Laminated products are gaining importance as structural materials and it is becoming increasingly important to join them quickly and effectively. The possibility of using pulsed laser welding to join Steelite, a steel polypropylene steel sandwich structure, has been examined, and in the present paper, the authors describe how various combinations of focal spot diameter, pulse duration and pulse power influence the weld. The most important factors contributing to the final weld dimensions are pulse energy, pulse duration and focal spot size. It is shown that although the polymer core affects the final weld dimensions, the development of the weld is comparable with that in monolithic materials. Furthermore, a smaller focal spot diameter was shown to result in more reliable results, a smaller heat affected zone, and reduced damage to the polypropylene core. The results for single spot welds demonstrate the feasibility of using overlapping spot welds to make butt joints in metal polymer laminates.