The Once a Year Boat Polish! Synthetic Boat Polish with UV Inhibitors for a Brilliant Shine with the Best Protection & Longest Life. There is No Carnauba Wax ingredient so your boat is safe from yellow stains. You can use it on Fiberglass, Aluminum, Stainless steel and Painted Boats.
Premium Boat Shine should only be used above the waterline. It contains some VS721 which adds to its durability but not enough to make it waterproof or seal the pores of the gelcoat to prevent osmosis. It also contains more UV inhibitors than VS721, to resist UV degradation which is more prevalent above the waterline.
Use VS721 below the waterline and Premium Boat Shine above.