Sebastian Penetraitt Strengthening and Repair Conditioner 250ml - New. Protect stressed, vulnerable hair against damage with Sebastian Professional Penetraitt Conditioner. This deeply moisturising conditioner is formulated specially for dry, colour-treated hair, leaving it soft to the touch. It helps weak hair regain strength and amazing shine. Sebastian Penetraitt conditioner provides deep conditioning and effortless detangling to stressed, dull hair and is recommended for enhancing the radiance and richness of colour-treated hair.