What is SEAJET 037 COASTAL and why choose it?
SEAJET 037 COASTAL is a hard antifouling paint for leisure and high-speed craft operating in both fresh and salt water. It is designed for good performance in coastal and inland waters, is suitable for drying moorings and for vessels with speeds up to 70 knots. The coating can be applied to suitably primed GRP (fibreglass), wood and steel hulls and other underwater areas, but must not be used on aluminium. As a one-pack system with a wide application temperature window, it is practical for professional yards and experienced boat owners.
Main features
- Hard matrix antifouling: suitable for high-speed craft up to 70 knots and for frequent scrubbing or trailering.
- For fresh and salt water: formulated for coastal, inland and marina environments.
- Substrate versatility: can be used over correctly primed GRP, wood and steel.
- Compatible primers: designed for use over SEAJET 015 Underwater Primer or SEAJET 117 Multipurpose Epoxy Primer.
- Application methods: brush and roller for general use; spray for professional applicators only.
- Extended immersion window: maximum time to launch after application is 6 months (re-float).
- Colour options: red, blue and black (colour differences between batches are possible).
- Robust film: recommended extra coat on leading edges, waterline, rudders and stern gear for added protection.
Technical specifications
- Product type: hard antifouling with special synthetic resin.
- Use: PT21 antifouling paint for leisure sailboats and motorboats.
- System: one-pack product.
- Substrates: suitably primed GRP, wood and steel; not suitable for aluminium.
- Colours: red, blue, black.
- Recommended primers: SEAJET 015 Underwater Primer, SEAJET 117 Multipurpose Epoxy Primer.
- Volume solids: 54 ± 2 %.
- VOC (theoretical): 455 g/l.
- Flash point: 39°C (24°C is also reported; Consultar ficha técnica del fabricante.).
- Recommended film thickness per coat: 100 µm wet / 54 µm dry.
- Theoretical spreading rate: Consultar ficha técnica del fabricante.
- Thinner / cleaner: SEAJET THINNER A (0–5 % by volume, depending on application method).
- Application methods: brush, roller; spray for professional applicators using airless equipment (e.g. Graco 619 or 721 tips, 11.7–14.7 MPa).
- Application conditions:
- Ambient temperature: min. 5°C – max. 35°C.
- Product temperature: min. 5°C – max. 35°C.
- Substrate temperature: min. 7°C – max. 35°C.
- Relative humidity: max. 85%.
- Pack sizes: 0.75 L, 2.5 L, 5 L, 20 L.
- Maximum time to launch after painting: 6 months.
- Shelf life: minimum 2 years at 20°C in unopened containers.
Drying and overcoating data (per coat, 54 µm dry)
Approximate values under standard ventilation:
- 5°C:
- Surface dry: 45 minutes
- Hard dry: 6 hours
- Minimum overcoating interval: 15 hours (no maximum)
- Minimum time before launching: 16 hours
- 10°C:
- Surface dry: 30 minutes
- Hard dry: 4.5 hours
- Minimum overcoating interval: 9 hours (no maximum)
- Minimum time before launching: 10 hours
- 20°C:
- Surface dry: 20 minutes
- Hard dry: 3 hours
- Minimum overcoating interval: 5 hours (no maximum)
- Minimum time before launching: 6 hours
- 30°C:
- Surface dry: 15 minutes
- Hard dry: 2 hours
- Minimum overcoating interval: 4 hours (no maximum)
- Minimum time before launching: 5 hours
Drying and overcoating intervals increase when higher film thicknesses are applied. Before recoating, ensure the existing film is through-dry.
Applications and use cases
- Leisure sailboats and motorboats: antifouling protection for hulls in marinas, drying moorings and coastal cruising.
- High-speed craft: suitable for boats operating up to 70 knots.
- Inland waterways: good performance in rivers, lakes and canals.
- Trailable boats and hard standing: hard matrix film is suitable for regular hauling, pressure washing and storage ashore.
Surface preparation
Existing antifouling
- Wash thoroughly with fresh water at high pressure (approx. 200 bar) to remove fouling and salts.
- Remove any loose or poorly adhering antifouling.
- If the existing antifouling is in good condition, check compatibility in the SEAJET antifouling compatibility table; if compatible, apply SEAJET 037 COASTAL directly.
- If the old antifouling is not compatible or unknown, apply a barrier coat of SEAJET 015.
- Antifoulings should only be wet sanded or chemically stripped. Do not burn off or dry sand old antifouling.
New application on bare substrates
- GRP / FRP / Steel:
- Sand with P100 abrasive paper.
- Remove all dust.
- Apply SEAJET 117 Multipurpose Epoxy Primer (or SEAJET 015 / SEAJET 117 as specified in the technical sheet).
