International Ultra 300 is a premium hard antifouling, providing up to one year of protection for powerboats and performance yachts in heavy fouling conditions.

• Premium hard antifouling for minimal wear
• Protects against all types of fouling in high-fouling areas
• Protection: up to 1 year for typical use
• Coverage: 9 m²/L (≈97 ft²/L); 2.5 L covers ≈22.5 m² (≈242 ft²)
• Colour: Blue (YBB725)
• Size: 2.5 L (2,500 ml)
• Available in a range of improved, truer colours
• Suitable for GRP, steel and wood hulls; ideal for planing and performance boats
• Typical application: follow the manufacturer's data sheet; usually 1–2 coats depending on fouling and local conditions
• For best results, prepare and clean the surface according to product instructions before application

See more in our Hard Antifouling collection.