| http://www.w3.org/ns/prov#value | - Many coatings have been suggested in the art, with U.S. Pat. No. 5,420,174 to Dewprashad providing the following non-exhaustive list of natural and synthetic coatings: ???natural rubber, elastomers such as butyl rubber, and polyurethane rubber, various starches, petroleum pitch, tar, and asphalt, organic semisolid silicon polymers such as dimethyl and methylphenyl silicones, polyhydrocarbons such
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