Store › Koch Chemie Gummifix Image 1 of 2 Image 2 of 2 Koch Chemie Gummifix $31.99 Restores and protects rubber surfaces.Keeps seals, mats and trim flexible and looking fresh perfect for a clean OEM finish. Quantity: Add To Cart Added! Restores and protects rubber surfaces.Keeps seals, mats and trim flexible and looking fresh perfect for a clean OEM finish.