Let's get it right to the point: rubber is nothing like plastic and vinyl surfaces. Rather, rubber is a natural product and as a result most plastic care products have no business being applied to rubber parts (for plastic care we recommend you use Swissvax Protection or Swissvax Protection Matt). Rubber tends to become brittle and unsightly over the years if it is neglected, and unfortunately the cost of replacing rubber seals on older vehicles is often very high. As such, regular conditioning of rubber parts tends to pay for itself in the long run, particularly on cherished vehicles that you intend to keep, and there is no finer product for the job than Swissvax Seal Feed.