The Koch Chemie Gummifix is an interior care product designed to help you dress plastic and rubber surfaces. Just like the trim on the exterior of your vehicle can fade, interior trim needs love too. With only a few swipes of Gummifix you will be left with a non-greasy, silicone-oil-free, dark finish. You can apply it to various interior surfaces including your dashboard, mats, vents, door panels, and other rubber, plastic and vinyl areas.