Intercure 420 Fast-curing Epoxy Resin Paint is an epoxy coating. The addition of flake micaceous iron oxide pigment enhances the barrier effect and improves long-term recoatability, making it ideal for application in the fabrication shop before shipment and final recoating on site. A two-component, high-solids, low-VOC micaceous iron oxide coating formulated with dedicated polymer technology for fast curing and recoating even at low temperature. Low-temperature curing: Intercure 420 cures below 0 °C (32 °F). Parameters on this page: dry film thickness 100–150 µm (4–6 mils); theoretical spreading rate 5.60 m²/L; number of components: two.
Source: AKZONOBEL original technical data sheet (TDS) 'Intercure 420 Fast-curing Epoxy Resin 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 | 70% |
|---|---|
| Dry Film Thickness | 100–150 µm (4–6 mils) |
| Theoretical Spreading Rate | 5.60 m²/L |
| VOC | 2.75 lb/gal (330 g/L), US EPA Method 24, 20… |
| Density / Specific Gravity | 1.63 kg/L (13.6 lb/gal) |
| Number of Components | Two-component |
| Thinner | Normally no thinning is required |
| Mixing Ratio | 3 parts : 1 part (by volume) |
| Colour / Appearance | Natural micaceous iron oxide, silver-grey, light grey, INTERCURE 420 |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A two-component, high-solids, low-VOC micaceous iron oxide coating formulated with dedicated polymer technology that cures and overcoats rapidly even at low temperatures.
As a high-build intermediate coat and part of a high-performance coating system, it provides excellent barrier protection and is suitable for various aggressive environments, including offshore installations, bridges, chemical and petrochemical plants, power stations, paper mills and industrial buildings.
May be applied directly as a barrier coating on steel in non-aggressive environments.
The incorporation of lamellar micaceous iron oxide pigment enhances the barrier effect and the long-term overcoatability of the coating system, making the product ideal for application at the fabrication shop before shipment and final overcoating on site.
The fast curing and recoating of Intercure 420 provides production flexibility, making it suitable for new construction and on-site maintenance.
| Colour | Natural micaceous iron oxide, silver-grey, light grey, INTERCURE 420 |
|---|---|
| Gloss | Matt |
| Volume Solids | 70% |
| Typical thickness | Dry film 100–150 µm (4–6 mils), equivalent to wet film 143–214 µm (5.7–8.6 mils) |
| Theoretical Spreading Rate | At 125 µm dry film thickness and the stated volume solids: 5.60 m²/L; at 5 mils dry film thickness and the stated volume solids: 225 ft²/US gal |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray, air spray, brush, roller. Drying time; recommended topcoat recoat interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 5°C (41°F) | 75 min | 7 h | 5 h | Unlimited¹ |
| 15°C (59°F) | 50 min | 4 h | 3 h | Unlimited¹ |
| 25°C (77°F) | 40 min | 2 h | Unlimited¹ | |
| 40°C (104°F) | 30 min | 1 h | Unlimited¹ | |
¹ See Definitions and Abbreviations from the International Paint Protective Coatings division.
| Flash point (typical) | Component A 29 °C (84 °F); Component B 26 °C (79 °F); mixed 27 °C (81 °F) |
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| Product weight | 1.63 kg/L (13.6 lb/gal) |
| Volatile Organic Compounds | 2.75 lb/gal (330 g/L), US EPA Method 24; 201 g/kg, EU Solvent Emissions Directive (Council Directive 2010/75/EU); 292 g/L, Chinese national standard GB 23985; coating hazard GB 30981.2-S-Pb≤1000-NC; complies with GB 30981.2-2025. For more details, refer to the 'Product Characteristics' section. |
All surfaces to be coated must be clean, dry and free of contaminants. Before application, all surfaces must be assessed and prepared in accordance with ISO 8504:2019.
Oil and grease must be removed in accordance with the SSPC-SP1 solvent cleaning standard.
Blasting: blast-clean with steel grit to Sa 2½ (ISO 8501-1:2007) or SSPC-SP6. If oxidation occurs between blasting and application of Intercure 420, re-blast the surface to the specified visual standard.
Surface defects exposed by blast cleaning must be ground, filled or treated by a suitable method.
Recommended angular surface profile of 50–75 µm (2–3 mils).
Primed surfaces: all suitable primers used beneath Intercure 420 should be applied over surfaces blast-cleaned with steel grit to Sa 2½ (ISO 8501-1:2007) or SSPC-SP6.
