Semi-hard matrix anti-fouling coating (for merchant ships and professional boats)
N51B45 Sherwin-Williams

COPPER BOTTOM ANTI-FOULING PAINT #45 is a semihard, anti-fouling developed for the shallow draft trade. It offers a moderately high concentration loading of cuprous oxide and a chemically modified binder that only slightly dissolves upon immersion service.
Recommended Usage

Used for moderate tropical fouling conditions where a moderately high concentration loading of cuprous oxide is required. Used as an anti-fouling coating over prepared surfaces such as steel, wood, aluminum, fiberglass, and previously painted surfaces coated with anti-fouling paint. Use on vessels with a service speed of less than 10 knots.