I use a silicon on it but it's already on its way out so when this bloody snow and ice has done one i will replace it, the snow which was fun at 1st, and the car loves it but I don't everywhere I go seen range rovers and all manner of 4x4s stuck or struggling but this panda draws all the attention cos it's a little husky that takes snow in its stride not even been remotely stuck yet spose there's always a 1st time but not yet