InterH2O 499S Water-borne Epoxy Paint is a water-borne coating. Designed as an anticorrosive primer/intermediate coat for water-borne systems in a wide range of industries. It can be applied directly to metal substrates as a primer, or used as an intermediate coat. As with all epoxy systems, the product may chalk and discolour under exterior exposure; where a durable decorative surface with good gloss and colour retention is required, overcoat with a recommended topcoat. Parameters on this page: dry film thickness 75–160 µm (3–6.4 mils); theoretical spreading rate 3.84 m²/L; number of components: two.
Source: AKZONOBEL original technical data sheet (TDS) 'InterH2O 499S Water-borne Epoxy Paint'. Spreading rate and other values converted from the TDS; for 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 | 48% |
|---|---|
| Dry Film Thickness | 75–160 µm (3–6.4 mils) |
| Theoretical Spreading Rate | 3.84 m²/L |
| VOC | 37 g/L calculated, 76 g/L water-reduced; coating hazard GB 30981.… |
| Density / Specific Gravity | 1.36 kg/L (11.3 lb/gal) |
| Number of Components | Two-component |
| Thinner | Clean water |
| Mixing Ratio | 4 parts : 1 part (by volume) |
| Gloss | Matt |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A two-component, fast-drying water-borne epoxy coating. It can be applied directly to metal substrates as a primer, or used as an intermediate coat.
| Designed as an anticorrosive primer/intermediate coat for water-borne systems in a wide range of industries | Offering high performance. |
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INTERH2O 499S, colours: white, red, black, grey
| Gloss | Matt |
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| Volume Solids | 48% |
| Typical thickness | Dry film thickness 75–160 µm (3–6.4 mils), equivalent to wet film thickness 156–333 µm (6.2–13.3 mils) |
| Theoretical Spreading Rate | At 125 µm dry film thickness and the stated volume solids: 3.84 m²/L; at 5 mils dry film thickness and the stated volume solids: 154 ft²/US gal |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray, air spray, brush and roller. Drying time: recommended topcoat overcoating interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 10°C (50°F) | 60 min | 8 h | 6 months | |
| 15°C (59°F) | 60 min | 6 h | 6 months | |
| 25°C (77°F) | 30 min | 5 h | 6 months | |
| 40°C (104°F) | 30 min | 2 h | 6 months | |
| 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 | 1.36 kg/L (11.3 lb/gal) |
| Volatile Organic Compounds | 37 g/L calculated, 76 g/L water-reduced; coating hazard GB 30981.2-W-Pb≤1000-NC; complies with GB 30981.2-2025. For more details, refer to the 'Product Characteristics' section. |
All steel surfaces to be coated must be clean, dry and free of contamination. Before application, all surfaces must be assessed and prepared in accordance with ISO 8504:2000.
Oil and grease must be removed by solvent cleaning in accordance with SSPC-SP1.
When applying water-borne coatings, strict compliance with all cleanliness standards is essential.
Blasting: blast-clean to Sa 2½ (ISO 8501-1:2007) or SSPC-SP6. If oxidation occurs between blasting and application of InterH2O 499S, re-blast the surface to the specified visual standard.
Surface defects exposed by abrasive blasting must be ground, filled or treated by another suitable method.
Primed surfaces: when applying InterH2O 499S over a primer, only one approved type should be used: see 'System Compatibility' for details. The primer surface must be dry and free of contaminants, and InterH2O 499S must be applied within the specified recoat interval (refer to the relevant product data sheet). Before applying InterH2O 499S, repair damaged areas to the specified standard (e.g. Sa 2½ (ISO 8501-1:2007) or SSPC SP6 blasting).
| 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 | 4 parts : 1 part (by volume) |
| Pot life | 10°C (50°F) | 15°C (59°F) | 25°C (77°F) | 40°C (104°F) |
| 3 h | 2 h | 60 min |
| 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) | Recommended: use suitable dedicated equipment. |
| Brush | Applicable — for small-area repair only |
| Roller application | Applicable — for small-area repair only |
| Thinner | Clean water |
| Cleaner | International GTA991 |
| 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 all equipment immediately after use with International GTA991. Flushing spray equipment periodically during application is also recommended. Cleaning frequency depends on spray volume, temperature and time, including all interruptions. |
Surplus paint and empty containers must be disposed of in accordance with the relevant local regulations.
Apply by air or airless spray. Flush all equipment thoroughly with GTA991 or ethanol, then rinse 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 to achieve the specified film thickness.
As with all water-borne coatings, application conditions must be carefully controlled to ensure good product performance. The following basic requirements must be observed: protect InterH2O 499S from freezing during storage and transport. The recommended storage temperature is 4 °C (39 °F) to 35 °C (95 °F).
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 should be below 80%, otherwise drying and recoat times will be greatly extended. Relative humidity should be above 20%, otherwise satisfactory coalescence may not occur. During application, the air temperature must be kept between 10 °C (50 °F) and 40 °C (104 °F). At around 30 °C (86 °F), good air circulation allows relatively high humidity tolerance. Maintain good air flow around the coated object (minimum air velocity 0.1 m/s (4 in/s), maximum 1 m/s (40 in/s)). Ideal air velocity is 0.3–0.5 m/s (12–20 in/s). In small, hard-to-ventilate areas, use brush application to avoid overspray.
InterH2O 499S should show no viscosity increase even after long mixing. However, if the specified activation time is exceeded, the cured film will have inferior performance and will not reach the specified performance level. Unlike solvent-borne epoxy coatings, the activation time of InterH2O 499S is shorter at low temperature.
Over-application of InterH2O 499S extends the minimum recoat and handling times and adversely affects long-term recoating performance.
As with all epoxy systems, the product may chalk and discolour under exterior exposure. Where a durable decorative finish with good gloss and colour retention is required, apply the recommended topcoat.
Note: VOC values are typical and for guidance only. They may vary with colour and general production tolerances.
Although the low-molecular-weight reactive additive becomes part of the film when cured under normal ambient conditions, analysis by EPA Method 24 shows that it also affects the VOC value.
InterH2O 499S is suitable for application over the following primers:
| Interdur 8800 | Intergard 251 |
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| InterH2O 401 | Interplate 317, Interzinc 52. InterH2O 499S can be recoated with itself or with the following topcoats; |
| Intercryl 520 | InterH2O 699Interthane 990 |
| 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 must be applied at the production site by professional applicators in accordance with the recommendations in this manual, the Material Safety Data Sheet and the instructions on the container label. Do not use this product without first reviewing the Material Safety Data Sheet (MSDS) that International Paint provides for its customers.
All work related to the application and use of this product must be carried out in accordance with the relevant national health, safety and environmental standards and regulations.
If welding or flame cutting is required on metal coated with this product, dust and fumes will be generated; use appropriate personal protective equipment and adequate local ventilation.
If in doubt about the suitability of this product for the intended use, consult AkzoNobel for further advice.
| Packaging Specifications | Component A | Component B | ||
| Volume | Packaging | Volume | Packaging | |
| 20 L | 16 L | 20 L | 4 L | 5 L |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 20 L | 24.64 kg | 4.7 kg |
| Shelf life | 9 months at 25 °C (77 °F); inspect thereafter. Store in a dry, cool environment away from heat and ignition sources. Always avoid freezing during storage. |
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Information is subject to the manufacturer's latest version; the manufacturer's latest TDS prevails.
The technical parameters on this page are taken from the product's original manufacturer technical datasheet, the copyright of which belongs to the manufacturer. If a rights holder considers the presentation inappropriate, contact us for verification and handling.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
