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Hard Antifouling

Hard antifouling is a hard antifouling paint recommended for owners of motorboats and sailboats moving at speeds up to 70 knots.

ColorCapacityCode
dark blue750 ml 300008284
dark blue2,5 l300008288
red750 ml300008286
red2,5 l300008289
black750 ml300008282
black2,5 l300008287
Hard Antifouling

Technical informations

Color

Exposure of a freshly applied antifouling paint to moist air can lead to color change. The discoloration is only superficial and does not affect the effectiveness of the antifouling paint. Due to the content of copper oxide, a small color difference between the parts of the antifouling paint is acceptable.

Application method

Manually:

  • brush
  • roller

Spray:

  • airless spray

Product description "Hard Antifouling"

  • Suitable for salty and regular water.
  • Suitable for sailing and motor boats traveling with a maximum speed 70 knots.
  • For use on steel, wood and laminate hulls.
  • Do not use aluminum.
  • Easy to apply.
  • Fast drying time.
  • Thinning is not recommended because it reduces the effectiveness of the paint.
  • Paint is composed of copper oxide and resins. It does not contain tin compounds.
  • As a primer coat, use Sea-Line® epoxy primer  – for example:  Sea-Line® Antisorrosiv protection 4:1,  Lightprimer 5:1, Universal primer 1K.

Basic information

Type GRP laminates, wood, Steel
Place Below waterline
Function Antifouling paint discourages the growth
of barnacles, weed, and other water life on the
submersed hull of the boat.
Application brush, roll, spray gun
Thinning *No recommended
Theoretical coverage For 1l± 10 m2 for
90 μmWFT/ 50 μm DFT
Coats number 1 – 3
Maximum recommended layer thickness100 μm DFT
Time between layers Min 6 h
Dry to launch: Min 12 h

Surface preparation

NEW VESSELS WITHOUT PAINT COATINGS OR ANTI-FOULING PROTECTION

If anti-fouling is being applied to a vessel without any paint coatings, it is advisable to first apply systems that create protective layers. This means that different protection will be applied to different surfaces:

  • Gelcoat (polyester laminate) will require an anti-osmosis primer. In this case, Lightprimer or Sea-Line HS epoxy primer can be used.
  • Steel requires anti-corrosion protection. We recommend Sea-Line Anti-Corrosion 4:1 epoxy primer.
  • Wood can be protected against water absorption, for example, by using Lightprimer epoxy primer.

EXISTING ANTI-FOULING COATINGS

If the vessel has old anti-fouling coatings, first check the compatibility between the new paint and the previously applied paint. If the paints are incompatible or the coatings are in poor condition, they should be removed and treated as for new units without antifouling protection. If the paints are compatible and the coatings are in good condition, wet sand the surface with P120-P240 grit sandpaper before applying new coats. After sanding, clean and degrease the surfaces using Sea-Line Cleaner.
If the existing coating is in good condition and the type of antifouling paint previously applied is unknown (excluding paints containing Teflon), wet sanding the surface with P120-P240 grit sandpaper is recommended. Then, use Sea-Line Universal Chlorinated Rubber 1K Primer as a release agent; see the primer’s technical data sheets.

You have questions about the product - Hard Antifouling

    Thinning notice:

    In the case of high temperatures and the need to thin the antifouling paint, a maximum dilution of 0-5% (by volume) is recommended.
    Dilution and the application method directly affect the thickness of the antifouling paint layer.

    Special attention should be paid to obtaining a specific coating thickness (100 μm DTF), which ensures the effective operation of the antifouling paint.

    Also check

    Our FAQ answers to frequently asked questions

    Do you have to paint the scratched side of the boat?

    If the scratches are not deep, then we can renew the scratched side by polishing with Sea-Line polishing pastes. Above the waterline, when the scratches are not deep, the surface can be repaired with a DRY FAST gel coat filler. Deep scratches should be filled with epoxy filler (selected depending on the requirements of the scratched surface), painted with a primer and then painted with topcoat.

    Why despite the use of antifouing paint the bottom of the boat is overgrown?

    Possible causes

    • Too thin layer of antifouling paint,
    • Choosing the wrong antifouling to type of a boat or yacht
    • Thinning of antifouling paint,
    • Incorrect surface preparation before antifouling application.

    How to prevent

    • Apply the right layer thickness of paint indicated by manufacturer,
    • Choose antifouling dedicated to type of boat or yacht and suitable for the type of water,
    • Do not thin antifouling because of the risk of reducing effectiveness,
    • Careful surface preparations (grinding, clearing, degreasing),

    How to remove

    • Wet grinding, apply new layers of antifouling paint.
    • Use C1 shell and fouling remover.

    Can I add some thinner to antifouling paint?

    There is a possibility of thinning antifouling, but we do not recommend this procedure due to the risk of reducing the effectiveness of the paint. If it is necessary to thin the antifouling paint, it is recommended to dilute it to a maximum of 0-5% (by volume).

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