Interdur 8860 is a polyurethane coating used as a topcoat. Suitable as a topcoat for new construction and for maintenance, widely used in various environmental conditions, including offshore structures, chemical and petrochemical plants, bridges, paper mills and the power industry. A two-component acrylic polyurethane topcoat with excellent durability and long-term recoatability. Where severe chemical or solvent spillage may occur, contact International Protective Coatings for information on suitability. Parameters on this page: volume solids 57% ± 3% (depending on colour), dry film thickness 50–75 µm (2–3 mil), theoretical spreading rate 11.40 m²/L.
Parameter source: AKZONOBEL manufacturer's Technical Data Sheet (TDS) "Interdur 8860 Polyurethane Topcoat"; values such as spreading rate are converted from TDS parameters and are for product 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 | 57% ± 3% (depending on colour) |
|---|---|
| Dry Film Thickness | 50–75 µm (2–3 mils) |
| Theoretical Spreading Rate | 11.40 m²/L |
| VOC | 3.50 lb/gal (420 g/L) US Environmental Protection Agency Method 24 341… |
| Density / Specific Gravity | 1.21 kg/L (10.1 lb/gal) |
| Number of Components | Two-component |
| Thinner | Do not exceed the thinning limits of local environmental regulations |
| Mixing Ratio | 6 parts : 1 part (by volume) |
| Gloss | High gloss |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A two-component acrylic polyurethane topcoat with excellent durability and long-term recoatability.
Suitable as a new-construction and maintenance topcoat, widely used in various environments, including offshore structures, chemical and petrochemical plants, bridges, paper mills and the power industry.
8860
| Gloss | High gloss |
|---|---|
| Volume Solids | 57% ± 3% (depending on colour) |
| Typical thickness | DFT 50–75 µm (2–3 mil) corresponds to WFT 88–132 µm (3.5–5.3 mil) |
| Theoretical Spreading Rate | 11.40 m²/L at 50 µm dry film thickness and the stated volume solids; 457 ft²/US gal at 2 mil dry film thickness and the stated volume solids |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray, air spray, brush, conventional spray and roller. Drying time: recommended topcoat overcoating interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 5°C (41°F) | 5 h | 24 h | Unlimited¹ | |
| 15°C (59°F) | 150 min | 10 h | Unlimited¹ | |
| 25°C (77°F) | 90 min | 6 h | Unlimited¹ | |
| 40°C (104°F) | 60 min | 3 h | Unlimited¹ | |
¹ See Definitions and Abbreviations from the International Paint Protective Coatings division.
| Flash point (typical) | Component A 34 °C (93 °F); Component B 49 °C (120 °F); mixed 35 °C (95 °F) |
|---|---|
| Product weight | 1.21 kg/L (10.1 lb/gal) |
| Volatile Organic Compounds | 3.50 lb/gal (420 g/L) US Environmental Protection Agency Method 24 341 g/kg EU Solvent Emissions Directive content 398 g/L China national standard GB 23985 coating hazard GB 30981.2-S-Pb≤90-C complies with GB 30981.2-2025. For further details, refer to the "Product Characteristics" section. |
All surfaces to be coated must be clean, dry and free of contamination. Before painting, all surfaces must be assessed and prepared in accordance with GB 18839-2002.
Primed surfaces: Interdur 8860 is suitable for application over recommended anticorrosive coating surfaces; the primer surface should be dry and free from any contaminants. Interdur 8860 must be applied within the specified recoat interval (see the relevant product Data Sheet).
Damaged areas should be prepared to the specified grade (e.g. abrasive blast cleaning Sa2.5 (GB8923-1:1998) or SSPC SP11, power tool cleaning), and a repair primer should be applied prior to application of Interdur 8860.
| 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 | 6 parts : 1 part (by volume) |
|---|
| Pot life | 5°C (41°F) | 15°C (59°F) | 25°C (77°F) | 40°C (104°F) |
| 12 h | 4 h | 2 h | 45 min |
| Suitable for airless spray | Recommended: nozzle diameter 0.33–0.45 mm (13–18 thousandths of an inch); total paint pressure at the nozzle not less than 155 kg/cm² (2204 psi) |
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| Air Spray | Recommended | Spray gun | DeVilbiss MBC or JGA |
| Air nozzle | 704 or 765 | ||
| (with pressure pot) | Spray painting | E | |
| Air spray (conventional) | Recommended | Use suitable dedicated equipment. | |
| Brush | Suitable | Typical thickness 40–50 µm (1.6–2.0 mils) | |
| Roller application | Suitable | Typical thickness 40–50 µm (1.6–2.0 mils) | |
| Thinner | International GTA713 | Do not exceed the thinning limits of local environmental regulations |
(or International GTA733 or GTA056)
| Cleaner | International GTA713 (or International GTA733 or GTA056) |
|---|---|
| Interruption of work | Do not leave paint in hoses, spray guns or spray equipment. Flush all equipment thoroughly with International thinner. |
Once mixed, paint should not be resealed. If work is interrupted for too long, mix a fresh batch 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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All surplus paint and empty containers must be disposed of in accordance with the relevant local laws/regulations.
Gloss and surface evenness depend on the application method. Avoid mixing different application methods as far as possible.
Conventional air spray generally gives ideal gloss and appearance.
When applied by brush and roller, certain colours may require two coats of Interdur 8860 to achieve uniform coverage, particularly over dark-coloured primers or with certain lead-free bright colours such as yellow and orange. Ideally, a colour-matched intermediate coat or anticorrosive coat should be used beneath Interdur 8860.
When recoating after weathering or ageing, ensure the coating has been thoroughly cleaned and all surface contaminants such as oil, grease, crystalline salts and road grime have been removed before application of subsequent Interdur 8860 coats.
Intercoat adhesion over aged Interdur 8860 is somewhat lower than over a new coating, but still meets the requirements of the specified application.
This product may be thinned only with the recommended International thinner. Other thinners, especially alcohol-containing thinners, severely inhibit the curing mechanism of the coating.
The temperature of the surface to be coated must be at least 3 °C (5 °F) above the dew point.
Ensure adequate ventilation when applying Interdur 8860 in confined spaces.
Interdur 8860 can cure at temperatures below 0°C (32°F). However, the product should not be applied at 0°C (32°F) because ice may be present on the substrate. Condensation on the surface during or after application results in a flat finish and a poor-quality film. Premature exposure to standing water may cause colour change, particularly with dark-coloured coatings and under low-temperature conditions.
This product is not recommended for immersion service. If severe chemical or solvent splashes are likely, contact International Paint for information on suitability.
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 primers/intermediate coats are recommended for Interdur 8860:
| Interdur 8800 | Interdur 8809 |
|---|---|
| Interdur 8801 | Interdur 8814 |
| Interdur 8802 | Interdur 8815 |
| Interdur 8808 | Interdur 8840 |
| Interdur 8810 | Interdur 8844. Interdur 8860 is suitable for recoating over itself. |
For other suitable primers/intermediate coats, consult International Paint.
| 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.
Warning: contains isocyanates. Wear an air-fed helmet when spraying.
| Packaging Specifications | Component A | Component B | ||
| Volume | Packaging | Volume | Packaging | |
| 20 L | 17.14 L | 20 L | 2.86 L | 5 L |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 20 L | 23.1 kg | 3.5 kg |
| Shelf life | Minimum 24 months (Component A) and 12 months (Component B) at 25 °C (77 °F), after which inspection is required. Store in a dry, cool place away from heat sources and ignition sources. |
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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.
