INTERSLEEK 737 PART A

What is INTERSLEEK 737 PART A and why choose it?

INTERSLEEK 737 PART A is the Part A component of Intersleek 737, a three-pack, silicone elastomer tie coat from International Marine Coatings. The full system is designed to promote adhesion between the specified anticorrosive priming system and Intersleek finish coats, and can also be used as a primer for Intersleek finishes on rubber substrates. It is suitable for both newbuilding projects and maintenance and repair work where a reliable tie coat is required within an Intersleek fouling-control system.

Main features

• Three-component silicone elastomer system designed as a tie coat within Intersleek coating schemes.
• Adhesion promoter between approved primers and Intersleek finish coats, including applications on rubber substrates.
• For newbuild and maintenance use in marine environments.
• Application versatility by airless spray, brush or roller (brush/roller recommended for small areas only).
• Controlled drying and pot life with defined touch-dry, hard-dry and pot life values across a range of substrate temperatures from 0°C to 35°C.
• Defined VOC levels with data given for EPA Method 24, EU Solvent Emissions Directive and Chinese GB standards.
• Available colour for Part A: Pink (code BXA736).

Technical specifications

• Product type: Silicone elastomeric tie coat, three-pack system (INTERSLEEK 737 PART A is the Part A component).
• Intended uses:
  • To promote adhesion between the specified priming system and Intersleek finish coats.
  • As primer for Intersleek finishes on rubber substrates.
  • For use at newbuilding or maintenance and repair.
• Colour (system): BXA736-Pink, BXA737-Light Grey, BXA735-Red.
• Finish/Sheen: Not applicable.
• Volume solids: 57% ±2% (ISO 3233:1998).
• Typical dry film thickness: 100 microns dry (175 microns wet).
• Theoretical coverage: 5.7 m²/litre at 100 microns DFT (allow appropriate loss factors).
• Method of application: Airless spray (recommended), brush, roller. Conventional spray not recommended.
• Mixing ratio (complete system): 4 volumes Part A : 5 volumes Part B : 1 volume Part C.
• Curing agents: Part B BXA738, Part C BXA739.
• Flash point (typical): Part A 36°C; Part B 38°C; Part C 25°C; Mixed 28°C.
• Induction time: Not required.
• Drying information (substrate temperature – touch dry / hard dry / pot life):
  • 0°C: Touch dry 7 h; Hard dry 13 h; Pot life 160 min.
  • 10°C: Touch dry 4 h; Hard dry 8 h; Pot life 120 min.
  • 25°C: Touch dry 2 h; Hard dry 5 h; Pot life 60 min.
  • 35°C: Touch dry 60 min; Hard dry 3 h; Pot life 30 min.
• Typical overcoating intervals with Intersleek finishes (minimum / maximum, depending on substrate temperature):
  • Intersleek 1001: 10°C: 20 h – 5 days; 25°C: 12 h – 5 days; 35°C: 6 h – 5 days. For applications below 10°C, consult International Paint.
  • Intersleek 1100SR: 0°C: 24 h – 5 days; 10°C: 20 h – 5 days; 25°C: 12 h – 5 days; 35°C: 6 h – 5 days.
  • Intersleek 757: 0°C: 24 h – 5 days; 10°C: 20 h – 5 days; 25°C: 12 h – 5 days; 35°C: 6 h – 5 days.
  • Intersleek 970: 0°C: 24 h – 5 days; 10°C: 20 h – 5 days; 25°C: 12 h – 5 days; 35°C: 6 h – 5 days.
• VOC values (typical):
  • 377 g/l as supplied (EPA Method 24).
  • 280 g/kg of liquid paint as supplied (EU Solvent Emissions Directive, Council Directive 1999/13/EC).
  • 373 g/l (Chinese National Standard GB23985).
• Recommended thinner: International GTA007 (only in exceptional circumstances; thinning must not exceed local environmental legislation limits).
• Recommended cleaner: International GTA822 for equipment and work stoppages.
• Application equipment (airless spray): Tip range 0.38–0.53 mm (15–21 thou); minimum total output fluid pressure at spray tip 211 kg/cm² (3000 psi).
• Substrate temperature for application (minimum): 0°C.
• Minimum relative humidity for satisfactory curing: 30% (longer cure times required if RH is below 30%).
• Dew point requirement: Surface temperature must be at least 3°C above the dew point.
• Unit size (typical pack): 10 L unit comprising Part A 4 L (pack 10 L), Part B 5 L (pack 10 L), Part C 1 L (pack 1 L).
• Typical unit shipping weight: 10 L unit – 14.2 kg.
• Shelf life: 12 months minimum at 25°C, subject to re-inspection thereafter.
• Storage conditions: Store in dry, shaded conditions away from sources of heat and ignition. Keep containers closed when not in use.

Applications and use cases

Typical applications

• Marine newbuilding: Tie coat between approved anticorrosive primer schemes and Intersleek antifouling or foul-release finishes on new hulls and underwater areas.
• Maintenance and repair: Reinstatement of adhesion within existing Intersleek systems where breakdown, damage or refurbishment of the coating system is required.
• Rubber substrates: Used as primer to promote adhesion of Intersleek finishes on suitable rubber surfaces.

Surface preparation guidelines

• Use in accordance with standard Worldwide Marine Specifications.
• All surfaces must be clean, dry and free from contamination.
• Perform high-pressure fresh water washing or fresh water washing as appropriate.
• Remove all oil, grease, soluble contaminants and foreign matter according to SSPC-SP1 solvent cleaning.
• Always apply Intersleek 737 over a recommended primer scheme. The primer must be dry and free from contamination and overcoated within the specified intervals.
• Areas of breakdown or damage should be prepared to the specified standard (e.g. Sa2½ to ISO 8501-1:2007) and re-primed before applying Intersleek 737.

