Last week I went to open the car door and it was frozen! Opened with a nasty crackling sound! I was then kicking myself for being so silly as to have forgotten to give the door and boot seals their twice yearly rubber care treatment. So out with the Gummi-Pflege and a small paint brush and it was the work of 10 minutes to go round everything that needed it. This is the stuff: I bought the genuine BMW product from our site supporter friends @Cotswold BMW a year or so ago. The 250ml bottle will probably last for several years more.