The rheology of Dow Corning polydimethylsiloxane gum (PDMS/silicone gum) was studied over a time range of 10(-2) to 10(-5) s(-1) and a temperature range of 23-150degreesC using both capillary and dynamic rheometry. A low shear Newtonian region is observed at room temperature below 0.01 rad/s (increasing to 0.1 rad/s at 150degreesC) for which an Arrhenius activation energy for a viscous flow of 13.3 kJ/mol was determined. The Cox-Merz rule for merging of shear and complex viscosities is found to be valid up to 10 s(-1). Viscosity is found to be independent of temperature above 100 s(-1), where terminal power-law flow is encountered. This is exhibited in the dynamic data as equal plateau moduli for the various temperature curves. Gross wall slippage is seen in capillary flows above approximately 100 s(-1), corresponding to a stress value of 70 -100 kPa. Slip-stick (spurt) flow is not observed. The viscosity data are best fitted by the Carreau-Yasuda model with a fitting parameter a of 0.7, a power-law index n of 0.05 (low because of slip effect), and a zero shear viscosity of 32 kPa s at 23degreesC.