Abstract: A seal device for sealing between a surface such as a roof and an elongate member such as a pipe projecting through that surface. A one-piece mounting plate has a planar base portion with an access aperture therethrough, and is composed of metallic, non-resilient, manually deformable material. The base portion is located in a face-to-face relation with a mounting surface so that an elongate member projects through the access aperture. The base portion is deformable to conform to the contour of the surface and retain the deformed contour. A rim portion, which is integral with the base portion, extends about the periphery of the access aperture and upstands from the body portion, and that rim portion has a retaining lip spaced outwardly of the base portion and shaped to provide an underlying shoulder. A sealing member overlies the access aperture and has an access passage for receiving the elongate member therein with the sealing member sealingly engaging the elongate member.