What is Epoxy GP Coating Part B and why choose it?
Epoxy GP Coating Part B from International Náutica is the curing component of the two-part Epoxy GP Coating system. This hardener is designed for use with Epoxy GP Coating on pre-treated steel, aluminium and dimensionally stable marine plywood. When correctly mixed with Part A, it delivers a matt primer with unlimited overcoating time for compatible two-component products, making it suitable for professional and industrial marine applications.
Main features
- Hardener for Epoxy GP Coating: Part B (IPB112) is specifically formulated to react with Epoxy GP Coating Part A.
- For multiple marine substrates: Suitable on pre-treated steel, aluminium and dimensionally stable marine plywood when used as part of the complete Epoxy GP Coating system.
- Unlimited overcoating window: Once the mixed Epoxy GP Coating has cured, it allows unlimited overcoating with compatible two-component products under controlled conditions.
- Professional-grade performance: Intended for professional and industrial use in interior and exterior environments.
- Controlled drying and pot life: When mixed with Part A, provides a pot life of approximately 8 hours and drying times adapted to a wide temperature range (10–35°C).
- Part of a complete system: Can be overcoated with fillers, primers, undercoats and finishes such as Epoxy Finishing Filler, Interfill, Interprime, Interprotect, Interthane and Perfection Undercoat, according to the technical specification.
Key product information
Product data (mixed Epoxy GP Coating system)
- Type: Two-component epoxy primer for marine use.
- Colour: IPB110 White, IPB164 Grey (Pale Grey, approx. RAL 7035).
- Finish: Matt.
- Density: 1.33.
- Volume solids: 46%.
- VOC: 468 g/l.
- Standard pack sizes: 5 l, 20 l.
- Typical storage time: 2 years.
Mixing and curing
- Mixing ratio (by volume): 100 parts Component A : 15 parts Component B.
- Mixing ratio (by weight): 100 parts Component A : 10 parts Component B.
- Converter/hardener code: IPB112 (Epoxy GP Coating Part B).
- Pot life: Approx. 8 hours (temperature dependent; pot life shortens as temperature and mixed volume increase).
Technical specifications
Drying and overcoating times (mixed system)
- At 10°C (50°F):
- Touch dry: 2 hours.
- Hard dry: 48 hours.
- At 15°C (59°F):
- Touch dry: 1 hour.
- Hard dry: 24 hours.
- At 25°C (77°F):
- Touch dry: 1 hour.
- Hard dry: 12 hours.
The maximum overcoating time without sanding is 6 months in a controlled spray booth. The surface must always be dry, clean and free of dust and grease before overcoating.
Compatible overcoats (examples)
When properly prepared, Epoxy GP Coating can be recoated with, among others:
- Epoxy Finishing Filler
- Epoxy GP Coating
- Interfill 550, Interfill 830, Interfill Deck
- Interior Primer 860
- Interprime 450, Interprime 820
- Interprotect (Professional)
- Interthane 870, Interthane 990
- Perfection Pro Undercoat, Perfection Undercoat
Indicative minimum overcoating time at 25°C is 16 hours for these products (no maximum within the recommended system, indicated as “ext”).
Recommended film thickness and coverage (mixed system)
- Recommended DFT per coat: 60 μm dry by brush/roller, 100 μm dry by spray gun.
- Recommended WFT per coat: 130 μm wet by brush/roller, 217 μm wet by spray gun.
- Theoretical coverage: 7.6 m²/l by brush or roller; 4.5 m²/l by airless spray.
- Practical coverage: 6.9 m²/l by brush or roller; 3.4 m²/l by airless spray (depending on surface profile and application conditions).
- Number of coats: Variable. Consultar ficha técnica del fabricante.
Applications and use cases
Intended substrates
- Pre-treated steel, with or without shop primer.
- Aluminium.
- Dimensionally stable marine plywood.
- GRP (fibreglass) when correctly degreased and prepared.
Typical marine applications
- Yacht and boat hulls and superstructures in steel or aluminium.
- Marine plywood structures where dimensional stability is ensured.
- Interior and exterior areas requiring a two-component epoxy primer compatible with a wide range of fillers, primers, undercoats and polyurethane finishes.
Surface preparation guidelines (summary)
- Steel: Clean to remove rust, oil, grease and dirt. Prepare to near white metal Sa 2½ (ISO 8501-1). Remove blasting or sanding residues with clean, dry air and brushing; vacuum for best results. Where blasting is not possible, prepare to St3 with rotary wire brushing or grinding (grade 24 discs) and remove dust.
- Steel with shop primer: Shop primer must be in good condition, compatible with the selected paint system, and originally applied over Sa 2½ steel. Damaged welds, rusted or burnt areas must be blast cleaned to Sa 2½; intact shop primer should receive a light sweep blast.
- Aluminium (exterior): Clean with Super Cleaner, rinse with fresh water, then blast with fine, dry, non-metallic abrasive. Apply the first coat of Epoxy GP Coating as soon as possible after preparation. Alternatively, carry out a chemical treatment after degreasing, cleaning and sanding with aluminium oxide papers (grade 24–80 or equivalent).
- Aluminium (interior): Clean with Super Cleaner, preferably using high-pressure water. Rinse with fresh water and repeat if necessary until the surface is completely clean and free from grease.
- Marine plywood: Degrease with Degreasing Solvent (Oplosser) or Wipedown Solvent 600. Sand with 150–180 grit and remove all dust. Degrease again with clean cloths. Tropical hardwoods must always be degreased with Oplosser.
