Woolsey Yacht Shield SF utilizes an enhanced formula with a high cuprous oxide load combined with PTFE for multi-season control in all types of fouling, plus added performance and reduced friction. It employs a unique controlled erosion technology to minimize coating build-up and keep underwater surfaces smooth. Its ablative surface wears away with use providing a continuous supply of fresh biocides while eliminating the need for sanding. Woolsey’s Yacht Shield SF formula allows the vessel to be hauled and re-launched without repainting. Woolsey Yacht Shield SF is an excellent choice for power or sailboats with fiberglass, woodor steel hulls.