Interline 399 Epoxy Phenolic Resin Coating is an epoxy coating. It is suitable for internal lining of storage vessels, process vessels and piping at temperatures up to 130°C (266°F). A high-performance, highly crosslinked, two-component epoxy phenolic tank lining coating with excellent heat resistance and solvent resistance. 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: dry film thickness 85–125 µm (3.4–5 mil), theoretical spreading rate 6.70 m²/L, number of components: two-component.
Parameter source: AKZONOBEL manufacturer's Technical Data Sheet (TDS) for Interline 399 Epoxy Phenolic Resin Coating; values such as spreading rate are converted according to 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 | 67% |
|---|---|
| Dry Film Thickness | 85–125 µm (3.4–5 mil) |
| Theoretical Spreading Rate | 6.70 m²/L |
| VOC | 2.83 lb/gal (340 g/L) US EPA Method 24 19… |
| Density / Specific Gravity | 1.85 kg/L (15.4 lb/gal) |
| Number of Components | Two-component |
| Thinner | Normally no thinning is required |
| Mixing Ratio | 5.00 parts : 1.00 part (by volume) |
| Colour / Appearance | Limited range, INTERLINE 399 |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A high-performance, highly crosslinked, two-component epoxy phenolic tank lining coating with excellent heat resistance and solvent resistance.
Suitable for internal lining of storage vessels, process vessels and piping at temperatures up to 130°C (266°F).
* Refer to Product Features for details.
| Colour | Limited range, INTERLINE 399 |
|---|---|
| Gloss | N/A |
| Volume Solids | 67% |
| Typical thickness | Dry film thickness 85–125 µm (3.4–5 mil) corresponds to wet film thickness 127–187 µm (5.1–7.5 mil). |
| Theoretical Spreading Rate | At 100 µm dry film thickness and the stated volume solids, 6.70 m²/L; at 4 mil dry film thickness and the stated volume solids, 269 ft²/US gal. |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Airless spray, air spray, roller, brush; drying time and recoat interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 10°C (50°F) | 8 h | 16 h | 36 h | 9 days |
| 15°C (59°F) | 7 h | 12 h | 24 h | 8 days |
| 25°C (77°F) | 5 h | 8 h | 16 h | 7 days |
| 40°C (104°F) | 3 h | 6 h | 16 h | 6 days |
| Flash point (typical) | Component A 26°C (79°F); Component B 48°C (118°F); mixed 24°C (75°F) |
|---|---|
| Product weight | 1.85 kg/L (15.4 lb/gal) |
| Volatile Organic Compounds | 2.83 lb/gal (340 g/L) US EPA Method 24; 199 g/kg EC Solvent Emissions Directive content, Commission Directive 2010/75/EU; 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 detailed information, see the Product Features section. |
All surfaces to be coated must be clean, dry and free of contaminants. Before painting, 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 Cleaning: This product may only be applied to surfaces prepared by abrasive blast cleaning to Sa2½ (ISO 8501-1:2007) or SSPC SP10. A sharp angular surface profile of 50–75 µm (2–3 mil) is recommended.
Interline 399 shall be applied before oxidation of the steel occurs. If oxidation has occurred, the entire oxidized area shall be abrasive blast cleaned again to the standards specified above.
Surface defects exposed by blast cleaning must be ground, filled or treated by a suitable method.
Where local VOC regulations permit, before oxidation occurs, Interline 399 (diluted 10% with GTA220) may be applied as a primer to the surface at a dry film thickness of 40 µm (1.5 mil). Alternatively, dehumidification equipment may be used to maintain the blast standard.
| Mixing | For tank application, Interline 399 shall be applied in accordance with the International Protective Coatings application guide. This product is supplied as a set in two containers. Always mix the entire set in the correct ratio. Once a set has been mixed, it shall 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 | 5.00 parts : 1.00 part (by volume) |
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| Pot life | 10°C (50°F) | 15°C (59°F) | 25°C (77°F) | 40°C (104°F) |
| 5 h | 4 h | 2 h | 1 h |
| 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) | Nozzle | E | |
| Brush | Suitable for small-area touch-up | Typical thickness 50–75 µm (2.0–3.0 mils) | |
| Roller application | Not recommended | ||
| Thinner | International GTA220 | Normally no thinning is required. |
In extreme cases, consult the local technical representative.
