This picture shows what type of Outdrive protection should be put on your Outdrive or Lower unit of your outboard.  Contains no Copper, no Tin, and is Green friendly.  Absolutely nothing grows on the housing shown in the  bottom half of the picture.

The samples used are Tri-Lux by Interlux on top half.  The Bottom half is Smart Solutions by SEA HAWK.  NOTE the difference.  Holtz offers this fine product.

It is perfect for running gear, outdrives, lower units or trim tabs.  Let us install this fine product on your boat this year and save on fuel and maintenance.