What is Interfine 691 Part A Indivisible Kit and why choose it?
Interfine 691 Part A is the base component of a two-pack, epoxy acrylic, isocyanate-free cosmetic finish from International Marine. When mixed with its dedicated curing agent (Part B – GFA691), it provides a high-gloss, durable topcoat designed for above-water areas. It offers performance equivalent to typical recoatable polyurethane cosmetic finishes, with the advantage of being isocyanate-free, making it suitable where isocyanate-containing products are restricted.
This coating is formulated for professional use in marine environments, both at newbuilding and during maintenance and repair, delivering long-term aesthetic and protective performance on correctly primed substrates.
Main features
- Two-pack epoxy acrylic system: Part A base to be mixed with Part B (curing agent GFA691) before application.
- Isocyanate-free finish: Designed as an alternative to conventional polyurethane cosmetic finishes.
- High gloss appearance: Gloss finish for an attractive, uniform cosmetic topcoat.
- Good long-term durability: Intended to provide a long-lasting cosmetic finish in demanding marine conditions.
- Above-water use: For areas above the waterline; not recommended for immersed service.
- Versatile application methods: Suitable for airless spray, conventional spray, brush or roller.
- Compatible colour range: Available in white (code GFB000), black (code GFY999) and a range of colours.
- Recoatable: Can be overcoated with Interfine 691 within extended overcoating intervals, depending on temperature.
- Designed for professional use: To be applied by trained operators following appropriate safety and application procedures.
Technical specifications
- Product type: Two-pack epoxy acrylic cosmetic finish (Part A base component).
- Finish/Sheen: Gloss.
- Intended areas: Above water areas on marine structures and vessels.
- Use: Newbuilding, Maintenance & Repair, On Board Maintenance.
- Colour options: GFB000 White, GFY999 Black and a range of colours.
- Volume solids: 53% ± 3% (ISO 3233:1998).
- Typical dry film thickness (DFT): 50 microns (equivalent to 94 microns wet film thickness).
- Theoretical coverage: 10.60 m²/litre at 50 microns DFT (allow appropriate loss factors in practice).
- Mix ratio: 2 parts by volume Part A to 1 part by volume Part B (GFA691).
- Induction time: Not required.
- Application methods: Airless spray, conventional spray, brush, roller.
- Recommended airless spray tip size: 0.33–0.45 mm (13–18 thou).
- Minimum fluid pressure at spray tip: Not less than 155 kg/cm² (2200 psi).
- Thinner: Thinning not recommended. International GTA007 may be used only in exceptional circumstances (max. 5% by volume), in accordance with local environmental legislation.
- Cleaner: International GTA007.
- Pot life (mixed unit): Approx. 8 h at -5°C, 8 h at 5°C, 7 h at 25°C, 6 h at 35°C.
- Drying times at 50 microns DFT:
- -5°C: Touch dry 6 h; hard dry 26 h; minimum overcoat 26 h (extended maximum).
- 5°C: Touch dry 4 h; hard dry 22 h; minimum overcoat 22 h (extended maximum).
- 25°C: Touch dry 2 h; hard dry 8 h; minimum overcoat 8 h (extended maximum).
- 35°C: Touch dry 60 min; hard dry 6 h; minimum overcoat 6 h (extended maximum).
- Flash point (typical): Part A 29°C; Part B 28°C; mixed 29°C.
- VOC (as supplied): 409 g/l (EPA Method 24); 285 g/kg of liquid paint (EU Solvent Emissions Directive 1999/13/EC).
- Unit size (kit): 15 litres total (Part A 10 litres pack, Part B 5 litres pack).
- Typical unit shipping weight (complete 15 L kit): 21.03 kg.
- Storage conditions: Minimum shelf life 12 months at 25°C. Store in dry, shaded conditions, away from sources of heat and ignition. Do not store above 35°C.
Systems and substrate compatibility
Interfine 691 (Part A mixed with Part B) must be applied over suitable epoxy anticorrosive primers or tie coats. Selection of the primer system will depend on the vessel area and application location.
Recommended primers/tie coats
- Intergard 263
- Intergard 269
- Intergard 400
- Intershield 300
- Intershield 803
Primers requiring a tie coat before Interfine 691
- Interbond 201
- Interbond 501
- Intertuf 262
Interfine 691 may be applied directly over intact, tightly adherent aged Interfine 691 after thorough fresh water washing and degreasing. Loose or flaking coatings must be removed and repairs carried out with Interfine 691 or an appropriate primer before applying a full coat.
Surface preparation
- Use in accordance with standard Worldwide Marine Specifications.
