Interline 925 Solvent-free Epoxy Tank/Compartment Paint is an epoxy paint. Applied to the inner walls of steel storage tanks to provide corrosion protection against attack by various products, including crude oil, white oil and drinking water. A two-component, solvent-free epoxy heavy-duty anti-corrosion tank lining. Coatings with dry film thickness exceeding 500 µm (20 mils) can be inspected with a suitable high-voltage pulse holiday detector, with the voltage set at 100 V per 25 µm dry film thickness (100 V/mil). Parameters on this page: volume solids 100%, dry film thickness 300–600 µm (12–24 mils), theoretical spreading rate 2.50 m²/L.
Data source: AKZONOBEL original Technical Data Sheet (TDS), "Interline 925 Solvent-free Epoxy Tank/Compartment Paint"; 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 | 100% |
|---|---|
| Dry Film Thickness | 300–600 µm (12–24 mils) |
| Theoretical Spreading Rate | 2.50 m²/L |
| VOC | 1.04 lb/gal (125 g/L) US EPA Method 24 23… |
| Density / Specific Gravity | 1.52 kg/L (12.7 lb/gal) |
| Number of Components | Two-component |
| Thinner | Must not be thinned |
| Mixing Ratio | 3 parts : 1 part (by volume) |
| Colour / Appearance | Available in a limited range of colours, INTERLINE 925 |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A two-component, solvent-free epoxy heavy-duty anti-corrosion tank lining.
Applied to the inner walls of steel storage tanks to provide corrosion protection against attack by various products, including crude oil, white oil and drinking water. Suitable for lining of pipelines and fittings. Can be applied on concrete as a lining and secondary containment.
| Colour | Available in a limited range of colours, INTERLINE 925 |
|---|---|
| Gloss | N/A |
| Volume Solids | 100% |
| Typical thickness | Dry film thickness 300–600 µm (12–24 mils), equivalent to wet film thickness 300–600 µm (12–24 mils). Tank bottoms can use a single coat of 400–1000 µm (16–40 mils). |
| Theoretical Spreading Rate | At 400 µm dry film thickness and the stated volume solids, 2.50 m²/L; at 16 mils dry film thickness and the stated volume solids, 100 sq ft/US gal |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Airless spray, roller, brush, drying time, recommended topcoat overcoating interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 10°C (50°F) | 15 h | 36 h | 2 days | |
| 15°C (59°F) | 12 h | 24 h | 2 days | |
| 25°C (77°F) | 8 h | 18 h | 1 day | |
| 40°C (104°F) | 5 h | 7 h | 12 h | |
| Flash point (typical) | Component A >101 °C (214 °F); Component B >101 °C (214 °F); after mixing >101 °C (214 °F) |
|---|---|
| Product weight | 1.52 kg/L (12.7 lb/gal) |
| Volatile Organic Compounds | 1.04 lb/gal (125 g/L) US EPA Method 24 23 g/kg EU Solvent Emissions Directive content (EU Council Directive 2010/75/EU). Coating hazard GB 30981.2-S-Pb≤90-C, complies with GB 30981.2-2025. For more details, see the "Product Characteristics" 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 blasting: the product shall be applied only to surfaces abrasive-blast-cleaned to Sa2½ (ISO 8501-1:2007) or SSPC SP10. A sharp, angular surface profile of 75–100 µm (3–4 mil) is recommended.
Interline 925 must be applied before the steel oxidizes. If oxidation has indeed occurred, the entire oxidized area shall be re-blasted to the standard specified above. Surface defects exposed during blast cleaning shall be ground, filled or treated by a suitable method.
Where permitted by local VOC regulations, Interline 982 may be applied as a primer before oxidation occurs, at a dry film thickness of 15–25 µm (0.6–1.0 mil). Dehumidification may also be used to maintain the blast standard.
Interline 982 keeps the blast standard on tank interiors in a semi-protected environment for up to 28 days. If moisture is present on the surface, oxidation occurs and re-blasting is required.
For concrete surfaces, consult the International Paint Protective Coatings division for professional advice.
| Mixing | For tank application, Interline 925 must be applied following the application guide of International Protective Coatings. The paint is packed in two cans and supplied as one set. Always mix the whole set according to the supplied ratio. Once mixed, a set must be used within the specified pot life. |
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(1) Stir the base (Component A) with a power mixer.
(2) Stir the curing agent (Component B) with a power mixer.
(3) Mix all of the curing agent (Component B) with the base (Component A) and stir thoroughly with a mixer.
| Mixing ratio | 3 parts : 1 part (by volume) |
|---|
| Pot life | 10°C (50°F) | 15°C (59°F) | 25°C (77°F) | 40°C (104°F) |
| 2 h | 90 min | 60 min | 30 min |
| Suitable for airless spray | Recommended nozzle tip size 0.53–0.66 mm (21–26 thou); total paint pressure at the nozzle not less than 211 kg/cm² (3000 psi) |
|---|---|
| Air Spray | Not recommended (with pressure pot) |
| Brush | Applicable — for small-area repair only | Typical thickness 150–200 µm (6.0–8.0 mils) |
| Roller application | Typical thickness 150–200 µm (6.0–8.0 mils) | |
| Thinner | N/A | Must not be thinned |
| Cleaner | Use a cleaning solvent that complies with local regulations. Consult the local representative for specific recommendations. |
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| 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, consult the detailed Interline 925 application procedure.
