- A Protect & Shine Spray for a silky-smooth and glossy finish that effectively blocks humidity for up to 72 hrs and tames frizz and provides intense shine. Goldwell StyleSign FlexProTec Complex: product-specific styling polymers and bamboo proteins create any desired look and help to keep the style natural and flexible. A new, unique elastomer and UV filter in all products help protect the hair from premature color fade, damaging effects of heat styling and UV-light. The hair surface is smoothened to enhance natural shine.