INTERLAC 678 VARNISH

What is Interlac 678 Varnish and why choose it?

Interlac 678 Varnish from International Marina is a one-pack alkyd varnish designed to provide a high gloss finish and good durability on interior and exterior woodwork. Formulated for professional, industrial and onboard marine use, it is suitable for newbuilding projects as well as maintenance and repair. Its single-pack nature simplifies mixing and application while delivering reliable protection and an attractive high-gloss appearance.

Main features

• High gloss finish: Designed to deliver a bright, high-sheen varnish surface on wood substrates.
• Durable alkyd technology: One-pack alkyd system engineered for good durability in marine and general environments.
• Interior and exterior woodwork: Suitable for internal and external wooden structures, including onboard applications.
• Professional marine specification: Intended for use in accordance with Worldwide Marine Specifications.
• Versatile application methods: Can be applied by airless spray, conventional spray, brush or roller.
• Easy maintenance: Can be applied directly over aged Interlac 678 that is intact and tightly adherent after proper cleaning and degreasing.
• Single-pack product: No mixing ratio or separate curing agent required; only thorough mechanical stirring before use.
• Defined drying schedule: Touch dry and hard dry times tested in accordance with ISO standards at various temperatures.
• Regulated VOC values: VOC data provided for EPA Method 24, EU Solvent Emissions Directive and Chinese standards.

Technical specifications

• Product type: One-pack alkyd varnish
• Intended substrate: Wood (interior and exterior woodwork)
• Typical uses: Newbuilding, Maintenance & Repair, On Board Maintenance
• Colour: HVA022
• Finish/Sheen: High gloss
• Volume solids: 52% ±2% (ISO 3233:1998)
• Typical dry film thickness: 25 microns (48 microns wet)
• Theoretical coverage: 20.8 m²/litre at 25 microns DFT (allow appropriate loss factors)
• Methods of application: Airless spray, conventional spray, brush, roller
• Flash point (typical): 33°C (single pack)
• Touch dry (ISO 9117/3:2010):
  • -5°C: 16 hours
  • 5°C: 6 hours
  • 25°C: 4 hours
  • 35°C: 4 hours
• Hard dry (ISO 9117-1:2009):
  • -5°C: 60 hours
  • 5°C: 36 hours
  • 25°C: 24 hours
  • 35°C: 24 hours
• Overcoating with Interlac 678 (minimum intervals):
  • -5°C: 48 hours (extended maximum)
  • 5°C: 24 hours (extended maximum)
  • 25°C: 24 hours (extended maximum)
  • 35°C: 24 hours (extended maximum)
• VOC (typical):
  • 373 g/L as supplied (EPA Method 24)
  • 400 g/kg of liquid paint as supplied (EU Solvent Emissions Directive 1999/13/EC)
  • 418 g/L (Chinese National Standard GB23985)
• Unit size: 5 L
• Typical unit shipping weight: 5 L pack: 5.14 kg
• Shelf life: Minimum 24 months at 25°C, subject to reinspection thereafter
• Recommended storage conditions: Store in dry, shaded conditions away from sources of heat and ignition. Keep containers tightly closed.

Applications and use cases

Intended uses

• Interior wood structures
• Exterior woodwork
• Marine wood components in newbuilding projects
• Maintenance and repair of existing varnished wood, including onboard maintenance

Surface preparation

• All surfaces must be clean, dry and free from contamination.
• Perform high pressure fresh water wash or fresh water wash as appropriate.
• Remove all oil, grease, soluble contaminants and foreign matter in accordance with SSPC-SP1 solvent cleaning.

Newbuilding / major refurbishment

• Ensure the wood is clean and dry prior to application.
• For new wood, it is recommended that the first coat is thinned up to 50% with International GTA004 to achieve maximum penetration into the wood.

Repair / On Board Maintenance (OBM)

• Ensure the wood is clean and dry prior to application.
• Interlac 678 may be applied directly over aged Interlac 678 that is intact and tightly adherent, after thorough fresh water washing and degreasing.
• Remove loose or flaking coatings back to a firm edge.
• Use Interlac 678 or an appropriate primer to repair bare or damaged areas before applying the full coat.

Priming bare wood

• The addition of International GTA004 thinner may be required for the first coat on new bare wood, up to a maximum of 50% by volume.

Application guidance

• Mixing: As a one-pack coating, the material must always be thoroughly mixed with a power agitator before application.
• Thinning: International GTA004. Thinning is not normally required. Do not thin more than allowed by local environmental legislation.
• Airless spray: Suitable. Recommended tip range 0.33–0.38 mm (13–15 thou). Total fluid pressure at spray tip not less than 176 kg/cm² (2500 psi).
• Conventional spray: Use suitable proprietary equipment. Thinning may be required.
• Brush: Recommended.
• Roller: Recommended.
• Cleaner: International GTA004 for flushing and cleaning all application equipment.
• Application conditions: Apply in good weather. Temperature of the surface to be coated must be at least 3°C above the dew point.
• Material temperature for optimum application: 21–27°C prior to mixing and application, unless otherwise specified.

