Interprime 538 Zinc Phosphate Primer is a primer. A conventional traditional primer for interior steelwork. A one-component alkyd primer containing zinc phosphate anticorrosive pigment. Parameters on this page: volume solids 57% ± 2%, dry film thickness 80 µm, theoretical spreading rate 7.13 m²/L. Comparable models from the same brand: Intertuf 203 vinyl anticorrosive paint, Interbond 201 - Temperate epoxy primer, Interbond 808 epoxy anticorrosive paint.
Parameter source: INTERNATIONAL original technical data sheet (TDS) for Interprime 538 Zinc Phosphate 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 | 57% ± 2% |
|---|---|
| Dry Film Thickness | 80 µm |
| Theoretical Spreading Rate | 7.13 m²/L |
| VOC | 348 g/L calculated; 226 g/kg (as-supplied liquid paint). EU Solvent Emissions… |
| Density / Specific Gravity | — |
| Number of Components | One-component |
| Mixing Ratio | N/A |
| Colour / Appearance | CPA536 red, CPA537 grey, CPA538 white |
| Gloss | N/A |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A one-component alkyd primer containing zinc phosphate anticorrosive pigment.
A conventional traditional primer for interior steelwork.
For newbuilding.
| Colour | CPA536 red, CPA537 grey, CPA538 white |
|---|---|
| Topcoat/gloss | N/A |
| Component B (curing agent) | N/A |
| Volume Solids | 57% ±2% (ISO 3233:1998) |
| Mixing ratio | N/A |
| Standard film thickness | 80 µm dry film thickness (140 µm wet film thickness) |
| Theoretical Spreading Rate | At 80 µm dry film thickness, the theoretical spreading rate is 7.13 m²/L, allowing appropriate loss factors |
| Application Methods | Airless spray, brush, conventional spray, roller |
| Flash Point | Single component 35 °C |
| Drying data | -5°C | 5°C | 25°C | 35°C |
| Touch dry [ISO 9117/3:2010] | 4 h | 60 min | 45 min | 30 min |
| Hard dry [ISO 9117-1:2009] | 7 days | 5 days | 3 days | 2 days |
| Recoat data — see the “Limitations” section | Substrate Temperature |
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| When recoating the following products | -5 °C minimum | -5 °C maximum | -5 °C minimum | 5 °C maximum | 25 °C minimum | 25 °C maximum | 35 °C minimum | 35 °C maximum |
| Interlac 542 | 48 h | Unlimited | 48 h | Unlimited | 24 h | Unlimited | 16 h | Unlimited |
| Interlac 665 | 48 h | Unlimited | 48 h | Unlimited | 24 h | Unlimited | 16 h | Unlimited |
| Intertherm 891 | 48 h | Unlimited | 48 h | Unlimited | 24 h | Unlimited | 16 h | Unlimited |
| Note | If the exterior exposure time exceeds 28 days, the primer surface shall be washed with fresh water to achieve the "extended" overcoating interval requirement. |
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| Volatile Organic Compounds | 348 g/L calculated; 226 g/kg (as-supplied liquid paint). EU Solvent Emissions Directive (Commission Directive 1999/13/EC); 342 g/L China national standard GB 23985. Volatile organic compound values are typical and provided for reference only. They may vary with factors such as colour and normal manufacturing tolerances. |
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Coating hazards GB 30981.2-S-Pb≤1000-NC; complies with GB 30981.2-2025
When used as part of an approved scheme, the coating holds the following certificates: • Fire resistance - complies with low flame spread requirements (Exova Warringtonfire) • Fire resistance - complies with the Marine Equipment Directive. For details, consult the local International Paint representative.
For the paint system best suited to the surface to be protected, consult your local International Paint representative.
Applied in accordance with the standard Worldwide Marine Specifications.
All surfaces to be coated must be clean, dry and free of contaminants.
