Interline 399C Epoxy Phenolic Resin Coating belongs to Epoxy. It provides excellent resistance to a wide range of chemicals at temperatures up to 90 °C (194 °F). A high-crosslink-density, two-component, high-build phenolic epoxy resin lining coating with outstanding chemical and heat resistance, as well as static dissipation properties. Although low-molecular-weight reactive additives become part of the film under normal ambient curing conditions, analysis by EPA Method 24 shows that they also affect the VOC value. Parameters on this page: volume solids 70% ± 2%, dry film thickness 90–150 µm (3.6–6 mils), theoretical spreading rate 5.60 m²/L.
Parameter source: AKZONOBEL original Technical Data Sheet (TDS) 'Interline 399C Epoxy Phenolic Resin Coating'; 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 | 70% ± 2% |
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| Dry Film Thickness | 90–150 µm (3.6–6 mils) |
| Theoretical Spreading Rate | 5.60 m²/L |
| VOC | 2.47 lb/gal (297 g/L) US EPA Method 24 coating… |
| Density / Specific Gravity | 1.78 kg/L (14.9 lb/gal) |
| Number of Components | Two-component |
| Mixing Ratio | 6 parts : 1 part by volume |
| Colour / Appearance | Grey, INTERLINE 399C |
| Gloss | N/A |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A high-crosslink-density, two-component, high-build phenolic epoxy resin lining coating with outstanding chemical and heat resistance, as well as static dissipation properties
Interline 399C provides protection for chemical storage tanks where static accumulation may occur. It provides excellent resistance to a wide range of chemicals at temperatures up to 90 °C (194 °F).
Interline 399C is suitable for crude oil immersion service, with a maximum resistance temperature of 90 °C (194 °F)
| Colour | Grey, INTERLINE 399C |
|---|---|
| Gloss | N/A |
| Volume Solids | 70% ± 2% |
| Typical thickness | Dry film thickness 90–150 µm (3.6–6 mils) corresponds to wet film thickness 129–214 µm (5.2–8.6 mils) |
| Theoretical Spreading Rate | At 125 µm dry film thickness and the stated volume solids: 5.60 m²/L; at 5 mils dry film thickness and the stated volume solids: 225 ft²/US gal |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray, air spray, brush; drying time to overcoating interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 10°C (50°F) | 9 h | 18 h | 36 h | 15 days |
| 25°C (77°F) | 3 h | 5 h | 16 h | 15 days |
| 40°C (104°F) | 1 h | 4 h | 16 h | 15 days |
| Flash point (typical) | Component A 27 °C (81 °F); Component B 55 °C (131 °F); Mixed 28 °C (82 °F) |
|---|---|
| Product weight | 1.78 kg/L (14.9 lb/gal) |
| Volatile Organic Compounds | 2.47 lb/gal (297 g/L) US EPA Method 24 Coating Hazardous GB 30981.2-S-Pb≤1000-NC Complies with GB 30981.2-2025. For more detailed information, please see the section on "Product Characteristics". |
All surfaces to be coated must be clean and free of contamination. Before application, all surfaces must be assessed and prepared in accordance with ISO 8504:2000.
Where required, remove weld spatter and grind welds and sharp edges smooth.
Oil and grease must be removed in accordance with the SSPC-SP1 solvent cleaning standard.
Abrasive blast clean to at least Sa 2.5 (ISO 8501-1:2007) or SSPC-SP10.
Recommended surface roughness 50–75 µm (2–3 mils).
Interline 399C must be applied before oxidation of the steel occurs. If oxidation has occurred, the oxidized areas must be re-blast cleaned to meet the above standards.
Surface defects exposed by blast cleaning must be ground, filled or treated by another suitable method.
| Mixing | For tank application, Interline 399C must be applied in accordance with the International Protective Coatings application guide. This product is supplied in two containers as a unit. Mix the entire contents of the two containers together at the specified ratio. Once mixed, the product must be used 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 |
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| Pot life | 10°C (50°F) | 25°C (77°F) | 40°C (104°F) |
| 5 h | 90 min | 45 min |
| Suitable for airless spray | Recommended: nozzle diameter 0.43–0.53 mm (17–21 thousandths of an inch); total paint pressure at the nozzle not less than 176 kg/cm² (2503 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 | |
| Brush | Suitable for small-area touch-up | Typical thickness 50 µm (2.0 mil) |
| 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. |
Mixed paint should not be resealed. If work is interrupted for too long, mix a fresh batch of paint for application.
| Cleaning | Clean all equipment immediately after use with International thinner. Flushing spray equipment periodically during application is recommended. Cleaning frequency depends on the volume sprayed, temperature and time, including all interruptions. |
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Surplus paint and empty containers must be disposed of in accordance with the relevant local regulations.
Before use, consult the detailed application procedure. Interline 399C must not be applied over unapproved primers or old coatings, as this may interfere with static dissipation properties.
Interline 399C is generally specified as a 2-coat system with a film thickness of 125 µm (5 mils) per coat, giving a total dry film thickness of 250 µm (10 mils). The exact system for this total dry film thickness depends on the requirements of the final use. Consult International Paint Industrial Coatings for specific recommendations on tank lining application.
To achieve the maximum film thickness in one coat, airless spray is the ideal method. Application methods other than airless spray cannot achieve the required film thickness. With conventional air spray, several cross coats are required to achieve the maximum film thickness. Brush and roller are recommended for small areas only.
The temperature of the surface to be coated must be at least 3 °C (5 °F) above the dew point.
Do not apply when the steel temperature is below 10 °C (50 °F). The relative humidity during application and curing shall not exceed 80%.
Ensure adequate ventilation when applying Interline 399C in confined spaces.
Good ventilation and strict control of the film thickness throughout application and curing are essential to ensure complete removal of retained solvent and optimum performance of the cured film. The film thickness of the whole coating system shall not exceed 350 µm (14 mil).
Curing time varies with the dry film thickness and the conditions during application and throughout curing.
For commissioning, to fully achieve the chemical resistance of Interline 399C, it is recommended to follow the minimum curing times below.
| Temperature | Curing time |
|---|---|
| 10°C (50°F) | 14 days |
| 25°C (77°F) | 7 days |
| 40°C (104°F) | The 4-day curing time refers to the minimum curing time required at the above substrate temperatures before the coating is immersed in the chemicals listed in the chemical resistance list. |
After the final coat has cured hard, measure the dry film thickness of the coating system with a suitable non-destructive magnetic thickness gauge to verify the average total thickness of the applied coating. The coating shall be free from any pinholes or other misses. The cured film must be free from pooling, sagging, drips, inclusions or other defects. All defects and faults shall be corrected. Repaired areas must be re-inspected and cured as specified before the final lining coat is put into service. For suitable repair procedures, refer to the International Paint Industrial Coatings Interline 399C application procedure.
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.
This is a self-recoating coating, not suitable for application over other primers.
Interline 399C should only be recoated with itself; never recoat with other products.
Please confirm with International Paint whether Interline 399C is suitable for contact with the product to be stored.
| 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 | 17.14 L | 20 L | 2.86 L | 5 L |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 20 L | 34.26 kg | 3.18 kg |
| Shelf life | At 25 °C (77 °F), at least 6 months, 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.
