Intershield 4000USP Passivation-enhanced Primer is a primer. Meets the performance requirements of ISO 12944-6:2018 for zinc-rich systems, achieving extremely high durability in onshore environments. Intershield 4000USP is a high-performance universal primer using passivation-enhanced and alkylamine epoxy technology, combining the synergistic effect of anti-corrosive pigments and unique resin technology. Although the low-molecular-weight reactive co-reactant becomes part of the film when cured under normal ambient conditions, analysis by EPA Method 24 has shown that it also affects the VOC value. Parameters on this page: volume solids 75% ± 2%, dry film thickness 100–200 µm (4–8 mils), theoretical spreading rate 5 m²/L.
Data source: AKZONOBEL original Technical Data Sheet (TDS), "Intershield 4000USP Passivation-enhanced Primer"; spreading rate and other values are converted from the TDS parameters, 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 | 75% ± 2% |
|---|---|
| Dry Film Thickness | 100–200 µm (4–8 mils) |
| Theoretical Spreading Rate | 5 m²/L |
| VOC | 1.89 lb/gal (227 g/L) US EPA Method 24 13… |
| Density / Specific Gravity | 1.59 kg/L (13.3 lb/gal) |
| Number of Components | Two-component |
| Thinner | International GTA220. Do not exceed the thinning limits of local environmental regulations |
| Mixing Ratio | 3 parts : 1 part (by volume) |
| Colour / Appearance | Grey, red, pale yellow, INTERSHIELD |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Intershield 4000USP is a high-performance universal primer using passivation-enhanced and alkylamine epoxy technology, combining the synergistic effect of anti-corrosive pigments and unique resin technology. It cures and can be overcoated quickly even at low temperatures.
A universal primer for anti-corrosion and passive fire protection systems, providing extremely high durability in harsh corrosive environments. Used in newbuilding projects, this primer reduces system complexity and improves application efficiency.
Meets the performance requirements of ISO 12944-6:2018 for zinc-rich systems, achieving extremely high durability in onshore environments.
| Colour | Grey, red, pale yellow, INTERSHIELD |
|---|---|
| Gloss | Semi-gloss 4000USP |
| Volume Solids | 75% ± 2% |
| Typical thickness | Dry film thickness 100–200 µm (4–8 mils), equivalent to wet film thickness 133–267 µm (5.3–10.7 mils) |
| Theoretical Spreading Rate | At 150 µm dry film thickness and the stated volume solids, 5 m²/L; at 6 mil dry film thickness and the stated volume solids, 201 sq ft/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) | 2 h | 5.5 h | 4 h | Unlimited¹ |
| 15°C (59°F) | 60 min | 3.5 h | 3 h | Unlimited¹ |
| 25°C (77°F) | 30 min | 2.5 h | 2 h | Unlimited¹ |
| 40°C (104°F) | 15 min | 60 min | Unlimited¹ | |
¹ Refers to overcoating with an epoxy intermediate coat or epoxy topcoat. With other approved topcoats, the overcoating interval may be reduced; contact International Paint for more information.
| Flash point (typical) | Component A 33 °C (91 °F); Component B 30 °C (86 °F); mixed 31 °C (88 °F) |
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| Product weight | 1.59 kg/L (13.3 lb/gal) |
| Volatile Organic Compounds | 1.89 lb/gal (227 g/L) US EPA Method 24; 139 g/kg EU Solvent Emissions Directive content, Commission Directive 2010/75. Coating hazardous substances: GB 30981.2-S-Pb≤1000-NC compliant with GB 30981.2-2025. For more details, see the "Product Characteristics" section. |
All surfaces to be coated shall be clean, dry and free from contamination. Before painting, all surfaces shall be assessed and prepared in accordance with ISO 8504-1. Where necessary, remove weld spatter and grind welds and sharp edges smooth. Oil and grease shall be removed in accordance with SSPC-SP1 solvent cleaning.
Steel: Intershield 4000USP achieves ideal performance when applied to surfaces prepared to Sa 2½ (ISO 8501-1:2007) or SSPC SP6. Intershield 4000USP must be applied before the steel oxidises. If oxidation does occur, the surface needs to be re-blasted to the specified standard. Surface defects should be ground, filled or treated appropriately.
Recommended angular surface profile of 50–75 µm (2–3 mils).
| Mixing | This product is supplied in two containers as one unit. Always mix the entire unit in the specified ratio. 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) |
| 90 min | 60 min | 30 min |
| Suitable for airless spray | Recommended nozzle tip size 0.43–0.53 mm (17–21 thou); total paint pressure at the nozzle not less than 155 kg/cm² (2204 psi) |
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| Air Spray | Suitable | Spray gun | DeVilbiss MBC or JGA |
| Air nozzle | 704 or 765 | ||
| (with pressure pot) | Spray painting | E | |
| Brush | Suitable | Suitable for small areas and touch-up; multiple coats are required to achieve the dry film thickness |
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| Roller application | Suitable for small areas and touch-up; multiple coats are required to achieve the dry film thickness. |
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| Thinner | International GTA220. Do not exceed the thinning limits of local environmental regulations |
| Cleaner | International GTA822 |
| 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 | Clean all equipment immediately after use with International thinner. Flushing spray equipment periodically during application is recommended. Cleaning frequency depends on the volume sprayed, temperature and time, including all interruptions. |
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Surplus paint and empty containers must be disposed of in accordance with the relevant local regulations.
Intershield 4000USP is designed for use in harsh corrosive environments as part of an approved coating specification, as a substitute for zinc dust materials.
Apply in good weather conditions. The surface to be coated must be at least 3 °C (5 °F) above the dew point. Intershield 4000USP can cure at temperatures as low as -5 °C (23 °F), but application and overcoating should be carried out at 5 °C (41 °F). When applying Intershield 4000USP by brush or roller, multiple coats are necessary to achieve the specified total system dry film thickness.
As with all epoxy systems, the product may chalk and discolour under external exposure. The intercoat adhesion to aged Intershield 4000USP is reduced compared with that to fresh coatings, but still meets the requirements of the intended use.
Excessive film thickness of Intershield 4000USP will extend the minimum overcoating time and handling time, adversely affecting long-term overcoating performance.
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.
The following topcoats and intermediate coats can be applied over Intershield 4000USP: Intergard 475HS; Interseal 670HS; Interthane 990. For more system compatibility recommendations, contact International Paint Protective Coatings.
| 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 | |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 20 L | 26.8 kg | 7.1 kg |
| Shelf life | 12 months at 25 °C (77 °F); 6 months at temperatures above 25 °C (77 °F). Inspect before use thereafter. Store in a dry, cool environment, away from heat sources 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.
