The present invention relates to molded polyurethaneurea elastomers, and specifically to improved polyurethaneurea elastomers having high temperature stability to about 140\u2013150\xb0 C. The composition may further optional contain a surfactant andor an organic solvent andor a weighting material. An interleaver randomizes the source data provided from one of the convolution units. A second molding is in engagement with the fist molding to cover the ink chambers. Also disclosed are methods of making the compounds and using the compounds for treatment of diseases associated with the P2X7 purinergic receptor.