Mix and apply a fourth layer of Mold Max™ STROKE with no pigment added, covering the entire model and flange. The rubber mold should be approximately 3/8'' (1 cm) thick. Allow the entire Mold Max™ STROKE mold to fully cure (16 hours). Using a sharp razor knife, cut the excess silicone from the outer edge of the mold, creating straight edges and squaring off all of the corners.