FAQ

1. Is Interlac 678 Varnish suitable for both interior and exterior use?

   Yes. It is explicitly designed for interior and exterior woodwork and for use in marine environments, including onboard maintenance.

2. Do I need to mix a curing agent or Part B?

   No. Interlac 678 is a single-pack alkyd varnish. Part B and mix ratio are not applicable; only thorough mechanical stirring is required before application.

3. What thinner should I use with Interlac 678?

   International GTA004 is specified as the thinner and cleaner. Thinning is normally not required, except for specific conditions such as the first coat on new wood or extreme application conditions.

4. How should I prepare aged Interlac 678 before recoating?

   Wash thoroughly with fresh water and degrease. Ensure the existing coating is intact and tightly adherent. Remove any loose or flaking areas, repair with Interlac 678 or an appropriate primer, and then apply the full coat.

5. What is the recommended dry film thickness per coat?

   The typical dry film thickness is 25 microns (48 microns wet) per coat.

6. How long should I wait before overcoating?

   At 25°C, the minimum overcoating interval with Interlac 678 is 24 hours (extended maximum). At -5°C, a minimum of 48 hours is required; at 5°C and 35°C, 24 hours.

7. What is the approximate coverage rate?

   The theoretical coverage is 20.8 m² per litre at 25 microns dry film thickness, before allowing for application losses.

8. How should I clean application equipment?

   Flush all equipment thoroughly with International GTA004 thinner. Filter material before reuse, and keep unused product in tightly closed containers.

9. What are the storage recommendations?

   Store unopened containers in a dry, shaded area away from heat and ignition sources. Shelf life is a minimum of 24 months at 25°C, subject to reinspection thereafter.

10. Is this product classified as hazardous?

    Yes. Under Regulation (EC) 1272/2008 it is classified as a flammable liquid (Flam. Liq. 3, H226) and may cause drowsiness or dizziness (STOT SE 3, H336). Repeated exposure may cause skin dryness or cracking.

Section 14 – Transport information

• UN number / ID: UN1263
• UN proper shipping name: PAINT
• Transport hazard class: Class 3 (flammable liquids)
• Packing group: III
• Environmental hazards: Not classified as environmentally hazardous for ADR/RID, IMDG or IATA in the data provided.
• ADR/RID tunnel restriction code: (D/E)
• IMDG emergency schedules: F-E, S-E
• On-site transport advice: Within user premises, always transport in closed containers that are upright and secure. Ensure that personnel transporting the product know what to do in case of an accident or spillage.

Section 8 – Personal protective measures

Interlac 678 Varnish is a solvent-borne, flammable coating. Appropriate personal protection and ventilation are required during handling, application and drying.

Exposure controls and workplace hygiene

• Use only with adequate ventilation. Employ local exhaust or process enclosures to keep airborne concentrations below recommended limits and below lower explosive limits.
• Wash hands, forearms and face thoroughly after handling, before eating, drinking or smoking, and at the end of the work shift.
• Remove contaminated clothing and protective equipment before entering eating areas, and wash contaminated garments before reuse.

Eye and face protection

• Use safety eyewear complying with an approved standard.
• Where splashes, sprays or mists may occur, wear safety glasses with side shields.

Hand protection

• Wear chemical-resistant, impervious gloves complying with an approved standard whenever a risk assessment indicates potential skin contact.
• For prolonged or frequently repeated contact, gloves with protection class 6 (breakthrough time > 480 minutes according to EN374) are recommended. Recommended materials: Viton or nitrile, thickness ≥ 0.38 mm.
• For brief contact, gloves with protection class ≥ 2 (breakthrough time > 30 minutes according to EN374) are recommended. Recommended material: nitrile, thickness ≥ 0.12 mm.
• Replace gloves regularly and if any sign of damage or degradation is observed.

Body and skin protection

• Select protective clothing based on the specific task and associated risks.
• When there is a risk of ignition from static electricity, use anti-static protective clothing, including overalls, boots and gloves that comply with EN 1149 requirements.
• Use appropriate footwear and any additional skin protection as defined by a risk assessment.

Respiratory protection

• Select a respirator that meets the appropriate standard or certification, based on the hazard and potential for exposure.
• Respirators must be used under a suitable respiratory protection program to ensure correct fitting and training.
• Dry sanding, flame cutting or welding of the dry paint film can produce hazardous dust and fumes. Wet sanding/flatting is preferable where possible.
• If exposure cannot be controlled by local exhaust ventilation, wear a respirator conforming to EN140 with type A/P2 filter or better.

Additional safety considerations

• Classified as a flammable liquid (Flam. Liq. 3, H226); keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
• May cause drowsiness or dizziness (STOT SE 3, H336); avoid breathing vapor.
• Repeated exposure may cause skin dryness or cracking (EUH066); avoid prolonged skin contact.