Interfine 878 Acrylic Polysiloxane Topcoat belongs to acrylic paints and is used as a topcoat. Suitable for spray and roller application in new-build factory facilities and on-site maintenance environments; suitable for use where regulations prohibit isocyanates and restrict solvent emissions. Interfine 878 provides strong gloss retention and colour retention; compared with conventional topcoats including acrylic catalysed topcoats and polyurethane topcoats, yellowing resistance and chalking resistance are significantly improved. Ensure adequate ventilation when applying Interfine 878 in confined spaces. Parameters on this page: dry film thickness 50–75 µm (2–3 mil), theoretical spreading rate 12 m²/L, number of components two-component.
Parameter source: AKZONOBEL original Technical Data Sheet (TDS) - Interfine 878 Acrylic Polysiloxane 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 | 72% |
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| Dry Film Thickness | 50–75 µm (2–3 mils) |
| Theoretical Spreading Rate | 12 m²/L |
| VOC | 2.05 lb/gal (246 g/L) US EPA Method 24 194… |
| Density / Specific Gravity | 1.34 kg/L (11.2 lb/gal) |
| Number of Components | Two-component |
| Thinner | Do not thin beyond the limits of local regulations |
| Mixing Ratio | 5 parts : 1 part (by volume) |
| Colour / Appearance | A wide range of colours can be produced through the Chromascan tinting system |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A high-performance, two-component, high-solids topcoat free of free isocyanate, with VOC content compliant with current environmental regulations. When used as the topcoat of a high-performance anti-corrosive system, it can extend the service life of the coating system before the first major overhaul.
Interfine 878 provides strong gloss retention and colour retention; compared with conventional topcoats including acrylic catalysed topcoats and polyurethane topcoats, yellowing resistance and chalking resistance are significantly improved.
Interfine 878 is a hard, wear-resistant topcoat for application over suitably primed surfaces; it has good flexibility and wear resistance and provides protection against spills and splashes of various chemicals such as acids, alkalis, solvents and salt solutions. Suitable for spray and roller application in new-build factory facilities and on-site maintenance environments; suitable for use where regulations prohibit isocyanates and restrict solvent emissions.
For market segments where high-standard decorative appearance and aesthetic effect are the main requirements. These markets include high-performance steel structure buildings, such as sports venues, bridges, offshore platforms, FPSO vessels, tank farms, chemical plants and petrochemical plants, paper mills and the power industry, as well as general industrial and commercial steel structures where appearance is critical.
| Colour | A wide range of colours can be produced through the Chromascan tinting system. |
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INTERFINE 878
| Gloss | High gloss |
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| Volume Solids | 72% |
| Typical thickness | DFT 50–75 µm (2–3 mil) corresponds to WFT 69–104 µm (2.8–4.2 mil) |
| Theoretical Spreading Rate | At 60 µm dry film thickness and the stated volume solids, 12 m²/L. At 2.4 mil dry film thickness and the stated volume solids, 481 ft²/US gal. |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Airless spray, conventional spray, roller; drying time; recommended topcoat recoat interval. |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 5°C (41°F) | 6 h | 8 h | Unlimited¹ | |
| 15°C (59°F) | 4.5 h | 6 h | Unlimited¹ | |
| 25°C (77°F) | 3 h | 4 h | Unlimited¹ | |
| 40°C (104°F) | 1.5 h | 2.5 h | Unlimited¹ | |
¹ See the Definitions and Abbreviations of the International Paint Protective Coatings Division. The quoted drying times are measured at the stated temperature and 50% relative humidity.
The recommended recoat interval for primer and intermediate coat depends on the primer/intermediate coat actually used. Refer to the
| Flash point (typical) | Component A 34°C (93°F); Component B 55°C (131°F); after mixing 35°C (95°F) |
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| Product weight | 1.34 kg/L (11.2 lb/gal) |
| Volatile Organic Compounds | 2.05 lb/gal (246 g/L) US EPA Method 24 194 g/kg EC 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 detailed information, refer to the Product Characteristics section. |
All surfaces to be coated must be clean, dry and free of contaminants. Before application, all surfaces must be assessed and prepared in accordance with ISO 8504:2019.
