Antifouling International Interspeed Extra

International Interspeed Extra has been the best-selling antifouling in our range for many years. This hard antifouling protects your boat’s hull below the waterline for an entire season against fouling and algae. It is suitable for use in fresh, brackish, and salt water, and can be applied to both sailing and motorboats.

Interspeed Extra can be used on almost all substrates, including polyester, epoxy, steel, and aluminum. Another major advantage: the antifouling can be applied up to 6 months before launching, giving you great flexibility in your planning. It is available in four vibrant colours, allowing you to not only protect your boat effectively, but also give it a sleek and attractive look. Do you have questions about how to use or apply Interspeed Extra? Our product specialists are happy to provide you with expert advice!

Benefits of International Interspeed Extra

• Easy to apply (1-component).
• Very good hard antifouling to prevent fouling.
• Suitable for polishing (very fine sanding) to achieve a smooth final finish.
• Suitable for all surfaces, including aluminum.
• Can be applied up to 6 months before launching.

Suitable substrates

International Interspeed Extra is suitable for use on the following materials:

• Aluminium / zinc-galvanised steel
• Bronze / stainless steel
• GRP (gelcoat)
• Lead
• Steel
• Wood

How to apply Interspeed Extra

When applying this antifouling over an unknown antifouling, we recommend first using International Primocon to neutralise the layer. If the old layer is in a bad condition, we advise to remove it with a vacuum scraper. Once the primer has fully cured, you can apply the antifouling without sanding for up to one month after application. After one month, the primer must be sanded with grit P80–P180 before applying the antifouling.

This antifouling consists of 1 component and can therefore easily be applied without having to mix it.  Check the technical documentation for any pre-treatment of the substrate. Apply the Interspeed antifouling simply with a (furry)roller or brush. One coat per season is sufficient, but in areas with high turbulence—such as the bow, waterline, keel, and rudder—it is advisable to apply an extra coat for optimal protection.

Please watch the video below about International's best-selling antifouling.

Specifications

Packaging: 0.75L, 2.5L, 20L
Colour: navy, red, white^*, black
Type antifouling: hard
Coverage: approx. 10 m²/ltr per layer
Application method: brush or roller
VOC content: 445 g/ltr
Thinning: not recommended
Minimum application temperature: 5℃
Tack-free after: 30 minutes (23°C)
Recoatable after: after approx. 10-15 hours
Water immersion after: 8 hours (at 23°C)
Shelf life: 2 years
Approval number: 14533 N

^*The colour white is not available in 20-litre containers.

Everything for your boat!

Primers, antifouling, boat paints, gelcoat, topcoat and all other products for boat maintenance are available at Polyestershoppen.com! All our products are available from stock. If you place your order before 5:00 pm CET (Central European Time), your order will be dispatched the same day.

Do you have a question about osmosis treatment, repairs or antifouling? Take a look at our information centre. Would you rather contact one of our specialists? We are ready to assist you via email, telephone, WhatsApp or live chat!