A shop (prefabrication) primer for protection of steel during fabrication and assembly. Excellent weldability and cuttability; withstands damage caused by welding, gas cutting and grinding, thus reducing the need for secondary surface preparation compared with general zinc silicate products. Parameters on this page: volume solids 23% ± 2%, dry film thickness 13 µm, theoretical spreading rate 17.69 m²/L. Comparable products of the same brand: Interbond 201 - Low Temperature Epoxy Primer/Topcoat, Intercryl 559 Smooth Washable Topcoat, Intergard 7020 Abrasion-resistant Aluminium Pure Epoxy.
Data source: International original Technical Data Sheet (TDS), "Interplate 937 Zinc Silicate Shop (Prefabrication) Primer"; spreading rate and other values are converted from the TDS parameters, 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 | 23% ± 2% |
|---|---|
| Dry Film Thickness | 13 µm |
| Theoretical Spreading Rate | 17.69 m²/L |
| VOC | 649 g/L (neat coating) (EPA Method 24) 519 g/kg (… |
| Density / Specific Gravity | — |
| Number of Components | Two-component |
| Mixing Ratio | Component A : Component B = 0.60:1 (by volume) |
| Colour / Appearance | NQA933-Grey NQA934-Brown (available only in the US and Europe) NQA931… |
| Gloss | Matt |
The manufacturer's datasheet for this model does not state the coating position or resin type, so it has not been assigned to the above categories. Browse similar products by category, orContact Usconfirm the coating system.
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A two-component, heat-resistant, zinc silicate shop (prefabrication) primer with good corrosion resistance (even after heating to 800 °C), producing the least zinc salts. Excellent weldability and cuttability; withstands damage caused by welding, gas cutting and grinding, thus reducing the need for secondary surface preparation compared with general zinc silicate products.
A shop (prefabrication) primer for the protection of steel during fabrication and erection.
Suitable for use with impressed current cathodic protection.
For newbuilding.
| Colour | NQA933-Grey NQA934-Brown (available only in the US and Europe) NQA931-Light green, NQA939-Blue (available only in the US.) |
|---|---|
| Topcoat/gloss | Matt |
| Component B (curing agent) | NQA936 |
| Volume Solids | 23% ±2% (ISO 3233:1998) |
| Mixing ratio | Component A : Component B = 0.60:1 (by volume) |
| Standard film thickness | 13 µm dry film thickness (57 µm wet film thickness) |
| Theoretical Spreading Rate | At 13 µm dry film thickness, the theoretical spreading rate is 17.69 m²/L, allowing an appropriate loss factor. |
| Application Methods | Airless spray, brush, conventional spray, roller |
| Flash Point | Component A 10 °C; Component B 14 °C; mixed 13 °C (for products manufactured and supplied in North America, due to the use of local solvents, the flash points are Component A 14 °C, Component B 15 °C and mixed 14 °C. |
no adverse effect on product performance).
| Induction Time | Not required |
|---|
| Drying data | 5°C | 10°C | 25°C | 35°C |
| Hard dry [ISO 9117-1:2009] | 5 min | 4 min | ||
| Pot life after mixing | 24 h | 8 h | ||
| Recoat data — see the “Limitations” section | Substrate Temperature | |||||||
| 5°C | 10°C | 25°C | 35°C | |||||
| When recoating the following products | Minimum | Maximum | Minimum | Maximum | Minimum | Maximum | Minimum | Maximum |
| Note | Consult International Paint; for a suitable primer, a minimum of 7 days. |
|---|
| Volatile Organic Compounds | 649 g/L (neat coating) (EPA Method 24) 519 g/kg (neat liquid paint). EU Solvent Emissions Directive (Commission Directive 1999/13/EC). VOC values are typical values provided for reference only. They may vary with factors such as colour and normal manufacturing tolerances. |
|---|
When used as part of an approved scheme, this coating has the following certificates: • Weld quality – approval of prefabrication primer (LR) • Weld quality – shop primer for welded steel structures (BV) • Weld quality – shop primer for anti-corrosion of steel plates and members (DNV). For details, consult your 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.