Shop-primed substrates: blast-clean welds and damaged areas with steel grit to Sa 2½ (ISO 8501-1:2007) or SSPC SP6.
If the shop primer shows extensive or scattered breakdown, a full sweep blast may be required.
If the shop primer was applied over shot-blasted surfaces, a full sweep blast with steel grit is required before applying Intercure 420.
Zinc-rich primed substrates: before applying Intercure 420, ensure the primer surface is clean, dry and free of contaminants and zinc salts. Ensure the zinc-rich primer is fully cured before recoating.
If the zinc-rich primer was applied over steel-shot-blasted surfaces, a full sweep blast is required before applying Intercure 420.
| Mixing | This product is supplied in two containers forming one unit. Mix the two components in the specified ratio in one operation. Once mixed, use within the specified pot life. |
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(1) Stir the base (Component A) with a power mixer.
(2) Mix all of the curing agent (Component B) with the base (Component A) and stir thoroughly with a power mixer.
| Mixing ratio | 3 parts : 1 part (by volume) |
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| Pot life | 5°C (41°F) | 15°C (59°F) | 25°C (77°F) | 40°C (104°F) |
| 8 h | 4 h | 2 h | 45 min |
| Suitable for airless spray | Recommended: nozzle diameter 0.43–0.53 mm (17–21 thousandths of an inch); total paint pressure at the nozzle not less than 176 kg/cm² (2503 psi) |
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| Air Spray | Recommended | Spray gun | DeVilbiss MBC or JGA |
| Air nozzle | 704 or 765 | ||
| (with pressure pot) | Nozzle | E | |
| Brush | Applicable — for small-area repair only | Typical thickness 75 µm (3.0 mils) | |
| Roller application | Applicable — for small-area repair only | Typical thickness 50–75 µm (2.0–3.0 mils) | |
| Thinner | International GTA220 | Normally no thinning is required. |
(or International. In extreme cases, consult the local technical representative.
GTA415). Do not thin beyond the requirements of local environmental regulations.
| Cleaner | International GTA822 (or International GTA415) |
|---|---|
| Interruption of work | Do not leave paint in hoses, spray guns or spray equipment. Flush all equipment thoroughly with International thinner. |
Mixed paint should not be resealed. If work is interrupted for too long, mix a fresh batch of paint for application.
| Cleaning | All equipment should be cleaned immediately after use with International thinner. Flushing spray equipment periodically during daily work is good practice. Cleaning frequency depends on the volume sprayed, temperature, spraying time, including interruptions, and other factors. |
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Surplus paint and empty containers must be disposed of in accordance with the relevant regional regulations.
Low-temperature curing: Intercure 420 cures below 0 °C (32 °F). However, it should not be applied at 0 °C (32 °F) because ice may be present on the substrate.
For details of curing times and recoatability, contact International Paint.
This product must be thinned only with the recommended International thinner. Other thinners, especially those containing ketones, severely inhibit the curing of the coating.
The temperature of the surface to be coated must be at least 3 °C (5 °F) above the dew point.
Like all epoxy resin paints, Intercure 420 chalks and fades when exposed to the atmosphere. However, this does not affect the anticorrosive performance.
This product is generally used as a transport protection coating before on-site recoating. To ensure maximum recoatability, avoid over-application and keep the surface completely clean and free of contaminants, which may lodge in the profile because of the rough nature of the mica iron oxide pigment.
As with all products with a high micaceous iron oxide content, only darker colours can be formulated; therefore, when using thin-film topcoats in certain colours, two coats may be required to achieve good hiding.
Intercoat adhesion over aged Intercure 420 is lower than over fresh coating, but still adequate for the specified use.
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.
Consult International Paint for specific information on the application of pre-construction primers.
The following primers can be used with Intercure 420: Intercure 200, Intergard 251, Intergard 269, Interzinc 22 *(a mist coat or tie coat may be required), Interzinc 52, Interzinc 315. The following topcoats are recommended for use with Intercure 420: Interfine 629HS, Intergard 740, Interthane 990. For other suitable primers/topcoats, consult International Industrial Coatings.
For details, see the relevant product data sheet
| 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 | 15 L | 20 L | 5 L | |
| 4 US gal | 3 US gal | 5 US gal | 1 US gal | |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 20 L | 29.5 kg | 5.2 kg |
| 4 US gal | 49.4 lb | 8.8 lb |
| Shelf life | At least 12 months at 25 °C (77 °F). Thereafter, inspection is required. Store in a dry, cool environment away from heat and sources of ignition. |
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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.
