Interdur 8812 Temporary Protective Primer is an inorganic zinc silicate coating used as a primer. Suitable for overcoating with various high-performance coating systems in various environments, including offshore facilities, marine environments, chemical and petrochemical plants, power stations and bridges. A fast-drying, two-component, weldable zinc silicate shop primer, applied manually or automatically. Note that this product dries too fast to measure the exact wet film thickness; failure to obtain a uniform film and surface roughness leads to rapid rusting on exposure to weather. Parameters on this page: dry film thickness 10–25 µm (0.4–1 mil), theoretical spreading rate 18.67 m²/L, number of components two.
Source: AkzoNobel original technical data sheet (TDS) "Interdur 8812 Temporary Protective Primer"; spreading rate and other values 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 | 28% |
|---|---|
| Dry Film Thickness | 10–25 µm (0.4–1 mil) |
| Theoretical Spreading Rate | 18.67 m²/L |
| VOC | 5.15 lb/gal (618 g/L) US EPA Method 24 60… |
| Density / Specific Gravity | 1.5 kg/L (12.5 lb/gal) |
| Number of Components | Two-component |
| Thinner | Do not exceed the thinning limits of local environmental regulations |
| Mixing Ratio | 1 part : 1 part (by volume) |
| Gloss | Matt |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A fast-drying, two-component, weldable zinc silicate shop primer, suitable for manual or automatic spraying.
As a temporary protective primer, suitable for application before the prefabrication of steel structures.
The product is suitable for overcoating with various high-performance coating systems, for use in various environments (including offshore installations, marine environments, chemical and petrochemical plants, power stations and bridges).
INTERDUR colour grey 8812
| Gloss | Matt |
|---|---|
| Volume Solids | 28% |
| Typical thickness | DFT 10–25 µm (0.4–1 mil) corresponds to WFT 36–89 µm (1.4–3.6 mil) |
| Theoretical Spreading Rate | 18.67 m²/L at 15 µm dry film thickness and the stated volume solids; 749 ft²/US gal at 0.6 mil dry film thickness and the stated volume solids |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray, roller, air spray, brush and conventional spray. Drying time: recommended topcoat overcoating interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 10°C (50°F) | 3 min | 8 min | 24 h | Unlimited¹ |
| 15°C (59°F) | 3 min | 8 min | 24 h | Unlimited¹ |
| 25°C (77°F) | 3 min | 5 min | 24 h | Unlimited¹ |
| 40°C (104°F) | 3 min | 4 min | 24 h | Unlimited¹ |
¹ See Definitions and Abbreviations from the International Paint Protective Coatings division.
| Flash point (typical) | Component A 5 °C (41 °F); Component B −18 °C (0 °F); mixed −18 °C (0 °F) |
|---|---|
| Product weight | 1.5 kg/L (12.5 lb/gal) |
| Volatile Organic Compounds | 5.15 lb/gal (618 g/L) US EPA Method 24. 609 g/L, calculated value. 631 g/L. Chinese national standard GB 23985. For further details, see the "Product Characteristics" section. |
All surfaces 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.
If grease is present, clean with solvent per GB 18839-2002. Where necessary, remove weld spatter and smooth welds and sharp edges.
Blast cleaning: blast to Sa 2.5 (GB 8923-1:1998). If the steel surface oxidises after blasting and before overcoating with Interdur 8812, the surface shall be re-blasted to the specified visual standard. Surface defects exposed during blasting shall be ground, filled or treated in a suitable manner.
The blasted surface shall have an angular profile. The blasting medium shall be steel grit with a nominal particle size of 0.6–1.0 mm (24–40 mil), or a steel grit/shot mixture with a nominal particle size of 0.6–1.0 mm (24–56 mil).
This product is not recommended for hand-prepared steel.
| Mixing | Interdur 8812 is supplied in two parts: a paste component (component A) and a liquid base component (component B). Slowly add the liquid base (component B) to the paste component (component A) under mechanical stirring. Do not add the paste component to the liquid component. Strain the paint before application, and keep stirring during spraying. Once a kit has been mixed, use it within the specified pot life. |
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This is a low-viscosity material, and stirring is required during application to maintain uniformity.
| Mixing ratio | 1 part : 1 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) |
| 7 h | 6 h | 4.5 h |
| Suitable for airless spray | Recommended: for automatic equipment, tip size 0.53–0.64 mm (21–25 thou); for manual application, tip size 0.43–0.53 mm (17–21 thou); total paint pressure at the nozzle not less than 70 kg/cm² (995 psi) |
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| Air Spray | Recommended | Spray gun | DeVilbiss MBC or JGA |
| Air nozzle | 704 or 765 | ||
| (with pressure pot) | Spray painting | E | |
| Air spray (conventional) | Recommended | Use suitable dedicated equipment. | |
| Brush | Applicable | For small areas or touch-up repair only. | |
| Roller application | Applicable | For small areas or touch-up repair only. | |
| Thinner | International GTA136 | Do not exceed the thinning limits of local environmental regulations |
| Cleaner | International GTA803 |
|---|---|
| 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.
Satisfactory welding performance is achieved only with strict control of the coating at the recommended film thickness. Over-application of Interdur 8812 increases fumes during welding or cutting and increases weld porosity. Interdur 8812 is designed for automatic equipment; for small-area manual spraying, avoid dry spray and over-application.
Note that this product dries too quickly for an accurate wet film thickness to be measured. If a uniform film and surface profile are not achieved, rapid rusting will occur on exposure to weather.
The drying times given apply to the recommended dry film thickness using an automated process at the stated temperature. Failure to follow these parameters may cause damage to equipment and rollers and cracking of the painted surface due to handling damage during stacking. Optimum results are obtained by preheating the steel substrate to 40 °C (104 °F).
A thicker film of Interdur 8812 provides longer corrosion resistance, but affects welding, cutting and fabrication performance. In most environments, 25 µm (1 mil) is the recommended dry film thickness for 6–9 months of protection.
Below 50% relative humidity, satisfactory curing for overcoating cannot be achieved within 24 hours. Curing is severely hindered below 50% relative humidity; steam or water spraying may be needed to raise the relative humidity. Note that this product dries too fast to measure the exact wet film thickness. Premature exposure of Interdur 8812 to standing water causes discolouration, which may be permanent. This only affects the surface appearance and does not affect the anti-corrosion performance of Interdur 8812.
For more spraying information and weathering performance, contact the International Paint Protective Coatings Division.
Note: VOC values are typical and for guidance only. They may vary with colour and general production tolerances.
Interdur 8812 can be overcoated with various systems, suitable for the protection of steel in various environments.
Suitable intermediate coats are: Interdur 8801, Interdur 8840
| 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 | |
| 20 L | 10 L | 20 L | 10 L | |
For other available packaging sizes, contact International Paint.
| Packaging Specifications | Component A | Component B |
| 20 L | 21.89 kg | 9.31 kg |
| Shelf life | At 25 °C (77 °F), component A 12 months, component B 6 months. Use only after inspection thereafter. Store in a dry, cool environment, away from heat sources and sources of ignition. |
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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.
