Conathane EN-11 and EN-12 are two-component, highly flexible liquid polyurethane molding and encapsulating systems that ensure the performance of electrical/electronic assemblies exposed to severe environmental extremes. Elastomers prepared from these systems exhibit the outstanding properties. These systems have also shown exceptional adhesion to a wide variety of substrates. - The systems are recommended for cable and connector potting and molding - both military and commercial, electronic module potting, wire wound device encapsulation and strain sensitive component potting. Their excellent moisture resistance also suggests their use as 100% solids thick-film coatings for printed circuitry or, because of their solubility in most commercially available solvents, as flexible thin-film coatings.