Ecolife is a nonmetallic preservative plus wood stabilizer system that offers long-term protection against decay and termites and provides weathering protection to reduce cracking, warping, and splitting in above-ground applications. The manufacturer says Ecolife is no more corrosive to fasteners and metal fittings than untreated wood, so it can be used in direct contact with aluminum. The product can be used on a wide range of treatable species, can be painted or stained, and comes with a lifetime limited warranty. 800.421.8661. www.treatedwood.com.