Interdur 8803 is a zinc-rich primer. Suitable for cathodic protection of steel structures, tanks, equipment, pipelines and other steel surfaces exposed to medium to severe industrial environments. A high-performance, two-component reinforced zinc-rich primer. However, in some extreme environments, a small amount (10% by volume or less) of International GTA110 thinner may be added according to local VOC and air quality regulations. Parameters on this page: volume solids 70% ± 2%, theoretical spreading rate 8.75 m²/L, components two-component.
Data source: AKZONOBEL original Technical Data Sheet (TDS), "Interdur 8803 Reinforced Zinc-rich 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 | 70% ± 2% |
|---|---|
| Dry Film Thickness | — |
| Theoretical Spreading Rate | 8.75 m²/L |
| VOC | 2.57 lb/gal (309 g/L) US EPA Method 24 31… |
| Density / Specific Gravity | 1.83 kg/L (15.3 lb/gal) |
| Number of Components | Two-component |
| Thinner | International GTA110 |
| Mixing Ratio | 9 parts : 1 part (by volume) |
| Gloss | Matt |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A high-performance, two-component reinforced zinc-rich primer
Suitable for cathodic protection of steel structures, tanks, equipment, pipelines and other steel surfaces exposed to medium to severe industrial environments. Because of simple application, wide compatibility and fast drying/recoating, it is also very suitable for maintenance and repair projects.
INTERDUR colour green 8803
| Gloss | Matt |
|---|---|
| Volume Solids | 70% ± 2% |
| Typical thickness | 60 µm (2.4 mils) dry film, equivalent to 86 µm (3.4 mils) wet film |
| Theoretical Spreading Rate | At 80 µm dry film thickness and the stated volume solids, 8.75 m²/L; at 3.2 mils dry film thickness and the stated volume solids, 351 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) | *¹ | 23 h | 5.5 h | 90 days² |
| 15°C (59°F) | *¹ | 9 h | 2 h | 90 days² |
| 25°C (77°F) | *¹ | 5 h | 1 h | 90 days² |
¹ Not applicable. ² When overcoating or self-overcoating with an epoxy intermediate coat/topcoat, the overcoating interval of Interdur 8803 is shortened by the recommended topcoat; for further details, refer to "Product Characteristics".
| Flash point (typical) | Component A 27 °C (81 °F); Component B 27 °C (81 °F); mixed 27 °C (81 °F) |
|---|---|
| Product weight | 1.83 kg/L (15.3 lb/gal) |
| Volatile Organic Compounds | 2.57 lb/gal (309 g/L) US EPA Method 24 312 g/L China National Standard GB 23985. Coating hazard GB 30981.2-S-Pb≤1000-NC, complies with GB 30981.2-2025. For more details, see the "Product Characteristics" section |
All surfaces of the steel substrate 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.
Where required, remove weld spatter and grind welds and sharp edges smooth.
Blast clean to at least Sa 2 (GB 8923-1:1998); cleaner surfaces, such as Sa 2.5 (GB 8923-1:1998), can increase the performance of the primer and coating system. The blast-cleaned surface should be jagged sharp peaks rather than "flat peaks", with a surface roughness of 38–62 µm. Vacuum or blow off all dust to ensure the surface is still clean before painting.
Previously painted surfaces: Interdur 8803 must not be overcoated directly on existing coating surfaces. All coatings must be removed by blasting to at least Sa 2 (GB 8923-1:1998).
| Mixing | The material is supplied in two containers. Always mix the whole container as a unit. The zinc metal is pre-mixed and stored in Part A. Slowly add Part B while mixing slowly until completely uniform. At 60 °F (16 °C), allow to stand for 15 minutes before use; for every 10 °F (6 °C) drop in temperature, increase the standing time by 10 minutes. |
|---|---|
| Mixing ratio | 9 parts : 1 part (by volume) |
| Pot life | 5°C (41°F) | 15°C (59°F) | 25°C (77°F) |
| 10 h | 9 h | 8 h |
| Suitable for airless spray | Recommended nozzle size 0.63 mm (25 mils); paint pressure at the nozzle not less than 211 kg/cm² (3000 lb/in²). For more details, see the "Product Characteristics" section |
|---|---|
| Air spray (conventional) | Suitable. For more details, see the "Product Characteristics" section |
| Brush | Suitable |
| Roller application | Suitable |
| Thinner | International GTA110 |
| Interruption of work | Do not let paint remain in the hose, spray gun or spray equipment. Flush all equipment thoroughly with International cleaning agent. Mixed paint should not be resealed. If the interruption is long, it is recommended to use freshly mixed paint when resuming work. |
| Cleaning | All equipment shall be cleaned with International thinner immediately after use. Periodically flushing spray equipment during the daily work is good practice. The frequency of cleaning depends on the quantity sprayed, temperature, spraying time and interruptions. All remaining paint and empty containers shall be disposed of in accordance with local laws and regulations. |
Advantages: - Excellent anti-corrosion performance - Provides cathodic protection - Simple mixing - Pre-mixed zinc powder formulation - Short drying time, short overcoating interval - Effectively reduces topcoat blistering - Excellent crack resistance - Suitable for various simple application methods (such as brush, roller or spray) - Compatible with most high-performance topcoats - Curing conditions unaffected by humidity. Interdur 8803 is not suitable for solvent or chemical immersion environments.
When overcoating Interdur 8803 with the recommended topcoat, the following overcoating intervals shall be observed;
Minimum; maximum
| 5°C (41°F) | 5.5 hours 5 days |
|---|---|
| 15°C (59°F) | 2 h; 5 days |
| 25°C (77°F) | 1 hour. 5 days. Do not use alkyd or alkyd polyurethane topcoats. For airless spray, use a fluid hose with an I.D. of 3/8'' and a maximum length of 50 ft. The pressure or pump should be kept at the same level as or above the spray gun, so that the fluid delivery pressure is minimised. |
Air spray application: use a professional-grade conventional spray gun with a nozzle of 1.78 mm (0.070 '') or larger to form the spray. Use a hose with an internal diameter of 1/2 inch and a length not exceeding 50 ft, with the fluid pressure maintained at 15 psi (pounds per square inch).
Thinning is usually not required; however, in some extreme environments, a small amount (10% by volume or less) of International GTA110 thinner may be added according to local VOC and air quality regulations. Any solvent addition must be made after the two components are thoroughly mixed.
Note: VOC values are typical and for guidance only. They may vary with colour and general production tolerances.
The following topcoats are approved for use with Interdur 8803: Interdur 8814, Interdur 8840, Interdur 8860
| 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 | ||
| 10 L | 9 L | 12 L | 1 L | 5 L | |
| Shipping weight | Packaging Specifications | Component A | Component B | ||
| 10 L | 18.3 kg | 1.4 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.
