Can the pre-wash stain remover also be used on wool and silk?

No, the pre-wash stain remover (as a spray, spray bottle or refill) is not recommended for wool, silk, rubberised materials and special equipment. For these, it is recommended to use pre-wash gall soap (bar or liquid) or a treatment with pre-wash OXI power. The pre-wash hygiene rinse can also be easily used if items of clothing made of wool or silk are washed.