Ultra 300 is a premium hard antifouling in Dover White, formulated to give 12 months' protection for powerboats and streamlined yachts in heavy fouling conditions.

Suitable for GRP, painted/primed steel and timber when used over recommended primers. Easy to apply by brush, roller or airless spray; typically applied in 2 coats. Allow 24 hours between coats and full cure before launch, subject to temperature and conditions. Prepare surfaces by cleaning, degreasing and removing loose paint.

• Premium hard antifouling for 12 months' protection
• Coverage: 9 m²/L
• Colour: Dover White (YBB728)
• Size: 2.5 L (≈0.55 imp gal)
• Ideal for powerboats and streamlined yachts
• Hard-wearing formula resists rapid wear in high-challenge areas
• Typically applied in 2 coats; brush, roller or airless spray
• Compatible with GRP, prepared timber and painted or primed steel
• Available in a range of improved, truer colours
• See more in our Hard Antifouling collection