MFM Building Products protects deck ledgers, joists, top edges, and in-ground posts from rot and fungus with DeckWrap, a waterproofing membrane that self-seals around fasteners. The membrane's asphalt adhesive bonds to treated, untreated, and synthetic wood and stops corrosion in metal components that are used with ACQ-treated lumber. Available in pre-packaged rolls of 25 feet, the membrane comes in 3-, 6-, and 12-inch widths. 800.882.7663.