Interfine 3399 Fluorocarbon Topcoat is a fluorocarbon coating used as a topcoat. These markets include bridges, stadiums, offshore platforms, oil depots, chemical and petrochemical plants, pulp and paper, power industry, and common industrial and commercial steel structures where aesthetics are important. Compared with conventional catalyzed acrylic and polyurethane topcoats, Interfine 3399 has excellent gloss and colour retention and significantly improved resistance to yellowing and chalking. After mixing, an induction time of 15 to 30 minutes is recommended for Interfine 3399 before application. Parameters on this page: volume solids 48% ± 3%, dry film thickness 40–60 µm (1.6–2.4 mils), theoretical spreading rate 9.60 m²/L.
Parameter source: AKZONOBEL original technical data sheet (TDS) "Interfine 3399 Fluorocarbon Topcoat"; values such as spreading rate are converted from TDS parameters and are 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 | 48% ± 3% |
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| Dry Film Thickness | 40–60 µm (1.6–2.4 mil) |
| Theoretical Spreading Rate | 9.60 m²/L |
| VOC | 3.98 lb/gal (477 g/L) US EPA Method 24 44… |
| Density / Specific Gravity | 1.25 kg/L (10.4 lb/gal) |
| Number of Components | Two-component |
| Thinner | Normally no thinning is required |
| Mixing Ratio | 5.5 parts : 1 part (by volume) |
| Colour / Appearance | Clear, metallic and a range of other colours, INTERFINE 3399 |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A high-performance, two-component fluorocarbon topcoat, as part of a high-performance anti-corrosion system, extends the service life of the coating before the first major overhaul. Compared with conventional catalyzed acrylic and polyurethane topcoats, Interfine 3399 has excellent gloss and colour retention and significantly improved resistance to yellowing and chalking.
For market sectors with high visual and aesthetic requirements. These include bridges, stadiums, offshore platforms, oil depots, chemical and petrochemical plants, pulp and paper, the power industry, and general industrial and commercial steelwork where appearance is important.
| Colour | Clear, metallic and a range of other colours, INTERFINE 3399 |
|---|---|
| Gloss | |
| Volume Solids | 48% ± 3% |
| Typical thickness | Dry film thickness 40–60 µm (1.6–2.4 mils) corresponds to wet film thickness 83–125 µm (3.3–5 mils) |
| Theoretical Spreading Rate | At 50 µm dry film thickness and the stated volume solids, 9.60 m²/L; at 2 mils dry film thickness and the stated volume solids, 385 ft²/US gal |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Airless spray, air spray, brush. Drying time to overcoating interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 5°C (41°F) | 1 h | 45 h | 2 weeks | |
| 15°C (59°F) | 30 min | 20 h | 2 weeks | |
| 25°C (77°F) | 30 min | 11 h | 2 weeks | |
| 40°C (104°F) | 30 min | 4 h | 2 weeks | |
| Flash point (typical) | Component A 27 °C (81 °F); Component B 29 °C (84 °F); mixed 27 °C (81 °F) |
|---|---|
| Product weight | 1.25 kg/L (10.4 lb/gal) |
| Volatile Organic Compounds | 3.98 lb/gal (477 g/L) US EPA Method 24 446 g/L Chinese National Standard GB 23985 Coating hazard GB 30981.2-S-Pb≤90-C complies with GB 30981.2-2025. For more detailed information, please refer to the "Product Characteristics" section. |
All surfaces to be coated shall be clean, dry, free from oil, dust and other contaminants. To achieve better performance, all surface defects of the primer or base coat, such as sagging, dry spray or orange peel, shall be removed. Prior to painting, all surfaces shall be assessed and prepared in accordance with ISO 8504:2000.
Pre-primed surfaces: Interfine 3399 shall always be applied over the recommended anti-corrosive primer. The primer surface shall be dry and free from any contaminants. Interfine 3399 must be applied within the specified overcoating interval (refer to the relevant product data sheet).
Areas with cracks, damage, etc. shall be prepared to the grade specified in the standard (e.g. Sa2½ (ISO 8501-1:2007), SSPC SP6, or SSPC SP11) and the primer shall be repaired before applying Interfine 3399.
| 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.
After mixing, an induction time of 15 minutes is recommended for Interfine 3399 before application.
| Mixing ratio | 5.5 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) |
| 6.5 h | 4 h | 3 h | 1.5 h |
| Suitable for airless spray | Recommended nozzle tip size 0.43–0.48 mm (17–19 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) | Recommended | Use suitable dedicated equipment. | |
| Brush | For small-area repair only | Typical thickness 25–50 µm (1.0–2.0 mils) | |
| Roller application | Not recommended | ||
| Thinner | International GTA263 | Normally no thinning is required. |
In extreme cases, consult the local technical representative.
Do not thin beyond the requirements of local environmental regulations.
| Cleaner | Use a cleaning solvent that complies with local regulations. Consult the local representative for specific recommendations. |
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| 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 delays, and other factors. |
All surplus paint and empty containers must be disposed of in accordance with the relevant local laws/regulations.
After mixing, an induction time of 15 to 30 minutes is recommended for Interfine 3399 before application.
When using metallic topcoats, a single application method should be used where possible, because different methods produce different aesthetic effects.
When overcoating after weathering or ageing, ensure the coating is thoroughly cleaned to remove all surface contaminants, such as oil, grease, crystalline salts and road dirt, before applying subsequent Interfine 3399 coats.
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 Interfine 3399 in confined spaces.
Condensation during or immediately after application will result in a poor film.
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.
Interfine 3399 may be applied directly over the following approved products:
| Interfine 878 | Interfine 979 |
|---|---|
| Intergard 251 | Intergard 269 |
| Intergard 475HS | Interseal 670HS |
| Interthane 870 | Interthane 990Interzone 954For other suitable primers, consult International. |
| 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 | 16.92 L | 20 L | 3.08 L | 5 L |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 20 L | 22.8 kg | 3.71 kg |
| Shelf life | At least 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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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.
The factory product codes for Interfine 3399 Fluorocarbon Topcoat are as follows.Item No.is the most accurate form when ordering;Colour/colour codecorresponds to the actual colour (RAL, GSB are colour chart codes);Packaging SpecificationsFactory complete-set specification format. Colors not listed may be ordered against the colour card.
| Item No. | Colour / colour code | Packaging Specifications |
|---|---|---|
| SFZ016 | RAL9016 | 20 L |
| SFY899 | RAL7021 | 20 L |
This model has a total of2item numbers, all listed on this page; colours outside the table (including special colours and bulk packaging) can be confirmed by phone, delivery dates are advised according to the factory's current production schedule and stock. In the packaging specification, the "+" indicates the complete-set notation for two-component products (base + curing agent), subject to the factory specification; a "—" in the colour column denotes an auxiliary product, or that the item has no colour code in the factory system.