The shop primer for newbuildings shall be applied with automatic blast/spray equipment.
Blast clean to at least Sa 2.5 (ISO 8501-1:2007). Typically blast with steel grit of particle size 0.6–1.0 mm or a mixture of steel grit of 0.6–1.0 mm and steel shot of 0.6–1.4 mm to obtain a distinctly angular surface profile.
Apply Interplate 937 before oxidation occurs. If oxidation has indeed occurred, the entire oxidized area shall be re-blasted to the standard specified above.
Ensure the area is clean and dry before applying Interplate 937.
For specific advice, consult your local International Paint representative.
Note: for the marine environment in North America, the following surface preparation standard may be used: SSPC-SP10 in place of Sa 2.5 (ISO 8501-1:2007)
The paint is packed in two containers and supplied as one unit. Always mix the whole unit according to the provided ratio. Stir the pigment paste (Component A) with a power stirrer, and slowly add the base (Component B) while stirring. Continue stirring for at least 5 minutes, and filter through a 30–60 mesh screen before use. Continue stirring during use.
GTA820 (winter type), GTA840 (summer type) (US). Not recommended. Only in special cases, use International GTA820, GTA840 (up to 15% by volume). Do not thin beyond local environmental regulations.
Recommended nozzle tip size 0.38–0.58 mm (15–23 thou); total fluid pressure at the nozzle not less than 60–100 kg/cm² (850–1420 psi)
Use suitable dedicated equipment. Thinning may be required.
Brush application is recommended for small areas only. Several coats may be required to achieve the specified film thickness.
Roller application is recommended for small areas only. Several coats may be required to achieve the specified film thickness.
Do not let paint remain in the hose, spray gun or spray equipment. Flush all equipment thoroughly with International GTA820 or GTA840 (US). Once a batch of paint has been mixed, it should not be resealed; if the interruption during application is too long, it is recommended to remix the components before resuming application.
All equipment shall be cleaned with International GTA820 or GTA840 (US) immediately after use. Flushing all spray equipment periodically during a day's work is good practice. The number of cleaning cycles depends on spray quantity, temperature and usage time (including delays). Do not exceed the pot life of the mixed paint. All leftover paint and empty containers shall be disposed of according to local applicable regulations/laws.
Hot work: welding, flame cutting or grinding flush on metal coated with this product produces dust and fumes; use suitable personal protective equipment and local exhaust ventilation. In North America, follow 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.
Drying time depends on the substrate temperature and ventilation.
If the relative humidity is below 50%, curing will be retarded.
Manual spraying is not recommended for applying Interplate 937.
Higher dry film thickness may affect fabrication performance (welding and cutting).
Shop primer is not recommended as a repair primer after fabrication.
Recoat data are for guidance only and depend on local climatic and environmental conditions. For specific advice, consult your local International Paint representative.
The surface temperature to be coated shall be at least 3 °C above the dew point. Unless otherwise instructed, for optimum application performance, bring the paint temperature to 21–27 °C before mixing and application. Unmixed paint (in tightly closed containers) shall be stored as specified in the 'Storage' section of this data sheet.
| Packaging Specifications | Component A | Component B | ||
| Volume | Packaging | Volume | Packaging | |
| 20 L | 7.5 L | 20 L | 12.5 L | 15 L |
| 5 US gal | 1.88 US gal | 5 US gal | 3.13 US gal | 3.5 US gal |
For other packaging sizes, consult International Paint.
| Packaging Specifications | Packaging weight |
|---|---|
| 20 L | 27.88 kg |
| 5 US gal | 58 lb |
| Shelf life | Requires low-flash storage. |
|---|
Component A – at 25 °C or below, minimum 12 months from the date of manufacture.
Component B – at 25 °C or below, minimum 6 months from the date of manufacture.
Thereafter, re-inspection is required. Store in a cool, dry place away from heat and sources of ignition.
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.
