Wearlon Super F-4 is the hardest in the line of Wearlon coatings, improving abrasion resistance and prolonging the life of your propeller. It is a water based, environmentally friendly coating that can be painted or sprayed on. Wearlon Super F-4 is a non-stick foul release coating that minimizes maintenance, decreases drag and is non conductive, which eliminates any concern of galvanic corrosion on aluminum.