Biltema’s zinc anodes contain more than 99.5% pure zinc. For best results when installing zinc anodes, the new anode should always be roughened up with a nylon brush and the attachments checked with an Ohmmeter. The must be no electrical resistance between the anode’s attachment and the part to be protected (e.g. engine or propeller).
Biltema’s zinc is manufactured in compliance with U.S. MIL. 18001 H, standard for zinc anodes.