common drying times, see the product data sheet), provide adequate ventilation to keep solvent concentrations within safe limits and prevent fire and explosion. Forced ventilation is required in confined spaces. During application and drying, personal ventilation and respiratory protection (e.g. air-fed hood or suitable filter mask) must also be provided.
Take the necessary measures to prevent skin and eye contact with the coating (e.g. protective clothing, gloves, goggles, mask, barrier cream).
Before use, read and follow the Material Safety Data Sheet and the Health and Safety section of the application procedure for this product (for two-component coatings, those of the base and curing agent).
If welding or cutting is performed on metal substrate previously coated with this product, dust and fumes will be released; use suitable personal protective equipment and local exhaust ventilation.
The specific safety measures depend on the application method and working environment. If these warnings or instructions are not fully understood or cannot be strictly observed, do not use the product and consult International Paint.
Warning: this product contains liquid epoxy and modified polyamines and may cause skin sensitisation if handled improperly.
| Packaging Specifications | Component A | Component B | ||
| Volume | Packaging | Volume | Packaging | |
| 19 L | 17.1 L | 20 L | 1.9 L | 5 L |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 19 L | 26.26 kg | 2.38 kg |
| Shelf life | 12 months at 25 °C (77 °F). Inspection required thereafter. Store in a dry, cool environment, away from heat sources and sources of ignition. InterH2O 499 FWA500 Series must always be protected from freezing during storage and transport. Recommended storage temperature between 10 °C (50 °F) and 35 °C (95 °F). |
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The information given in this product data sheet is not exhaustive. Anyone who uses, for any purpose, any product other than those specifically recommended in this data sheet without first obtaining our written confirmation does so at their own risk as regards the suitability of the product for the intended purpose. Although to the best of our knowledge all advice or statements given about the product (whether in this data sheet or otherwise) are correct, we cannot control the quality or condition of the substrate, nor the many factors affecting the use and application of the product. Accordingly, unless we specifically agree otherwise in writing, we accept no liability, to the maximum extent permitted by law, for any product performance problem arising, or for any loss or damage caused by use of the product. We hereby disclaim any warranty or representation, express or implied, arising by operation of law or otherwise, including but not limited to any implied warranty of merchantability or fitness for a particular purpose. All products supplied and all technical guidance provided are subject to our standard terms and conditions of sale. You should obtain a copy of this document and read it carefully. The information contained in this product data sheet may be amended at any time in the light of experience and of our product development policy. Before using the product, it is the customer's responsibility to check with the local representative that the data sheet in their possession is the latest version.
This product data sheet is available on www.international-marine.com or www.international-pc.com and should be identical to this copy. If the version on the website differs from this one, the version on the website shall prevail.
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Data is subject to the manufacturer's latest version; in all cases the manufacturer's latest TDS prevails.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