Wash with high-pressure or ordinary fresh water as appropriate, and remove all oil, grease, soluble contaminants and other foreign matter in accordance with the SSPC-SP1 solvent cleaning standard.
On newbuildings, remove weld spatter and grind welds and sharp edges smooth where required.
Prepare welds and damaged shop primer to Pt3 (JSRA SPSS:1984) by power tool.
For specific advice, consult your local International Paint representative.
Note: for marine environments in North America, the following surface preparation standard may be used: SSPC-SP3 instead of St3 (ISO 8501-1:2007).
This coating is a single-component product; stir thoroughly with a power mixer before application.
International GTA004. Normally no thinning is required. Under extreme conditions, consult your local representative for application advice. Do not thin beyond the limits of local environmental regulations.
Recommended nozzle tip size 0.46–0.53 mm (18–21 thou); total fluid pressure at the nozzle not less than 176 kg/cm² (2500 psi)
Suitable.
Use suitable dedicated equipment. Thinning may be required.
When applying Interprime 538 by brush, multiple coats may be necessary to achieve the specified total dry film thickness.
When applying Interprime 538 by roller, multiple coats may be required to achieve the specified total dry film thickness.
Use a cleaning solvent that complies with local regulations. Consult the local representative for specific recommendations.
Flush all equipment thoroughly with International thinner. All unused paint must be stored in tightly closed containers. Partly filled containers may show skinning and/or increased viscosity after storage. Strain the paint before use.
If welding or flame cutting is performed on metal coated with this product, dust and fumes will be released; use suitable personal protective equipment and local exhaust ventilation. In North America, follow the instructions in ANSI/ASC Z49.1 “Safety in Welding and Cutting”.
All work related to the application and use of this product must comply with national health, safety and environmental protection standards and regulations.
Before using this product, obtain, read and follow the health and safety information in the Material Safety Data Sheet for the product. Read and observe all precautions in the Material Safety Data Sheet and on the container label. If these warnings and requirements are not fully understood, or cannot be strictly observed, do not use the product. During application and drying of the product, provide adequate ventilation and protective measures to keep solvent vapour concentrations within safe limits, so as to prevent poisoning or oxygen deficiency. Take protective measures to avoid skin and eye contact with the product (e.g. gloves, goggles, face shield, barrier cream). Specific safety measures depend on the application method and working environment.
Emergency contact: USA/Canada — medical 1-800-854-6813; Europe — tel. (44) 191 4696111, hospital and doctor (44) 207 6359191; China — tel. (86) 532 83889090; other regions — contact the regional office.
The product must not be used on exterior steelwork.
Recoat data are for guidance only and depend on local climatic and environmental conditions. For specific advice, consult your local International Paint representative.
Apply in good weather. The temperature of the surface to be coated must be at least 3 °C above the dew point. Unless otherwise specifically instructed, raise the paint temperature to between 21 and 27 °C before mixing and application to achieve optimum application performance. Unmixed paint (in sealed containers) must be stored protectively as specified in the Storage section of this product data sheet. The technical and application data given here are intended as general guidance for establishing an application procedure. Test results are obtained in a controlled laboratory environment, and International Paint does not claim that the published test results, or any other test results, accurately represent results obtained in all site environments. Because application, environmental and design parameters vary widely, care must be exercised in coating selection, performance verification and use.
In the Recoat Data section, unlimited = 'ext'. See the Marine Painting Guide — Definitions and Abbreviations available on our website.
Packaging size volume; packaging
| 20 L | 20 L. For other packaging sizes, consult International Paint. |
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| Packaging Specifications | Packaging weight |
|---|---|
| 20 L | 32.8 kg |
| Shelf life | At 25 °C, minimum 24 months. Thereafter, re-inspection is required. Store in a dry, sheltered place away from heat 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.
The factory item codes of Interprime 538 Zinc Phosphate 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 |
|---|---|---|
| CPA536 Red | — | 20 L |
| CPA537 Grey | — | 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.
