What is Interbond 808 Part A and why choose it?
INTERBOND 808 PART A from International Marine is the base component of a light-coloured, tar-free, two-pack epoxy anticorrosive coating with very high volume solids (82%). When combined with its curing agent (Part B KRA855), it forms a high-performance epoxy system designed to protect demanding marine and industrial environments such as water ballast tanks, cofferdams, void and wet spaces, bilges and crude oil tanks. It can be applied as a one- or two-coat system on properly prepared steel, including grit blasted, hydroblasted or mechanically cleaned surfaces, and is tolerant of damp (but not wet) substrates.
This product is formulated for professional Maintenance & Repair or On Board Maintenance, offering reliable corrosion protection, high film build in a single application and controlled VOC levels for compliance with international regulations.
Main features
- High solids epoxy: 82% ±2% volume solids (ISO 3233:1998) for high film build and reduced solvent emissions.
- Surface-tolerant: Can be applied over grit-blasted, hydroblasted or mechanically cleaned steel, including repair situations.
- Damp surface application: Suitable for application onto damp but drying substrates (not standing water).
- High film thickness in one coat: Typical dry film thickness of 300 microns (366 microns wet).
- Flexible application: Designed for airless spray with the option of brush application for small areas.
- Two-pack epoxy system: Mixed at 4 volumes Part A to 1 volume Part B (curing agent KRA855).
- Certified for grain carriage: When used in an approved scheme, holds Food Contact certification for carriage of grain (NOHH).
- VOC-controlled formulation: 220 g/L as supplied (EPA Method 24) with additional EU and Chinese VOC references.
- Multiple colour options: Buff (KRA850), Grey (KRA852, Singapore only), Aluminium (KRA853), White (KRA854, Brazil and Singapore only) and Black (KRA859, USA only).
- Marine-grade durability: Suitable for ballast tanks, crude oil tanks and other highly corrosive marine service areas.
Technical specifications
General product data
- Product type: Two-pack epoxy anticorrosive coating (Part A base component).
- Colour options (system): KRA850 Buff, KRA852 Grey (Singapore only), KRA853 Aluminium, KRA854 White (Brazil and Singapore only), KRA859 Black (USA only).
- Finish/Sheen: Not applicable.
- Part B (curing agent): KRA855.
- Mix ratio: 4 volumes Part A to 1 volume Part B.
- Induction time: Not required.
- Flash point (typical): Part A 32°C; Part B 58°C; Mixed 33°C.
Solids, thickness and coverage
- Volume solids: 82% ±2% (ISO 3233:1998).
- Typical dry film thickness: 300 microns.
- Typical wet film thickness: 366 microns.
- Theoretical coverage: 2.73 m²/L at 300 microns DFT (loss factors must be considered).
Application methods and equipment
- Recommended methods: Airless spray, brush (for small areas only).
- Airless spray:
- Recommended.
- Tip range: 0.45–0.66 mm (18–26 thou).
- Total fluid pressure at spray tip: not less than 190–246 kg/cm² (2700–3500 psi).
- Brush application: For small areas only; multiple coats may be required to achieve specified film thickness.
- Roller: Not recommended.
- Thinner: International GTA220 (thinning normally not required; do not exceed local environmental limits).
- Cleaner: International GTA822 / GTA220.
Drying and overcoating times (typical)
Substrate temperature dependent, based on standard laboratory conditions:
- 5°C
- Touch dry: 15 h
- Hard dry: 34 h
- Walk-on time: 44 h
- Before flooding: 3 days
- Pot life: 2 h
- Overcoat with Interbond 808: minimum 48 h, maximum 14 days
- 15°C
- Touch dry: 8 h
- Hard dry: 18 h
- Walk-on time: 21 h
- Before flooding: 2 days
- Pot life: 100 min
- Overcoat with Interbond 808: minimum 30 h, maximum 10 days
- 25°C
- Touch dry: 3.5 h
- Hard dry: 7 h
- Walk-on time: 8.5 h
- Before flooding: 24 h
- Pot life: 75 min
- Overcoat with Interbond 808: minimum 12 h, maximum 7 days
- 35°C
- Touch dry: 2 h
- Hard dry: 4 h
- Walk-on time: 5 h
- Before flooding: 12 h
- Pot life: 30 min
- Overcoat with Interbond 808: minimum 8 h, maximum 5 days
VOC information
- VOC (as supplied): 220 g/L (EPA Method 24).
