In various representative aspects, the present invention relates generally to a system and apparatus for sealing a structural attachment to a flat or shingle roof. More specifically, the invention relates to providing the system for sealing structural attachments for solar panel mounts for rail guides. The invention utilizes an adhesive sealant to create a permanent watertight seal at any surface penetration. The system may be used for any structural attachment, fastener, mount, or other penetration that requires sealing. Typical building applications include roof penetrations and wall penetrations for cases such as roof vents, structural attachment, conduit or pipe penetrations, or electrical mounts to name a few.