- Fibreglass (GRP): Thoroughly degrease with Oplosser or 600 Wipedown Solvent and remove all dust and contaminants to ensure adhesion.
Application methods (mixed system)
- Airless spray: Thin 5–15% with Thinner No. 7 at 23°C. Tip size: 0.48 mm / 19 thou. Pressure: 140–160 bar.
- Conventional spray gun: Thin 5–15% with Thinner No. 7 at 23°C. Nozzle: 2.0–2.2 mm / 80–86 thou. Pressure: 3–4 bar.
- Brush: Thin 0–5% with Thinner No. 7 at 23°C.
- Roller: Thin 0–5% with Thinner No. 7 at 23°C.
If a hull coated with Epoxy GP Coating is left for a long period without further treatment, apply 2 additional coats of at least 80 μm dry film thickness per coat before continuing the system.
Environmental and application conditions
- Ambient temperature: 10–35°C.
- Substrate temperature: 10–35°C and at least 3°C above the dew point to avoid condensation.
- Product temperature: 10–35°C.
- Maximum relative humidity: 80% for proper curing.
- Avoid application under adverse weather conditions.
FAQ – Epoxy GP Coating Part B
-
What is Epoxy GP Coating Part B?
It is the hardener (converter IPB112) used in the two-component Epoxy GP Coating system. When mixed with Part A it activates the curing of the epoxy primer.
-
On which substrates can I use the mixed Epoxy GP Coating?
On pre-treated steel (with or without shop primer), aluminium, dimensionally stable marine plywood and properly prepared GRP, following the specified preparation steps.
-
What is the correct mixing ratio between Part A and Part B?
100 parts Component A : 15 parts Component B by volume, or 100 parts Component A : 10 parts Component B by weight.
-
How long can I work with the mixed product?
The approximate pot life is 8 hours. Pot life shortens as temperature and mixed volume increase.
-
What are the drying times before overcoating?
At 25°C the coating is touch dry in about 1 hour and hard dry in about 12 hours. Overcoating with specified two-component products is generally possible from 16 hours, with no stated maximum under controlled conditions.
-
Do I need to sand before overcoating?
Within a maximum of 6 months (in booth conditions) sanding is not required, provided the surface remains clean, dry and free of dust and grease.
-
Which thinner should I use?
Use Thinner No. 7 for both thinning and equipment cleaning, as specified for each application method.
-
How should I prepare marine plywood before application?
Degrease with Oplosser or Wipedown Solvent 600, sand with 150–180 grit, remove dust and degrease again with clean cloths. Always use Oplosser on tropical woods.
-
Is Epoxy GP Coating Part B suitable for DIY users?
The product and its system are described for professional and industrial use. It must be handled in controlled environments with appropriate protective equipment.
-
How should I dispose of leftover product and containers?
Do not pour paint into waterways or drains. Allow residual paint to harden where possible and dispose of product and containers through authorised waste contractors, in line with local regulations.
Section 14 – Transport information
- UN number: UN1263.
- Proper shipping name (ADR/RID, IMDG, IATA): Paint / Pinturas.
- Transport hazard class: Class 3 (flammable liquid).
- Packing group: III.
- Environmental hazards: Not classified as hazardous to the marine environment according to the provided information.
- Additional ADR information: Tunnel code (D/E).
- Additional IMDG information: Emergency schedules F-E, S-E; segregation group SGG18 – Alkalis.
- Special precautions for users: For on-site transport, always carry the product in closed, upright and secure containers and ensure personnel know what to do in case of accident or spillage.
- Transport in bulk according to IMO instruments: Not applicable.
Section 8 – Individual protection measures
When handling Epoxy GP Coating Part B and the mixed epoxy system, appropriate personal protective equipment (PPE) must be used, especially in professional and industrial environments.
General safety recommendations
- Avoid all contact with skin and eyes.
- Do not inhale vapours or spray mists.
- Do not eat, drink or smoke in application or mixing areas.
- Ensure good general and local exhaust ventilation, particularly in confined spaces.
Recommended PPE
- Hand protection:
- Use chemical-resistant, impermeable gloves complying with EN 374.
- For frequent or prolonged contact, gloves class 6 (breakthrough time > 480 minutes); recommended materials: Viton or nitrile, thickness ≥ 0.38 mm.
- For short contact, gloves class 2 or higher (breakthrough time > 30 minutes); recommended material: nitrile, thickness ≥ 0.12 mm.
- Replace gloves regularly and immediately when damaged.
- Eye and face protection:
- Use chemical splash goggles and/or face shield meeting approved standards.
- If there is a risk of inhalation, a full-face respirator may be required instead of separate goggles.
- Skin and body protection:
- Wear suitable protective clothing, such as coveralls, to prevent skin contact.
- Where there is a risk of ignition due to electrostatic charges, use antistatic protective clothing (coveralls, boots and gloves) according to EN 1149.
- Respiratory protection:
- Based on risk assessment and exposure, select a respirator meeting applicable standards or certifications.
- Respiratory protection must be used within a formal respiratory protection programme to ensure correct selection, fit and training.
- Additional hygiene measures:
- Wash hands, forearms and face thoroughly after handling chemicals and before eating, smoking or using the toilet.
- Remove contaminated clothing and protective equipment before entering eating areas and wash them before reuse.
- Ensure that eye-wash stations and safety showers are available close to the work area.
*Contenido generado por IA