- VOC (EU Solvent Emissions Directive 1999/13/EC): 152 g/kg of liquid paint as supplied.
- VOC (Chinese National Standard GB23985): 150 g/L.
Surface preparation
- General: Paint only clean surfaces. Remove all grease, oil, soluble contaminants and foreign matter by solvent cleaning (SSPC-SP1).
- Major refurbishment:
- Abrasive blast to Sa2 (ISO 8501-1:2007) or hydroblast to International Paint standard HB2M/H.
- Areas blasted with abrasive should be fresh-water washed prior to coating.
- Slurry blasting to International Paint SB2M/H is acceptable for above-water and topside areas.
- Repair / On Board Maintenance (OBM):
- Mechanically clean corrosion to St3 (ISO 8501-1:2007) or hydroblast to HB2M/H.
- Abrade the surrounding intact coating and feather edges.
- Slurry blasting to SB2M/H may be used above water and topside.
- Overcoating existing coatings:
- Large areas of aged two-component coatings should be high-pressure fresh-water washed before application.
- Suitable two-component systems for overcoating must be confirmed with International Paint.
- Interbond 808 must not be used to maintain or overcoat one-component ballast coatings.
- For two-coat schemes, Interbond 808 Aluminium must always be used as the first coat.
- North America marine standards (alternative):
- SSPC-SP6 may be used in place of Sa2.
- SSPC-SP3 or SSPC-SP11 may be used in place of St3.
Environmental and curing limitations
- Product will not cure adequately below 5°C.
- Substrate temperature should not exceed 40°C.
- Can be applied on a damp but drying surface, not on a wet surface, pools or droplets.
- Simple dampness test: draw a "V" with a finger; if water gathers at the bottom, the surface is wet and must not be coated.
- Curing continues after immersion in water; however, early immersion may slow cure and produce soft films (see drying times before flooding).
- For optimum application properties, bring material to 25–30°C before mixing and application.
Unit sizes and storage
- Unit size (typical):
- 20 L unit: Part A 16 L (20 L pack); Part B 4 L (5 L pack).
- 5 US gallon unit: Part A 4 US gal (5 US gal pack); Part B 1 US gal (1 US gal pack).
- 1 US gallon unit: Part A 0.8 US gal (1 US gal pack); Part B 0.2 US gal (1 US quart pack).
- Typical shipping weight per mixed unit:
- 1 US gal unit: 18 lb.
- 20 L unit: 34.7 kg.
- 5 US gal unit: 86.7 lb.
- Shelf life: 12 months 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.
Applications and use cases
- Water ballast tanks: High-build anticorrosive lining for ballast tank structures in newbuilding and maintenance.
- Cofferdams and void spaces: Protection of difficult-to-access spaces exposed to condensation and intermittent moisture.
- Wet spaces and bilges: Corrosion protection where water, oils and contaminants are regularly present.
- Crude oil tanks: Internal lining for crude oil storage tanks within the limits specified by International Paint.
- Maintenance & Repair: Refurbishment of existing two-component tank coatings following appropriate surface preparation.
- On Board Maintenance (OBM): Structured shipboard maintenance, including spot and stripe coats on prepared areas.
FAQ
1. What is INTERBOND 808 PART A used for?
It is the base component of a high-performance epoxy anticorrosive system designed for water ballast tanks, cofferdams, void and wet spaces, bilges and crude oil tanks, mainly in marine Maintenance & Repair or On Board Maintenance.
2. Can it be applied to damp steel?
Yes, Interbond 808 can be applied onto a damp but drying surface. It must not be applied to a wet surface, pools or droplets of water.
3. What surface preparation is required for repair work?
Areas of corrosion should be mechanically cleaned to St3 (ISO 8501-1:2007) or hydroblasted to International Paint HB2M/H, with surrounding intact coating abraded and edges feathered.
