The present invention is an assembly layer for a flexible device. Within a temperature range of between about -30° C to about 90° C, the assembly layer has a shear storage modulus at a frequency of 1 Hz that does not exceed about 2 MPa, a shear creep compliance (J) of at least about 6x10-6 1/Pa measured at 5 seconds with an applied shear stress between about 50 kPa and about 500 kPa, and a strain recovery of at least about 50% at at least one point of applied shear stress within the range of about 5kPa to about 500 kPa within about 1 minute after removing the applied shear stress.