What do you all use to lubricate the rubber and/or vinyl seals on your car, such as around the windows and the sunroof, so they don't dry and crack? I heard that silicone-based products are better than petroleum-based because the silicone won't cause the rubber to dry rot. Same thing with tires, silicone is suppose to be better to use on tires. What do you all use? Product names? Thanks.