portion 10 in order to form the strip portion 22 of the weatherstrip in one embodiment the saddle die is formed in two connected portions the first portion is approximately one inch thick and the second portion is approximately one quarter inch thick these die dimensions will vary based on the formulations and sizes of the profiles formed in this embodiment the saddle die is positioned so that one side 50 and one corner 52 of the cellular piece 54 pass in contact with the first portion of the saddle die the flexible non cellular resin also passes through this first portion of the saddle die but is kept separate from the cellular resin in this die portion both the cellular and non cellular resins are heated in the first die portion the non cellular resin is heated to maintain its flowability as it will be added to the cellular portion the cellular portion is also heated along the side on which the non cellular portion will be attached heating of both the cellular and non cellular is believed to be important in order for the proper adhesion of the non cellular flexible piece to the cellular base in some embodiments and applications both the cellular and non cellular resins then pass into the second portion of the saddle die illustrated in fig8 in this portion the opening 58 next to the cellular resin is shaped so that the non cellular resin flows into the proper configuration.