Interzinc 22 Inorganic Zinc-Rich Primer is a zinc-rich primer. This zinc-rich powder primer can be used with various high-performance coating systems and topcoats, for protection of newbuildings and structures under maintenance and repair, including bridges, storage tanks, pipelines, offshore equipment and steel structures. It is a two-component, fast-applying, fast-curing solvent-borne inorganic silicate zinc-rich primer. Although low-molecular-weight reactive additives become part of the film when cured under normal environmental conditions, they also affect the VOC value as found by EPA Method 24 analysis. Parameters on this page: dry film thickness 50-75 µm (2-3 mil), theoretical spreading rate 8.40 m²/L, number of components: two-component.
Parameter source: AKZONOBEL original technical data sheet (TDS) for Interzinc 22 Inorganic Zinc-Rich Primer; spreading rate and other values are converted from TDS parameters and provided 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 | 63% |
|---|---|
| Dry Film Thickness | 50–75 µm (2–3 mils) |
| Theoretical Spreading Rate | 8.40 m²/L |
| VOC | 3.92 lb/gal (470 g/L) US EPA Method 24 21… |
| Density / Specific Gravity | 2.44 kg/L (20.4 lb/gal) |
| Number of Components | Two-component |
| Thinner | Available only in some regions. Do not thin beyond the limit permitted by local environmental regulations |
| Mixing Ratio | 3.1 parts : 1 part (by volume) recommended mixing ratio; always mix in the supplied ratio… |
| Colour / Appearance | Green-grey, INTERZINC 22 |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
One of the Interzinc 22 series products.
It is a two-component, fast-applying, fast-curing solvent-borne inorganic silicate zinc-rich primer. The zinc powder content in the dry film meets the requirements of SSPC Paint 20 Level 1.
The zinc powder meets ASTM D520, Type II.
"This zinc-rich primer can be used in combination with a wide range of high-performance coating systems and topcoats for the protection of new-build and maintenance structures, including bridges, storage tanks, pipelines, offshore equipment and steel structures. According to International Paint's chemical resistance guidance, (Interzinc 22) can also be used as a lining coating for transporting various chemicals (such as styrene), providing excellent corrosion protection to properly prepared steel structures; with an appropriate topcoat applied, it can withstand temperatures up to 540 °C (1004 °F). This fast-drying primer can be used in a wide range of climatic conditions"Interzinc 22 is suitable for the interior walls of tanks dedicated to methanol and ethanol."
| Colour | Green-grey, INTERZINC 22 |
|---|---|
| Gloss | Matt |
| Volume Solids | 63% |
| Typical thickness | Dry film 50–75 µm (2–3 mils), equivalent to wet film 79–119 µm (3.2–4.8 mils) |
| Theoretical Spreading Rate | At 75 µm dry film thickness and the stated volume solids: 8.40 m²/L; at 3 mils dry film thickness and the stated volume solids: 337 ft²/US gal |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray, air spray. Drying time; recommended topcoat recoat interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 5°C (41°F) | 30 min | 3 h | 18 h | Unlimited¹ |
| 15°C (59°F) | 20 min | 90 min | 9 h | Unlimited¹ |
| 25°C (77°F) | 10 min | 1 h | 4.5 h | Unlimited¹ |
| 40°C (104°F) | 5 min | 30 min | 1.5 h | Unlimited¹ |
¹ See Definitions and Abbreviations from the International Paint Protective Coatings division. The drying times above are measured at the stated temperatures and 55% relative humidity; at 5 °C they are measured at 60% relative humidity. Before recoating, confirm the film resistance reaches rating 4 by the ASTM D4752 MEK rub test. For recoat details, see the Product Characteristics section.
| Flash point (typical) | Component A 19 °C (66 °F); mixed 19 °C (66 °F) |
|---|---|
| Product weight | 2.44 kg/L (20.4 lb/gal) |
| Volatile Organic Compounds | 3.92 lb/gal (470 g/L) US EPA Method 24; 216 g/kg EU Solvent Emissions Directive content, 2010/75/EU; coating hazard GB 30981.2-S-Pb≤1000-NC, in compliance with GB 30981.2-2025. For further details, see the "Product Characteristics" section. |
All surfaces to be coated shall be clean, dry and free from contamination. Before application, all surfaces shall be assessed and prepared in accordance with ISO 8504:2019. Oil and grease shall be removed in accordance with the SSPC-SP1 solvent cleaning standard.
Blast cleaning: abrasive blast clean to Sa 2½ (ISO 8501-1:2007) or SSPC-SP6 (for ideal performance, blast clean to SSPC-SP10). If oxidation occurs between blast cleaning and application of Interzinc 22, the surface should be re-blasted to the specified visual standard.
Surface defects exposed during abrasive blasting must be ground, filled or treated by a suitable method.
Recommended surface roughness 40–75 µm (1.5–3.0 mils).
Shop-primed steel: Interzinc 22 is suitable for application on steel members freshly coated with zinc silicate shop primer.
If the zinc dust shop primer shows large-scale scattered breakdown or heavy zinc salts, the entire area must be fully sweep blasted.
Not suitable for recoating other types of shop primer; remove them completely by abrasive blasting.
Welds and damaged areas must be blast cleaned to Sa 2½ (ISO 8501-1:2007) or SSPC-SP6.
