Woolwax® 'XLV' is a formula that is used heavily in the marine industry. (also known as 'Liquid A') Woolwax® 'XLV' is an extremely effective corrosion inhibitor that is resistant to salt water and salt spray. 'XLV' is formulated as a 'float coating' for rudders, voids, ballast tanks, coffer dams, and other inaccessible spaces.