Interdur 8805 Zinc-rich Primer is a zinc-rich primer of the inorganic zinc silicate system. This zinc-rich primer can be used with a variety of high-performance coating systems and topcoats, and is suitable for new construction and maintenance projects, including bridges, tanks, pipelines and steel structures. It is a two-component, fast-recoat, fast-drying solvent-borne inorganic silicate zinc-rich primer complying with SSPC Paint 20 Level 3 requirements. When relative humidity is below 55%, curing will be severely delayed; measures such as steam or water spraying are required to increase humidity. Parameters on this page: dry film thickness 50–75 µm (2–3 mils), theoretical spreading rate 8.40 m²/L, number of components two-component.
Parameter source: AKZONOBEL original technical data sheet (TDS) 'Interdur 8805 Zinc-rich Primer'; 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 | 63% |
|---|---|
| Dry Film Thickness | 50–75 µm (2–3 mils) |
| Theoretical Spreading Rate | 8.40 m²/L |
| VOC | 4.08 lb/gal (490 g/L) US EPA Method 24, 24… |
| Density / Specific Gravity | 2.15 kg/L (17.9 lb/gal) |
| Number of Components | Two-component |
| Thinner | International GTA803. Do not thin beyond the limit permitted by local environmental regulations… |
| Mixing Ratio | 5.70 parts : 1 part (by volume) |
| Gloss | Matt |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
This is a two-component, fast overcoating, fast-drying solvent-borne inorganic zinc silicate zinc-rich primer, meeting the Level 3 requirements of SSPC Paint 20.
Zinc dust complies with ASTM D520, Type II
This zinc dust primer can be used with various high-performance coating systems and topcoats, for new construction and maintenance projects, including bridges, storage tanks, pipelines and steel structures. As a fast-curing primer, it can be used in various climatic conditions.
INTERDUR Colour Green Grey 8805
| 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, brush. Drying time and recommended topcoat recoating 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 | 60 min | 4.5 h | Unlimited¹ |
| 40°C (104°F) | 5 min | 30 min | 90 min | 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 13 °C; Component B not applicable; after mixing 13 °C |
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| Product weight | 2.15 kg/L (17.9 lb/gal) |
| Volatile Organic Compounds | 4.08 lb/gal (490 g/L) US EPA Method 24 249 g/kg EC Solvent Emissions Directive content 1999/13/EC 504 g/L Chinese National Standard GB 23985. For more detailed information, please refer to the section on "Product Characteristics". |
All surfaces of the steel substrate to be coated must be clean, dry and free of contamination. Before painting, all surfaces must be assessed and prepared in accordance with GB 18839-2002.
Remove any oil and grease by solvent cleaning in accordance with GB 18839-2002.
Blast cleaning: Blast clean to Sa2.5 (GB8923-1:1998). If after blast cleaning, before applying Interdur 8805, oxidation occurs on the steel surface, the surface should be re-blasted to achieve the specified visual surface.
Surface defects exposed during blasting must be ground, filled or treated by a suitable method.
Recommended surface profile 40–75 µm.
Shop-primed steel structures: Interdur 8805 is suitable for steel components freshly coated with zinc silicate shop primer.
If the zinc-containing shop primer has suffered extensive breakdown, or produced large amounts of zinc salts, a full sweep blast is required.
Welds and damaged areas shall be blast-cleaned to Sa2.5 (GB 8923-1:1988).
Damaged/repair areas: All damaged areas should preferably be blast cleaned to Sa2.5 (GB8923-1:1998), however, small areas may be power tool cleaned to GB18839-2003, provided the area is not polished. Then, repair the area with the recommended epoxy zinc-rich primer. Please consult International Paint Protective Coatings for specific recommendations.
| Mixing | Interdur 8805 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 reverse the order by adding the liquid base to the zinc powder. |
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Strain the coating before application, and keep stirring the coating in the container during spraying. Once mixed, use within the specified pot life.
| Mixing ratio | 5.70 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) |
| 12 h | 8 h | 4 h | 2 h |
| Suitable for airless spray | Recommended nozzle diameter 0.43–0.53 mm (17–21 mils). Total paint pressure at the nozzle not less than 112 kg/cm² (1593 psi). |
|---|---|
| Brush | Suitable - for small area repair only. Typical thickness No metric value exists for Brush.MinDFT-No metric value exists for Brush.MaxDFT µm (Noimperial value exists for Brush.MinDFT-Noimperial value exists for Brush.MaxDFT mils) |
| Thinner | International GTA803. Dilution shall not exceed local environmental regulations (or GTA 415). |
| Cleaner | International GTA803 (or GTA 415) |
| Interruption of work | Do not leave paint in hoses, spray guns or spray equipment. Flush all equipment thoroughly with International GTA803. |
Once mixed, a batch of paint shall not be re-sealed; if work is interrupted for too long, remix a fresh batch of paint.
| Cleaning | All equipment should be cleaned immediately after use with International GTA 803. Flushing spray equipment periodically during daily work is good practice. Cleaning frequency depends on the volume sprayed, temperature, spraying time, including interruptions, and other factors. |
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All surplus paint and empty containers must be disposed of in accordance with the appropriate 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 Interdur 8805 in confined spaces, ensure adequate ventilation.
The minimum overcoating interval depends on the relative humidity during curing. Before overcoating, a solvent rub test according to ASTM D4752 is recommended. A test result of 4 indicates satisfactory cure and that overcoating may proceed.
Below 55% relative humidity, curing will be severely retarded; measures such as steam or water misting are required to raise the humidity.
Excessive film thickness or overcoating of Interdur 8805 can cause cracking. Once cracking occurs, the affected areas must be completely removed by blasting, and then recoated according to the original coating system.
Apply with care to avoid dry film thickness exceeding 125 µm (5 mils).
Interdur 8805 without topcoat is not suitable for exposure to acid or alkali environments or long-term immersion in water.
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.
Due to the low film thickness, when self-recoating with Interdur 8805 is required, the surface must be unweathered coating and newly applied coating. The minimum dry film thickness of the subsequent coat of Interdur 8805 must be 50 µm (2 mils) to ensure good film formation.
Before recoating with the recommended topcoat, ensure that Interdur 8805 is fully cured (see previous paragraph). If weathering has occurred, all zinc salts should be washed off with fresh water, and if necessary, scrubbed with a bristle brush.
Typical topcoats are: Interdur 8801, Interdur 8840. In some cases, it is necessary to apply a tie coat with suitable viscosity to minimize blistering. This depends on the curing time of Interdur 8805, surface roughness, and environmental conditions during application and curing. An epoxy tie coat, such as Interthane 8801, can be selected to reduce blistering problems.
For other suitable topcoats, please consult International Paint Industrial Coatings.
| 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, consult International Paint.
| Packaging Specifications | Component A | Component B | ||
| Volume | Packaging | Volume | Packaging | |
| 10 L | 8.51 L | 10 L | 1.49 L | 10 L |
For other available packaging sizes, contact International Paint.
| Packaging Specifications | Component A | Component B |
| 10 L | 12 kg | 11.6 kg |
| Shelf life | Component A: at least 6 months at 25 °C (77 °F). Component B: minimum 12 months at 25 °C. |
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Thereafter, the product shall be checked before use. 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.