Damaged/repair areas: all damaged areas should be blast cleaned to Sa 2½ (ISO 8501-1:2007) or SSPC-SP6. However, small areas may be cleaned with power tools to Pt3 (JSRA SPSS:1984) or SSPC-SP11, provided the area is not polished. Then, apply the recommended epoxy zinc dust primer to
| repair the area | - Consult International Paint for specific advice. |
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| Mixing | Interzinc 22 is supplied in two containers: liquid base (Component A) and zinc powder (Component B). The zinc powder (Component B) should be slowly added to the liquid base (Component A) under mechanical stirring. Never add the liquid base to the zinc powder. Before application, the coating should be filtered; during spraying, the coating in the container should be stirred continuously. Once mixed, the coating should be used within the specified pot life. |
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| Mixing ratio | 3.1 parts : 1 part (by volume) recommended mixing ratio; always mix the product in the supplied ratio. |
| Pot life | 5°C (41°F) | 15°C (59°F) | 25°C (77°F) | 40°C (104°F) |
| 12 h | 8 h | 4 h | 2 h |
| Suitable for airless spray | Recommended: nozzle diameter 0.38–0.53 mm (15–21 thousandths of an inch); total paint pressure at the nozzle not less than 112 kg/cm² (1593 psi) |
|---|---|
| Air Spray | Recommended spray pump: Graco X-treme 40:1 or similar. Spray gun: DeVilbiss MBC-510 or JGA-510 (Binks 2100). Air cap: |
| (with pressure pot) | 704 or 765 (Binks 66SD or 68PB). Nozzle: E (1.8 mm), D (2.2 mm) or Binks 66, 67. |
| Brush | Applicable — for small-area repair only | Typical thickness 25–50 µm (1.0–2.0 mils) |
| Roller application | Not recommended | |
| Thinner | International GTA803, | Available only in some regions. Do not thin beyond the limit permitted by local environmental regulations |
International GTA415 or International GTA138
| Cleaner | Use a cleaning solvent that complies with local regulations. Consult the local representative for specific recommendations. |
|---|---|
| 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. |
| 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.
Before recoating, the product must be clean, dry and free of soluble salts and excessive zinc corrosion products.
The temperature of the surface to be coated must be at least 3 °C (5 °F) above the dew point.
When applying Interzinc 22 in confined spaces, ensure adequate ventilation.
The minimum overcoating interval depends on the relative humidity during curing.
In warm climates (generally above 28 °C (82 °F)), a certain amount of thinner may be added for ease of application; International GTA803 is recommended.
Before recoating, perform a solvent rub test in accordance with ASTM D4752. A rating of 4 indicates satisfactory cure for recoating.
If the relative humidity is below 55%, curing is hindered. Humidity can be increased with steam or water spray, but adding a low-humidity curing accelerator* is more effective. Recoat times at 15 °C (59 °F) are as follows;
| Relative humidity (%) | 20 | 30 | 40 |
| Minimum recoat interval | 24 h | 10 h | |
The Interzinc 22 application guide contains more information on expected curing time at low relative humidity.
Excessive Interzinc 22 film thickness or over-application causes cracking; once cracking occurs, the affected areas must be thoroughly removed by blasting, then recoated according to the original paint system.
Apply with care to avoid dry film thickness exceeding 125 µm (5 mils).
If the product is to be used under high-temperature conditions, the thickness of Interzinc 22 should be limited to 50 µm (2 mil). Without a topcoat, Interzinc 22 can withstand a long-term dry temperature of 400 °C (752 °F); however, if used as a primer for Intertherm 50, it can withstand a dry temperature of 540 °C (1004 °F).
Uncoated Interzinc 22 is not suitable for exposure to acidic or alkaline environments or long-term immersion in water.
This product holds the following specification certification: • AISC 348-04 Structural Joint Research Council specification, Class B coating. • UNE 48293 (Spain). Note: VOC values are typical and for guidance only. They may vary with factors such as colour differences 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.
*Available only in Europe, China, the Middle East, Africa and Russia.
When Interzinc 22 requires self-recoating due to low dry film thickness, the coating surface must be fresh and unweathered. A subsequent coat of Interzinc 22 at a minimum dry film thickness of 50 µm (2 mil) is required to ensure good film formation.
Before recoating with a recommended topcoat, ensure Interzinc 22 is fully cured (see above); if weathering has occurred, wash with fresh water to remove all zinc salts from the surface, and scrub with a bristle brush if necessary.
Typical compatible topcoats and intermediate coats are:
| Intercure 200 | Intergard 475HS |
|---|---|
| Intercure 420 | Intertherm 50 |
| Intergard 251 | Interseal 670HS |
| Intergard 269 | Intertherm 715, Intergard 345. In some cases, a mist coat of appropriate viscosity is required to reduce blistering. This depends on the ageing of Interzinc 22, surface roughness, and environmental conditions during curing and application. In addition, an epoxy sealer such as Intergard 269 can also be used to reduce blistering. |
For other suitable topcoats/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 | Available in the following documents on the website: • Definitions and abbreviations • Surface preparation • Coating application • Theoretical and practical spreading rate • Interzinc 22 application guide. Separate copies of these sections are available 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 | |
| 13.78 L | 10.42 L | 15 L | 3.36 L | 20 L |
| 5 US gal | 3.78 US gal | 5 US gal | 1.22 US gal | 5 US gal |
For other packaging sizes, contact AkzoNobel.
| Packaging Specifications | Component A | Component B |
| 13.78 L | 11.6 kg | 25.8 kg |
| 5 US gal | 34.4 lb | 72.4 lb |
| Shelf life | At least 12 months at 25 °C (77 °F). |
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Thereafter, inspection is required. Store in a dry, cool environment away from heat and sources of ignition.
© 2026/5/27 AkzoNobel. All rights reserved.
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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 article numbers of Interzinc 22 Inorganic Zinc-Rich Primer 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 |
|---|---|---|
| QHA285 | 027 Green Grey | 13.78 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.
