Interdur 8840 high-build epoxy coating is an epoxy coating. As a high-build epoxy coating, it is used in various environments such as offshore structures, petrochemical plants, paper mills and bridges to enhance the barrier protection of various anti-corrosive coating systems. It is available with conventional pigments, or with micaceous iron oxide as pigment to improve recoatability. Although low-molecular-weight reactive additives cure into part of the film under normal ambient conditions, analysis by EPA Method 24 shows that they also affect the VOC value. Parameters on this page: dry film thickness 100–200 µm (4–8 mil), theoretical spreading rate 6.40 m²/L, number of components: two-component.
Parameter source: AKZONOBEL manufacturer's Technical Data Sheet (TDS) "Interdur 8840 high-build epoxy coating"; 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 | 80% |
|---|---|
| Dry Film Thickness | 100–200 µm (4–8 mils) |
| Theoretical Spreading Rate | 6.40 m²/L |
| VOC | 1.72 lb/gal (207 g/L) US EPA Method 24, 92… |
| Density / Specific Gravity | — |
| Number of Components | Two-component |
| Thinner | Normally no thinning is required |
| Mixing Ratio | 3 parts : 1 part (by volume) |
| Gloss | Matt |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A low-VOC, high-solids, two-component high-build epoxy coating. Available with conventional pigments, or with micaceous iron oxide pigment to enhance overcoating performance.
As a high-build epoxy coating for various environments, such as offshore structures, petrochemical plants, paper mills and bridges, improving the barrier protection of various anticorrosive coating systems.
As part of an anticorrosive coating system, suitable for maintenance and new construction.
The micaceous iron oxide version improves long-term overcoatability, allowing application at the fabrication shop and subsequent transport to site for final overcoating.
INTERDUR 8840 limited colour range
| Gloss | Matt |
|---|---|
| Volume Solids | 80% |
| Typical thickness | DFT 100–200 µm (4–8 mil) corresponds to WFT 125–250 µm (5–10 mil) |
| Theoretical Spreading Rate | 6.40 m²/L at 125 µm dry film thickness and the stated volume solids; 257 ft²/US gal at 5 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, roller. Drying time; recommended topcoat recoat interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| -5°C (23°F) | 150 min | 48 h | Unlimited¹ | |
| 5°C (41°F) | 90 min | 16 h | Unlimited¹ | |
| 10°C (50°F) | 80 min | 14 h | 13 h | Unlimited¹ |
| 15°C (59°F) | 75 min | 10 h | Unlimited¹ | |
| 25°C (77°F) | 60 min | 5 h | Unlimited¹ | |
¹ See Definitions and Abbreviations from the International Paint Protective Coatings division. When polysiloxane topcoats are used, the maximum recoat interval is reduced. For details, consult International Paint.
If curing at higher temperatures, other curing agents may be used. For details, see the 'Product Characteristics' section.
| Flash point (typical) | Component A 34 °C (93 °F); Component B 31 °C (88 °F); mixed 33 °C (91 °F) |
|---|---|
| Volatile Organic Compounds | 1.72 lb/gal (207 g/L) US EPA Method 24, 92 g/kg, EU Solvent Emissions Directive (Council Directive 2010/75/EU), 159 g/L, Chinese national standard GB 23985. Coating hazard class GB 30981.2-S-Pb≤1000-NC, complying with GB 30981.2-2025. For more details, see 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.
Pre-primed surfaces: Interdur 8840 is suitable for application over recommended anti-corrosive coating surfaces; the primer surface shall be dry and free from all contaminants. Interdur 8840 must be applied within the specified recoat interval (see the relevant product Data Sheet for details).
Damaged areas shall 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 shall be applied before Interdur 8840 is applied.
Before applying Interdur 8840 over substrates pre-primed with zinc-rich primer, ensure the primer surface is clean, dry and free from all contaminants and zinc salts. Before recoating, ensure the zinc-rich primer has fully cured.
| 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) |
|---|
| Pot life | -5°C (23°F) | 5°C (41°F) | 15°C (59°F) | 25°C (77°F) |
| 3 h | 2.5 h | 2 h |
| Suitable for airless spray | Recommended nozzle tip size 0.53–0.63 mm (21–25 thou); total paint pressure at the nozzle not less than 190 kg/cm² (2702 psi) |
|---|---|
| Air Spray | Recommended spray gun: DeVilbiss MBC or JGA-502, air nozzle 704 or 777 |
E
| (with pressure pot) brush | (with pressure pot) suitable | Spray application, typical thickness 75 µm (3.0 mil) |
| Roller application | Suitable | Typical thickness 75 µm (3.0 mils) |
| Thinner | International GTA007 | Normally no thinning is required. |
In extreme cases, consult the local technical representative.
Do not thin beyond the requirements of local environmental regulations.
| Interruption of work | Do not leave paint in hoses, spray guns or spray equipment. Flush all equipment thoroughly with International thinner. |
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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.
Interdur 8840 is mainly used as a high-build barrier coating, providing barrier protection for the coating system. Where appearance is particularly important, overcoating with a durable topcoat from the Interfine or Interthane range is recommended.
Apply by airless spray to achieve the maximum film thickness per coat. Application methods other than airless spray cannot achieve the required film thickness. With air spray, several cross coats are required to achieve the maximum film thickness. At low or high temperatures, special application techniques may be required to achieve the maximum film thickness.
When Interdur 8840 is applied by brush or roller, multiple coats are necessary to achieve the specified total system dry film thickness.
Surface temperature must be maintained at least 3°C (5°F) above the dew point at all times. Ensure adequate ventilation when applying Interdur 8840 in confined spaces. Unacceptably low temperatures and/or high humidity during or immediately after application lead to incomplete curing and surface contamination, which in turn compromises intercoat adhesion.
At curing temperatures above 25 °C (77 °F), another curing agent may be used.
Recommended topcoat overcoating interval
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 25°C (77°F) | 90 min | 6 h | Unlimited * | |
| 40°C (104°F) | 60 min | 2 h | Unlimited * | |
* Refer to "Definitions and Abbreviations" issued by the Protective Coatings division of International Paint. When applying on a specific structure, alternating standard hardener and high-temperature hardener causes significant colour variation, as epoxy resin yellows and fades on exposure to ultraviolet light.
Interdur 8840 is not designed for continuous immersion in water.
The micaceous iron oxide version of this product is often used as a 'transport protection coating' before on-site overcoating. To extend the overcoating interval, do not apply too thickly and avoid over-application; the surface shall be completely clean and free from contamination, as contaminants may lodge in the surface texture due to the rough nature of the micaceous iron oxide pigment.
When Interdur 8840 is applied at temperatures below 15°C (59°F) or at a wet film thickness of 150 µm (6 mil) or less, the addition of approximately 5% International GTA007 Thinner improves film appearance and sprayability and assists in film thickness control.
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.
Interdur 8840 is designed for application on suitably prepared steel.
| Interdur 8801 | Interdur 8807 |
|---|---|
| Interdur 8803 | Interdur 8808 |
| Interdur 8804 | Interdur 8809 |
| Interdur 8805 | Interdur 8810 |
| Interdur 8806 | Suitable topcoats for Interdur 8815 are: Interdur 8860, Interdur 8862, Interdur 8863. For other primers and topcoats, consult International Paint 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 | |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 20 L | 29.3 kg | 9.3 kg |
| Shelf life | 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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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.
