Dash, Rubber And Plastics. Stp Available here. You take great care of your car’s exterior, but often the interior of the car doesn’t get as much attention. Yet the interior is where you spend most of your time, so don’t let it be forgotten. Dash, rubber and plastics maintenance is an important step in the care of your vehicle. We have dash cleaners to get out grime and add shine, rubber treatment solutions to protect and help maintain the elasticity of your door seals and rubber details, and trim restorer to keep the interior details looking as good as new. Travel in style by maintaining the interior of your car with our dash, rubber and plastics maintenance products.