Mixing and application

• Material is supplied in three containers forming one unit; always mix a full unit in the supplied proportions.
• Step 1: Agitate Part A with a power agitator.
• Step 2: Combine all of Part A and Part B and mix thoroughly with a power agitator.
• Step 3: Add all of Part C and continue mixing thoroughly with a power agitator.
• Use the mixed unit within the specified pot life for the prevailing temperature.
• Brush and roller application are recommended only for small areas; multiple coats may be required to achieve the specified film thickness.
• Application by conventional spray is not recommended.

FAQ

1. What is INTERSLEEK 737 PART A used for?

   INTERSLEEK 737 PART A is part of a three-component silicone elastomer tie coat system used to promote adhesion between specified primers and Intersleek finish coats, and as a primer for Intersleek finishes on rubber substrates.

2. Can INTERSLEEK 737 be used for both newbuild and maintenance projects?

   Yes. The product is designed for use at newbuilding as well as in maintenance and repair situations.

3. Which application methods are recommended?

   The product can be applied by airless spray, brush or roller. Airless spray is recommended for general application, while brush and roller are recommended only for small areas.

4. What is the minimum substrate temperature and humidity for application?

   The minimum acceptable substrate temperature is 0°C. A minimum relative humidity of 30% is required to ensure satisfactory curing; lower humidity will increase cure times.

5. How thick should the coating be applied?

   The typical dry film thickness is 100 microns (175 microns wet), providing a theoretical coverage of 5.7 m²/litre, subject to appropriate loss factors.

6. What are the overcoating intervals with common Intersleek finishes?

   For Intersleek 1100SR, 757 and 970, typical minimum/maximum intervals range from 24 hours to 5 days at 0°C down to 6 hours to 5 days at 35°C. For Intersleek 1001, minimum intervals range from 20 hours at 10°C to 6 hours at 35°C, with a maximum of 5 days.

7. Can the mixed product be stored for later use?

   No. Once Parts A, B and C are mixed, the material must be used within the specified pot life for the prevailing temperature and should not be resealed for later use.

8. What is the typical shelf life of unopened INTERSLEEK 737 units?

   Unmixed material in unopened containers has a minimum shelf life of 12 months at 25°C, subject to re-inspection thereafter when stored in dry, shaded conditions away from heat and ignition sources.

9. Is conventional spray application allowed?

   No. Application by conventional spray is not recommended for this product.

10. What are the VOC levels of the product?

    Typical VOC values are 377 g/l as supplied (EPA Method 24), 280 g/kg of liquid paint as supplied under the EU Solvent Emissions Directive, and 373 g/l according to Chinese National Standard GB23985.

Section 14 – Transport information

The following information is based on the Safety Data Sheet for INTERSLEEK 737 PINK PART A.

• UN number: UN1263
• UN proper shipping name: PAINT
• Transport hazard class: Class 3 (Flammable liquid)
• Packing group: III
• Regulatory modes:
  • ADG (Australia): UN1263, PAINT, Class 3, Packing Group III
  • IMDG: UN1263, PAINT, Class 3, Packing Group III; Emergency schedules F-E, S-E
  • IATA: UN1263, PAINT, Class 3, Packing Group III
• Environmental hazards: Not classified as environmentally hazardous for transport.
• Special precautions for user: Within the user’s premises, always transport in closed containers that are upright and secure. Ensure that personnel transporting the product know what to do in the event of an accident or spillage.
• Bulk transport: Transport in bulk according to IMO instruments – Not available.

Section 8 – Personal protection measures

The following personal protection guidance is extracted from the Safety Data Sheet for INTERSLEEK 737 PINK PART A and applies particularly during mixing, application, sanding, welding or cutting of coated surfaces.

Engineering controls and hygiene

• Use only with adequate ventilation and, where necessary, local exhaust ventilation or process enclosure to keep airborne contaminants below recommended limits and below any lower explosive limits.
• Use explosion-proof ventilation equipment in areas where vapours may be present.
• Ensure eyewash stations and safety showers are available near the work area.
• Wash hands, forearms and face thoroughly after handling and before eating, drinking or smoking, and at the end of the work period.
• Contaminated work clothing should not be worn outside the workplace and should be washed before reuse.

Individual protective equipment

• Eye/face protection: Safety eyewear complying with an approved standard; where splashes are possible, use safety glasses with side-shields.
• Hand protection: Chemical-resistant, impervious gloves complying with an approved standard. Check with the glove manufacturer for breakthrough times and replace gloves as necessary.
• Body protection: Suitable protective clothing selected according to the task and risks, approved by a specialist. Where there is a risk of ignition from static electricity, use anti-static overalls, boots and gloves.
• Other skin protection: Appropriate footwear and any additional protective garments as required by the specific task and risk assessment.
• Respiratory protection: If ventilation is inadequate or exposure cannot be controlled, wear a suitable respirator selected according to the relevant standard or certification. For operations such as dry sanding, flame cutting or welding that can generate dust or hazardous fumes, use a respirator conforming to EN140 with type A/P2 filter or better, within a respiratory protection program ensuring correct fit and training.

Special safety considerations

• INTERSLEEK 737 PINK PART A is classified as a flammable liquid (Category 3), skin sensitizer (Category 1), carcinogen (Category 1) and toxic to reproduction (Category 2).
• Avoid breathing vapour or mist and avoid skin contact to minimise the risk of sensitisation and chronic health effects.
• During welding or flame cutting on metal coated with this product, dust and fumes may be released; appropriate personal protective equipment and adequate local exhaust ventilation are required.