Interdur 8801 Protective Primer after Abrasive Blasting is an epoxy coating used as a primer. It can also serve as a tie coat on zinc silicate coatings, preventing the formation of zinc salts on aged coatings and pinholes in subsequent high-build topcoats. Recoating remains possible after prolonged ageing. When applying to steel at high ambient temperatures, thinning with International thinner may be required to prevent dry spray and control film thickness. The product does not cure fully at temperatures below 5°C (41°F). Parameters on this page: theoretical spreading rate 11.75 m²/L, number of components two-component.
Parameter source: AKZONOBEL manufacturer's Technical Data Sheet (TDS) "Interdur 8801 Protective Primer after Abrasive Blasting"; values such as spreading rate are converted from TDS parameters and are 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 | 47% |
|---|---|
| Dry Film Thickness | — |
| Theoretical Spreading Rate | 11.75 m²/L |
| VOC | 3.75 lb/gal (450 g/L) US Environmental Protection Agency Method 24, 29… |
| Density / Specific Gravity | 1.53 kg/L (12.8 lb/gal) |
| Number of Components | Two-component |
| Thinner | Do not exceed the thinning limits of local environmental regulations |
| Mixing Ratio | 4 parts : 1 part (by volume) |
| Gloss | Matt |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A two-component, fast-drying epoxy primer.
Can be recoated after long-term ageing.
As a holding primer over blast-cleaned steel, suitable for immersion and exposed service, and compatible with other products in various high-performance anti-corrosion systems.
Suitable for both new structures and maintenance of existing metal structures.
May also be used as a tie coat over zinc silicate coatings, preventing zinc salt formation on aged coatings and pinholes in subsequent high-build topcoats.
INTERDUR Colour Red 8801
| Gloss | Matt |
|---|---|
| Volume Solids | 47% |
| Typical thickness | 40 µm (1.6 mil) DFT corresponds to 85 µm (3.4 mil) WFT |
| Theoretical Spreading Rate | At 40 µm dry film thickness and the stated volume solids, 11.75 m²/L; at 1.6 mil dry film thickness and the stated volume solids, 471 ft²/US gal |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray, air spray, brush, roller. Drying time; recommended topcoat recoat interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 10°C (50°F) | 40 min | 16 h | Unlimited¹ | |
| 15°C (59°F) | 35 min | 12 h | Unlimited¹ | |
| 25°C (77°F) | 30 min | 8 h | Unlimited¹ | |
| 40°C (104°F) | 15 min | 1 h | 4 h | Unlimited¹ |
¹ When polysiloxane topcoats are used, the maximum recoat interval is reduced. For details, consult International Paint.
| Flash point (typical) | Component A 26 °C (79 °F); Component B 25 °C (77 °F); mixed 26 °C (79 °F) |
|---|---|
| Product weight | 1.53 kg/L (12.8 lb/gal) |
| Volatile Organic Compounds | 3.75 lb/gal (450 g/L) US Environmental Protection Agency Method 24; 293 g/kg EC Solvent Emissions Directive, Council Directive 1999/13/EC; 420 g/L China national standard GB 23985. For further details, see the section on "Product Characteristics" |
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.
Abrasive blast cleaning: for immersion service, Interdur 8801 must be applied to surfaces blast-cleaned to Sa2.5 (GB 8923-1:1988) or SSPC-SP10. However, for atmospheric exposure, Interdur 8801 may be applied to ****** surfaces.
Ultra-high pressure water jetting (for non-immersion service only): may be used on surfaces prepared to Sa2 (GB 8923-1:1988), where the degree of spot rusting on these surfaces shall be higher than HB2M (refer to International's water jetting standard); consult the International coatings department for details.
Application as a tie coat: when applied over zinc-containing primers, remove weld spatter as necessary, grind welds and sharp edges smooth, then blast-clean welds and other damaged primer areas to Sa2.5 (GB 8923-1:1988). The primer surface shall be dry and free from contamination (oil, grease, salts). Apply Interdur 8801 within the recoat interval specified for that primer (refer to the relevant product data sheet). Before application, ensure the zinc-containing primer is fully cured, clean, dry and free from zinc salts.
Apply (refer to the relevant product data sheet). Before application, ensure the zinc-containing primer is fully cured, clean, dry and free from zinc salts.
| 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 | 4 parts : 1 part (by volume) |
|---|
| Pot life | 10°C (50°F) | 15°C (59°F) | 25°C (77°F) | 40°C (104°F) |
| 17 h | 12 h | 8 h | 3 h |
| Suitable for airless spray | Recommended nozzle tip size 0.38–0.53 mm (15–21 thou); total paint pressure at the nozzle not less than 141 kg/cm² (2005 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 | |
| Brush | Applicable — for small-area repair only | Typical thickness 25–30 µm (1.0–1.2 mils) | |
| Roller application | Applicable — for small-area repair only | Typical thickness 25–30 µm (1.0–1.2 mils) | |
| Thinner | International GTA220 | Do not exceed the thinning limits of local environmental regulations | |
| (or International |
GTA415)
| Cleaner | International GTA822 (or International GTA415) |
|---|---|
| Interruption of work | Do not leave paint in hoses, spray guns or spray equipment. Flush all equipment thoroughly with International GTA822. 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 GTA822. 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. |
Surplus paint and empty containers must be disposed of in accordance with the relevant regional regulations.
Use as a temporary protective primer: Interdur 8801 is suitable as a blast protective primer for steel structures in immersion and atmospheric environments. Apply Interdur 8801 at the recommended thickness, since excessive film build produces a glossy surface that is unsuitable for recoating after ageing.
When coating steel at high ambient temperatures, thinning with International thinner may be required to prevent dry spray and control film thickness. This product does not cure adequately below 5 °C (41 °F). For optimum performance, curing should take place above 10 °C (50 °F).
Interdur 8801 is also suitable for stainless steel and galvanized steel that has been degreased and abraded. Light blasting with non-metallic abrasive may be used for abrading; for small areas, a corundum grinding wheel may be used.
Use as a tie coat: to ensure good penetration into zinc silicate coatings, Interdur 8801 shall be thinned 15–25% with International thinner. Interdur 8801 shall cure before the high-build topcoat is applied; otherwise its effectiveness in preventing pinholes is reduced.
Avoid excessive film thickness, otherwise cracking may occur when recoated with a high-build coating.
For application below 10 °C (50 °F), other tie coats are available. Contact International Paint for information.
Interdur 8801 is available in red; other colours can be supplied on request. For details, consult International Paint Industrial Coatings.
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.
Interdur 8801 is suitable for application over the following primers: Interdur 8815. The following topcoats/intermediate coats are recommended for Interdur 8801: Interdur 8840, Interdur 8843SG, Interdur 8860, Interdur 8862. For details of other coating systems, 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 | |
| 20 L | 16 L | 20 L | 4 L | 5 L |
For other available packaging sizes, contact International Paint.
| Packaging Specifications | Component A | Component B |
| 20 L | 28.9 kg | 4.1 kg |
| Shelf life | At 25 °C (77 °F), 12 months, after which 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.
