Interdur 8843SG is a polyurethane coating used as a primer. Suitable for moderate corrosive environments, e.g. category C3 as defined in ISO 12944-2:1998. A two-component, high-build acrylic polyurethane primer/topcoat containing zinc phosphate anti-corrosive pigment, providing excellent durability and long-term recoatability. Although low molecular weight reactive additives become part of the film when cured under normal ambient conditions, analysis by EPA Method 24 shows that they also affect the VOC value. Parameters on this page: volume solids 56% ± 2%, dry film thickness 150–200 µm (6–8 mil), theoretical spreading rate 2.80 m²/L.
Parameter source: AKZONOBEL manufacturer's Technical Data Sheet (TDS) "Interdur 8843SG"; 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 | 56% ± 2% |
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| Dry Film Thickness | 150–200 µm (6–8 mils) |
| Theoretical Spreading Rate | 2.80 m²/L |
| VOC | 3.14 lb/gal (377 g/L) US EPA Method 24, 27… |
| Density / Specific Gravity | 1.41 kg/L (11.8 lb/gal) |
| Number of Components | Two-component |
| Thinner | Thinning generally not required. In extreme cases, consult the local technical representative. Thin |
| Mixing Ratio | 7 parts : 1 part (by volume) |
| Gloss | Semi-gloss |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A two-component, high-build acrylic polyurethane primer/topcoat containing zinc phosphate anticorrosive pigment, providing excellent durability and long-term overcoatability.
Suitable as a single primer/topcoat applied directly to metal.
Interdur 8843SG provides corrosion protection, durability and appearance enhancement.
Suitable for medium corrosion environments, for example category C3 as defined by ISO 12944-2:1998.
INTERDUR 8843SG is available in white and a limited range of other colours.
| Gloss | Semi-gloss |
|---|---|
| Volume Solids | 56% ± 2% |
| Typical thickness | DFT 150–200 µm (6–8 mil) corresponds to WFT 268–357 µm (10.7–14.3 mil) |
| Theoretical Spreading Rate | 2.80 m²/L at 200 µm dry film thickness and the stated volume solids; 112 ft²/US gal at 8 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 (41°F) | 90 min | 30 h | Unlimited¹ | |
| 15°C (59°F) | 75 min | 16 h | Unlimited¹ | |
| 25°C (77°F) | 60 min | 5 h | Unlimited¹ | |
| 40°C (104°F) | 45 min | 2.5 h | Unlimited¹ | |
¹ See Definitions and Abbreviations from the International Paint Protective Coatings division.
| Flash point (typical) | Component A 35 °C (95 °F); Component B 50 °C (122 °F); mixed 35 °C (95 °F) |
|---|---|
| Product weight | 1.41 kg/L (11.8 lb/gal) |
| Volatile Organic Compounds | 3.14 lb/gal (377 g/L) US Environmental Protection Agency Method 24 275 g/kg EU Solvent Emissions Directive content Council Directive 1999/13/EC 367 g/L China National Standard GB 23985. For more detailed information, 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.
Abrasive blast cleaning to Sa2.5 (GB8923-1:1998). If oxidation occurs on the steel surface after abrasive blast cleaning and before recoating with Interdur 8843SG, the surface shall be re-blasted to achieve the specified visual surface. Surface defects exposed during abrasive blast cleaning shall be ground, filled or treated in an appropriate manner. Recommended surface roughness: 50 µm.
| 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 | 7 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) |
| 7 h | 3.5 h | 2 h | 45 min |
| Suitable for airless spray | Recommended nozzle tip size 0.43–0.58 mm (17–23 thou); 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) | Applicable | Use suitable dedicated equipment. | |
| Brush | Applicable | Typical thickness 50–75 µm (2.0–3.0 mils) | |
| Roller application | Applicable | Typical thickness 50–75 µm (2.0–3.0 mils) | |
| Thinner | International GTA713 (or | Thinning generally not required. In extreme cases, consult the local technical representative. Thin |
International GTA056) Thinning: do not exceed local environmental regulation requirements.
| Cleaner | International GTA713 (or International GTA056) |
|---|---|
| Interruption of work | Do not leave paint in hoses, spray guns or spray equipment. Flush all equipment thoroughly with International GTA713. |
Once mixed, paint should not be resealed. If work is interrupted for too long, mix a fresh batch for application.
| Cleaning | All equipment shall be cleaned with International GTA 713 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. |
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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.
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 8843SG is applied by brush or roller, multiple coats are necessary to achieve the specified total dry film thickness of the system.
Application personnel should be aware that the coat thickness achieved with a single application of Interdur 8843SG is affected by substrate temperature. At higher steel temperatures, the film build is lower and the resulting coating is thinner.
This product must be thinned only with the recommended International thinner. Other thinners, especially alcohol-containing thinners, severely inhibit the curing process.
Do not apply when the steel temperature is below 5°C (41°F). Ensure adequate ventilation when applying Interdur 8843SG in confined spaces.
Condensation on the surface during or after application will cause loss of gloss and a poor-quality film.
Premature exposure to standing water may cause colour change, especially for dark colours and at low temperatures.
Intercoat adhesion of coatings applied over aged Interdur 8843SG is lower than that over a new coating, but still meets the requirements of the specified use.
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.
Interdur 8843SG is designed as a coating for direct contact with metal.
Suitable topcoats: Interdur 8843SG, Interdur 8860. For further coating system compatibility recommendations, contact the International Protective Coatings department.
| 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, consult International Paint.
Warning: contains isocyanates. Wear an air-fed helmet when spraying.
| Packaging Specifications | Component A | Component B | ||
| Volume | Packaging | Volume | Packaging | |
| 20 L | 17.5 L | 20 L | 2.5 L | 5 L |
For other available packaging sizes, contact International Paint.
| Packaging Specifications | Component A | Component B |
| 20 L | 27 kg | 3.1 kg |
| Shelf life | Minimum 24 months at 25 °C (77 °F) (Component A) & 12 months (Component B). After this period, inspect before use. Store in a dry, cool environment, away from heat 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.