- All surfaces must be clean, dry and free from oil, grease, soluble salts and other contaminants.
- Carry out high-pressure fresh water washing or fresh water washing as appropriate.
- Remove oil and grease and other soluble contamination in accordance with SSPC-SP1 solvent cleaning.
- For newbuilding or major refurbishment, apply Interfine 691 over a recommended primer scheme. The primer must be within its specified overcoating interval and free from contamination.
- Areas of breakdown or damage should be prepared to the specified standard (e.g. Sa2½, ISO 8501-1:2007) and re-primed before application.
Applications and use cases
When combined with Part B, Interfine 691 Part A Indivisible Kit is suitable for:
- Marine topsides and superstructures: Cosmetic finishing of above-water hull areas and superstructure surfaces.
- Newbuild projects: Final cosmetic finish over approved epoxy anticorrosive systems.
- Maintenance and repair: Refurbishment of existing Interfine 691 systems or compatible primed surfaces during docking or on-board maintenance.
- On-board touch-up: Local repairs where a durable, high-gloss, isocyanate-free topcoat is required above the waterline.
This product is not recommended for immersed service conditions.
Limitations and application considerations
- Not recommended for use in immersed conditions.
- For brush and roller application, and in some colours, two coats may be necessary to achieve uniform coverage, especially over dark undercoats and with certain bright, lead-free colours (e.g. yellows and oranges).
- High relative humidity, fog or condensation during or just after application may lead to a matt finish and inferior film properties.
- Premature exposure to ponding water (e.g. on external decks) can cause colour change, particularly in dark shades and at low temperatures.
- Apply only in good weather conditions. Substrate temperature must be at least 3°C above dew point.
- For optimum application properties, bring the material to approximately 21–27°C before mixing and application, unless otherwise specified.
- Unmixed material (closed containers) should be stored as specified in the storage section.
FAQ – Interfine 691 Part A Indivisible Kit
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1. What type of product is Interfine 691 Part A?
It is the base component of a two-pack, epoxy acrylic, isocyanate-free cosmetic finish designed for marine above-water areas.
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2. Where can this coating be used?
It is intended for above-water areas on marine structures and vessels, for newbuilding, maintenance and repair, or on-board maintenance.
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3. Does Interfine 691 contain isocyanates?
No. It is described as an isocyanate-free cosmetic finish.
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4. What finish does it provide?
When correctly applied with Part B, it provides a high-gloss cosmetic finish.
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5. What is the mixing ratio between Part A and Part B?
The mix ratio is 2 parts by volume of Part A to 1 part by volume of Part B (curing agent GFA691).
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6. How is Interfine 691 applied?
It can be applied by airless spray, conventional spray, brush or roller, over suitable epoxy anticorrosive primers or tie coats.
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7. Can Interfine 691 be used under water?
No. The product is not recommended for immersed conditions.
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8. What is the typical dry film thickness and coverage?
The typical DFT is 50 microns, giving a theoretical coverage of 10.60 m²/litre at this thickness (before loss factors).
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9. How long can a mixed kit be used (pot life)?
Pot life is approximately 8 hours at -5°C, 8 hours at 5°C, 7 hours at 25°C and 6 hours at 35°C.
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10. How should the product be stored?
Store in dry, shaded conditions, away from heat and ignition sources, with a minimum shelf life of 12 months at 25°C. Do not store above 35°C.
Section 14 – Transport information
- Unit size (kit): 15 litres total (Part A 10 L pack, Part B 5 L pack).
- Typical unit shipping weight (complete kit): 21.03 kg.
- Storage during transport: Keep containers in dry, shaded conditions and away from sources of heat and ignition. Do not expose to temperatures above 35°C.
- Additional regulatory transport data (ADR/IMDG/IATA, etc.): Consultar ficha técnica del fabricante.
Section 8 – Exposure controls and personal protection
- Provide adequate ventilation during application and drying to keep solvent vapour concentrations within safe limits and to prevent toxic or oxygen-deficient atmospheres.
- Use appropriate personal protective equipment during mixing, application and surface preparation operations.
- Take precautions to avoid skin and eye contact, for example by using suitable gloves, goggles, face masks and barrier creams as appropriate.
- When welding or flame cutting on metal coated with this product, dust and fumes will be emitted; use appropriate personal protective equipment and adequate local exhaust ventilation.
- All work must be carried out in compliance with relevant national Health, Safety and Environmental standards and regulations.
- For detailed and product-specific PPE recommendations: Consultar ficha técnica del fabricante.
*Contenido generado por IA
