BioPad is specially designed with vapor phase corrosion inhibitors impregnated throughout the substrate. BioPad is excellent for protection of ferrous and non-ferrous metals as well as alloys such as: steel, copper, brass, aluminum, zinc, solder, silver, etc. USDA certified biobased product. Constructed from biobased non-woven material. Contains no isocyanates. Provides multimetal corrosion protection. Free of nitrites and chromates.