A weatherstrip including a strip body provided with base. The base includes a surface to which the weatherstrip is fitted onto a vehicle body and a seal portion formed integrally with the base. An adhesive layer is applied on the fitting surface, for adhering the strip body to the vehicle body. A release liner is provided for protecting the adhesive layer until the weatherstrip is fitted. The release liner contains a synthetic resin non-woven fabric layer and a film layer laminated thereon, and has a high tensile strength.