Pre-primed surfaces: Interfine 878 shall always be applied over the recommended anti-corrosive primer. The primer surface shall be dry and free from any contaminants. Interfine 878 shall be applied within the specified recoat interval (refer to the relevant product data sheet).
Areas with cracks or damage 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 application of Interfine 878.
| Mixing | This product is supplied in two containers forming one unit. Mix the two components in the specified ratio in one operation. 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 | 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) |
| 3.5 h | 2.5 h | 2 h | 1.5 h |
| Suitable for airless spray | Recommended nozzle diameter 0.28–0.43 mm (11–17 mil); 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) | Nozzle | E | |
| Brush | Applicable — for small-area repair only | Typical thickness 25–50 µm (1.0–2.0 mils) | |
| Roller application | Suitable | Typical thickness 50–75 µm (2.0–3.0 mils) | |
| Thinner | International GTA007 | Do not thin beyond the limits of local 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. |
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All surplus paint and empty containers must be disposed of in accordance with the relevant local laws/regulations.
The technology used in Interfine 878 is covered by patents (US 6,281,321 and EP 0 941290).
Gloss and surface evenness depend on the application method. Avoid mixing different application methods as far as possible.
Conventional air spray generally gives ideal gloss and appearance.
For brush and roller application, two coats of Interfine 878 may be required for certain colours to achieve uniform coverage, particularly over dark primers or when using certain lead-free bright colours such as yellow and orange. A colour-matched intermediate coat or anti-corrosive coat beneath Interfine 878 is recommended.
This product shall be thinned only with the recommended International brand thinner. Other thinners, particularly those containing alcohols and ketones, will severely inhibit the curing process of the coating.
Do not exceed the pot life; even if the paint remains liquid, further use is not recommended. A good working practice is to start application with unopened, full containers of paint. Because partially filled curing agent components are sensitive to moisture, there is a risk of reaction with atmospheric moisture, which can adversely affect the performance of the final film.
The surface temperature must always be maintained at least 3 °C (5 °F) above the dew point.
Ensure adequate ventilation when applying Interfine 878 in confined spaces.
When spray-applying multiple coats of Interfine 878, take care to ensure a continuous wet film and obtain a satisfactory coalesced film. Failure to do so may reduce the appearance and performance level.
Interfine 878 achieves satisfactory curing at a relative humidity between 40% and 85%. Curing is slower at low humidity and faster at high humidity.
Condensation on the surface during or after application will cause loss of gloss and a poor-quality film.
When recoating after weathering or ageing, ensure that the coating is thoroughly cleaned to remove all surface contaminants such as oil, grease, crystalline salts and road grime before applying the subsequent Interfine 878 coat.
Premature exposure to standing water may cause colour change, especially for dark colours and at low temperatures.
The product is not recommended for continuous immersion service.
Where long-term exposure to chemical or solvent splashes may occur, contact International Paint Industrial Coatings for stability information. Note: VOC values are typical and for guidance only. The value may vary with factors such as colour differences and normal 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 878 may be applied over a limited range of intermediate coats.
The absolute maximum recoat interval for Interfine 878 depends on the primer/intermediate coat. Before use, refer to the relevant primer/intermediate coat product data sheet and the recommended operating procedure for Interfine 878.
Suitable intermediate coats include:
| Intercure 200 | Interseal 670HS |
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| Intercure 200HS | Interzone 505 |
| Intergard 475HS | Interzone 954Interplus 356. For other suitable primers/intermediate coats, consult International Paint Industrial Coatings. |
| For further information on the industry standards, terms and abbreviations used in this datasheet, see www.international-pc.com | Found in the following documents provided on the website: • Definitions and abbreviations • Surface preparation • Coating application • Theoretical and practical spreading rate • Interfine 878 application instructions. 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 | 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 | 25.4 kg | 3.7 kg |
| 5 US gal | 54.7 lb | 7.7 lb |
| Shelf life | Component A: at least 12 months at 25°C (77°F). |
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Component B: at least 6 months at 25°C (77°F), after which inspection is required. Store in a dry, cool environment away from heat and ignition sources.
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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 factory product codes for Interfine 878 Acrylic Polysiloxane 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 |
|---|---|---|
| SZB000 | White | 20 L |
| SZL549 | Signal Green | 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.
