Typically no. In fact, we advise against changing the gasket unless absolutely necessary and here’s why. When removing the existing gasket, there is always some risk of breaking an adjoining windshield, encountering sagging of the front roof structure, or having to deal with problems arising from the fit of a new gasket to the original paint lines on your coach. Generally speaking, a gasket should only be replaced if it is found to have deteriorated due to either dry rot, UV damage, or if some type of collision damage has been sustained. If it must be replaced, make sure the job is performed by a professional windshield installer in a controlled shop environment.