The exact total dry film thickness and number of coats of the coating system depend on the service requirements. Refer to International Paint's specific recommendations for tank lining application.
Apply by airless spray only. Other methods such as brush or roller may require more than one coat and are recommended only for small areas or initial stripe coating.
Heavily pitted areas should be pre-coated by brush to ensure good surface wetting.
When the paint temperature is maintained above 30 °C (86 °F), Interline 925 can be applied with conventional airless spray equipment. At lower temperatures, a pipeline heater of suitable pressure rating can be used to assist the pick-up and atomization of the product.
The surface temperature must always be maintained at least 3 °C (5 °F) above the dew point.
Do not apply when the steel temperature is below 10 °C (50 °F).
The climatic conditions inside the tank must be controlled, keeping the maximum relative humidity at 50% at 10–15 °C (50–59 °F) and 60% at 16 °C (61 °F).
The relative humidity in closed tanks shall be controlled with dehumidification equipment. If no dehumidification equipment is available, single-coat application should be used to avoid intercoat adhesion problems.
With multi-coat systems, keep the recoat interval as short as possible to achieve ideal intercoat adhesion.
Unacceptably low temperature and/or high humidity during or immediately after application leads to incomplete curing and surface contamination, compromising intercoat adhesion.
After the final coat has cured and hardened, 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 of any pinholes or other holidays. Coatings with dry film thickness exceeding 500 µm (20 mils) can be inspected with a suitable high-voltage pulse holiday detector, with the voltage set at 100 V per 25 µm dry film thickness (100 V/mil). Excessive voltage will create holidays in the film. The cured film must be free of sags, runs, drips, inclusions or other defects. All defects shall be corrected. Repaired areas must be re-inspected and cured as specified before the final lining is put into service. For detailed repair procedures, consult the International Protective Coatings application procedures.
The film must be fully cured to achieve ideal chemical resistance. The degree of cure depends on temperature, humidity and film thickness. Typically, at a dry film thickness of 400 µm (16 mils), full cure and ideal chemical resistance are achieved after 7–10 days at 25 °C (77 °F). As temperature rises, curing time shortens proportionally; as temperature falls, curing time lengthens.
Interline 925 is not suitable for aqueous media with storage temperatures above 60 °C (140 °F).
Because of the presence of low-molecular-weight chemicals in the formulation, when this product is tested according to UK PG6/23(92) Appendix 3 and US EPA Method 24, some VOC is measured because high temperatures are used in the test process.
Like all epoxy resin paints, Interline 925 will chalk and fade when exposed to the exterior. However, these phenomena do not impair its chemical anti-corrosion performance.
This product holds the following specification approval: BS 6920:1988, for contact with drinking water.
Norwegian National Institute of Public Health certificate, for drinking water tanks on offshore installations.
Complies with CFR21-175.300 (trace material report) for the permissible content of extractable coating.
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.
Interline 925 can be applied directly on properly prepared bare steel surfaces. However, when the end application is not a drinking water tank, the following primers apply: Interline 982, Ceilcote 680M (sealer for concrete application). Interline 925 shall only be self-recoated and shall never be overcoated with other products.
Consult International Protective Coatings to ensure that Interline 925 is suitable for contact with the products to be stored.
| For further information on the industry standards, terms and abbreviations used in this datasheet, see www.international-pc.com | Available in the following documents on the website: • Definitions and Abbreviations • Surface Preparation • Paint Application • Theoretical and Practical Spreading Rate • Interline 925 Application Guide |
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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 (for common drying times, see the product data sheet), provide adequate ventilation to keep solvent concentrations within safe limits and prevent fire and explosion. Forced ventilation is required in confined spaces. During application and drying, personal ventilation and 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 Material Safety Data Sheet and the Health and Safety section of the application procedure for this product (for two-component coatings, those of the base and curing agent).
If welding or cutting is performed on metal substrate previously 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 International Paint.
Warning: this product contains liquid epoxy and modified polyamines and may cause skin sensitisation if handled improperly.
| Packaging Specifications | Component A | Component B | ||
| Volume | Packaging | Volume | Packaging | |
| 20 L | 15 L | 20 L | 5 L | |
| 4 US gal | 3 US gal | 5 US gal | 1 US gal | |
| Shipping weight | Packaging Specifications | Component A | Component B | |
| 20 L | 24.3 kg | 8.7 kg | ||
| 4 US gal | 40.8 lb | 14.3 lb | ||
U.N. shipping number non-hazardous (base): 1760 (hardener)
| Shelf life | Minimum 18 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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Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
The factory product codes of Interline 925 Solvent-free Epoxy Tank/Compartment Paint 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 |
|---|---|---|
| THA125 | 127 | 20 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.