4. Which application methods are recommended?
Airless spray is recommended for most areas, with brush application only for small areas where multiple coats may be needed to achieve the specified thickness.
5. What is the mixing ratio between Part A and Part B?
The system must be mixed at 4 volumes of Part A to 1 volume of Part B (curing agent KRA855).
6. What are the minimum and maximum overcoating intervals?
Depending on substrate temperature, overcoating with Interbond 808 ranges from minimum 8–48 hours to maximum 5–14 days.
7. Is Interbond 808 suitable over one-component coatings?
No. Interbond 808 must not be used to maintain or overcoat one-component ballast coatings.
8. Does the product meet any food-contact related approvals?
When used as part of an approved scheme, it carries certification for Food Contact – Carriage of Grain (NOHH), subject to formulation and manufacturing site.
9. What is the typical pot life after mixing?
Pot life ranges from 2 hours at 5°C to 30 minutes at 35°C.
10. What is the VOC level of the coating?
The VOC content is 220 g/L as supplied (EPA Method 24), with additional values defined for EU and Chinese regulations.
Section 14 – Transport information
- UN number: UN1263.
- UN proper shipping name: PAINT.
- Transport hazard class: Class 3 (flammable liquid).
- Packing group: III.
- Environmental hazards: Not classified as environmentally hazardous for transport (ADR/RID, IMDG, IATA).
- ADR/RID additional information: Tunnel code (D/E).
- IMDG additional information: Emergency schedules F-E, S-E.
- Special precautions for user: Within user’s premises, always transport in closed, upright and secure containers and ensure personnel know actions to take in case of accident or spillage.
- Transport in bulk according to IMO instruments: Not applicable.
Section 8 – Individual protection measures
Hazard profile (Part A)
- Classification (Regulation (EC) 1272/2008):
- Flam. Liq. 3 – Flammable liquid and vapor (H226).
- Skin Irrit. 2 – Causes skin irritation (H315).
- Eye Irrit. 2 – Causes serious eye irritation (H319).
- Skin Sens. 1 – May cause an allergic skin reaction (H317).
- STOT RE 2 – May cause damage to organs through prolonged or repeated exposure (H373).
- Aquatic Chronic 3 – Harmful to aquatic life with long lasting effects (H412).
Recommended personal protective equipment
- General hygiene:
- No eating, drinking or smoking in areas where the product is handled or stored.
- Wash hands, forearms and face thoroughly after handling and before breaks.
- Remove contaminated clothing and protective equipment before entering eating areas; wash contaminated clothing before reuse.
- Eye/face protection:
- Chemical splash goggles complying with an approved standard where splashes, mists or vapours may occur.
- Hand protection:
- Chemical-resistant, impervious gloves complying with EN374 or equivalent.
- For prolonged or frequently repeated contact: protection class 6 (>480 minutes breakthrough time); recommended materials: Viton or nitrile, thickness ≥ 0.38 mm.
- For brief contact: protection class ≥ 2 (>30 minutes); recommended: nitrile gloves, thickness ≥ 0.12 mm.
- Replace gloves regularly and immediately if damaged.
- Skin and body protection:
- Wear suitable protective clothing selected according to task and risk assessment.
- Where ignition from static electricity is possible, use antistatic protective clothing (overalls, boots and gloves) complying with EN 1149.
- Select appropriate protective footwear and additional skin protection based on the work being performed.
- Respiratory protection:
- Use a respirator conforming to EN140 with type A/P2 filter or better when ventilation is insufficient.
- Implement a respiratory protection programme to ensure correct fit and use.
- During dry sanding, flame cutting or welding of the dry film, provide local exhaust ventilation or suitable respiratory protection, as these operations generate dust and/or hazardous fumes.
- Engineering controls:
- Use only with adequate ventilation, including local exhaust or process enclosure to keep airborne levels below occupational limits.
- Use explosion-proof ventilation and equipment to keep vapour concentrations below lower explosion limits.
- Ensure eyewash stations and safety showers are close to work areas.
Contenido generado por IA