- When applied directly over SEAJET 117, apply SEAJET 037 COASTAL within 48 hours.
- Wood:
- Sand with P100 abrasive paper.
- Remove dust.
- Apply SEAJET 015 Underwater Primer.
- Aluminium: do not use SEAJET 037 COASTAL on aluminium surfaces.
Application guidance
- Stir thoroughly before use until the paint is of uniform consistency.
- Apply two full coats; apply an additional coat to leading edges, waterline, rudders and stern gear.
- Film thickness and coverage depend on method: brush application may require extra coats to reach the specified dry film thickness; stated values are based on roller application.
- Use only in well ventilated areas and keep away from sparks, flames and hot surfaces.
- After immersion, a slight colour change may occur. Colour differences between batches are possible; mix different batch numbers together before application when colour uniformity is important.
FAQ – SEAJET 037 COASTAL
- On which hull materials can I use SEAJET 037 COASTAL?
It can be applied to suitably primed GRP, wood and steel. It must not be used on aluminium.
- Is it suitable for high-speed boats?
Yes. The coating is suitable for high-speed craft with speeds up to 70 knots.
- Can I use it in fresh water?
Yes. The product is designed for both fresh and salt water, including coastal and inland waters.
- How many coats do I need?
Normally two coats are recommended, plus an extra coat on leading edges, the waterline, rudders and stern gear.
- How long can the boat stay ashore after painting before launching?
The maximum immersion (re-float) time after application is 6 months, provided the coating is not contaminated or damaged.
- How should I prepare old antifouling before applying SEAJET 037 COASTAL?
High-pressure wash with fresh water (about 200 bar), remove any loose areas, wet sand or chemically strip if necessary, and if compatibility is uncertain apply a coat of SEAJET 015 as a barrier.
- Can I apply it by spray?
Yes, but spray application is for professional applicators only, using suitable airless equipment and SEAJET THINNER A.
- What is the drying time before overcoating at 20°C?
At 20°C the coating is surface dry in about 20 minutes, hard dry in about 3 hours and can be overcoated after a minimum of 5 hours.
- Does the colour change in the water?
A slight colour change may occur after immersion. There can also be colour differences between production batches.
- How should I dispose of leftover paint and containers?
Do not discharge into drains or watercourses. Dispose of paint and containers at a hazardous or special waste collection point in accordance with local regulations.
Section 14 – Transport information
- UN number / ID: UN 1263.
- Proper shipping name: PAINT.
- Transport hazard class: Class 3 (flammable liquid).
- Packing group: III.
- Environmental hazards:
- ADR/RID/ADN: Dangerous for the aquatic environment.
- IMDG: Marine pollutant (contains Cuprous(I)Oxide and Zinc Oxide).
- Hazard identification number (ADR): 30.
- Emergency schedule (IMDG EmS): F-E, S-E.
- Transport within user’s premises: always transport in closed, upright and secure containers and ensure personnel know what to do in case of accident or spillage.
Section 8 – Personal protective measures
Personal protection advice is based on the Safety Data Sheet for SEAJET 037 COASTAL.
Engineering controls
- Provide adequate ventilation through local exhaust and general extraction so that solvent vapour and particulates remain below occupational exposure limits.
- In spray booths, where ventilation may not be sufficient, operators inside should use a compressed air-fed respirator during spraying and until vapour and overspray levels are below exposure limits.
Respiratory protection
- If exposure may exceed limits, use a half-mask respirator complying with EN 140 fitted with a combined particulate and vapour filter to EN 14387, with an assigned protection factor of at least 10 (e.g. A2P3).
- During dry sanding, flame cutting or welding on the coated surface, wet sand where possible; if not, use suitable respiratory protection.
Hand protection
- Use chemical-resistant gloves tested to EN 374.
- Nitrile gloves provide good protection during spray application.
- Viton gloves are recommended for intense solvent contact (e.g. immersion in solvent).
- Polyethylene (PE) gloves can be used as under-gloves in situations with high or uncertain exposure.
- Follow glove manufacturer instructions on use, storage and replacement; replace gloves at first signs of damage.
Eye and face protection
- Wear safety eyewear to EN 166 designed to protect against liquid splashes.
Skin and body protection
- Wear suitable protective clothing, preferably anti-static garments made of natural fibre or high temperature resistant synthetic fibre.
General safety and hygiene
- Observe all warnings and instructions on the container.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Avoid skin and eye contact and avoid inhalation of vapour, spray mist and sanding dust.
- Children should be kept away until treated surfaces are fully dry.
- Do not allow the product, overspray or waste to enter drains or watercourses. Collect spillages for reuse or disposal.
*Contenido generado por IA