Do not thin beyond the requirements of local environmental regulations.
| Cleaner | International GTA853 or International GTA415 |
|---|---|
| Interruption of work | Paint must not be left 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 before resuming application. |
| Cleaning | All equipment should be cleaned immediately after use with International thinner. Flushing spray equipment periodically during the daily work is good working practice. Cleaning frequency depends on the volume sprayed, temperature and time spent, including delays. |
All surplus paint and empty containers must be disposed of in accordance with the appropriate local regulations/laws.
Before use, refer to the detailed Interline 399 application procedure.
Interline 399 is typically specified as a three-coat system with a thickness of 90 µm (3.6 mil) per coat and a total dry film thickness of 270 µm (10.8 mil). The exact specification for total dry film thickness depends on the specific requirements of the end use. For specific recommendations on the application of tank lining materials, consult International Protective Coatings.
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 399 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, the following minimum curing times are recommended to fully develop the chemical resistance of Interline 399.
| Temperature | Curing time |
|---|---|
| 10°C (50°F) | 14 days |
| 15°C (59°F) | 10 days |
| 25°C (77°F) | 7 days |
| 35°C (95°F) | 5 days |
| 40°C (104°F) | The 4-day curing time is 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 and hardened, a suitable non-destructive magnetic thickness gauge shall be used to measure the dry film thickness of the coating system and verify the average total thickness of the applied coating. The coating shall be free from pinholes and other missed areas. The cured film must be free from accumulations, sagging, drips, inclusions and other defects. All defects and imperfections shall be corrected. Repaired areas must be re-inspected and cured as specified before the final lining coat is placed into service. For suitable repair procedures, refer to International Protective Coatings' Interline 399 application procedure.
Interline 399 is suitable for end-use environments involving low-salinity hot water, such as boiler rooms, at temperatures up to 95°C (203°F). For higher-temperature applications, contact an International representative.
This product holds the following specification approval: DEF STAN 80-97, for bulk aviation fuel tank lining.
Spanish Norma INTA 164402-A.
Note: the VOC value given is based on the maximum possible value for the product and 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 399 shall only be recoated with itself and shall never be recoated with other products.
Consult International Protective Coatings to ensure that Interline 399 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 | Located in the following documents provided on the website: • Definitions and Abbreviations • Surface Preparation • Coating Application • Theoretical and Practical Spreading Rate • Interline 399 Application Instructions |
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This product is intended for professional applicators in industrial use only.
All work, including the application and use of this product, must comply with the relevant national standards, laws and regulations on safety, health and environmental protection.
During application and the subsequent drying period, provide adequate ventilation to keep solvent concentrations within safe limits and prevent fire and explosion (for general drying times, see the product data sheet). Forced ventilation is required in confined spaces. During application and drying, personal ventilation and/or respiratory protection (e.g. air-fed hood or suitable filter mask) must also be provided. Take the necessary measures to prevent skin and eye contact with the coating (e.g. protective clothing, gloves, goggles, mask, barrier cream).
Before use, read and follow the Health and Safety section of the Material Safety Data Sheet and the application procedure for the product (for two-component coatings, those of the base and curing agent).
If welding or flame cutting is performed on metal substrate coated with this product, dust and fumes will be released; use suitable personal protective equipment and local exhaust ventilation.
The specific safety measures depend on the application method and working environment. If these warnings or instructions are not fully understood or cannot be strictly observed, do not use the product and consult the International Paint Protective Coatings division.
| Packaging Specifications | Component A | Component B | ||
| Volume | Packaging | Volume | Packaging | |
| 20 L | 16.67 L | 20 L | 3.33 L | 5 L |
| 5 US gal | 4.17 US gal | 5 US gal | 0.83 US gal | 1 US gal |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 20 L | 35.7 kg | 3.96 kg |
| 5 US gal | 71.4 lb | 8 lb |
| 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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All registered trademarks mentioned in this publication are licensed to or owned by AkzoNobel.
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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 in-house article numbers of Interline 399 Epoxy Phenolic 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 |
|---|---|---|
| TLA390 | White | 16.67 L + 3.33 L |
This model has a total of1item 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.
