Vehicle windscreens are sealed with polysulphide sealants not silicone. Silicone will not last. Even poly sulphides do not seal without being placed between two surfaces, the screen and the flange, and put under pressure. Just putting silicone on the outside of a windscreen/flange leak will not work for very long. Which is why to reseal a screen that is leaking around the flange, as the V70/XC70 screens that were badly installed do, the screen has to be removed, the screen and flange need cleaning of old sealant and the whole thing needs to be reinstalled with the correct sealant. Which is why, if you have a screen leak, it is advised to take the car to a main Volvo dealer and strong arm them into getting Volvo to pay for the job.
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2012 XC70 SE Lux Polestar 230 bhp D5 Auto Oyster Grey
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