I wouldn't count on this product being a "miracle fix" to repair leaks and adhesion problems, especially in critical marine applications. Unfortunately composite resin materials used in the dental setting can debond, leak, & crack. Resin restorative materials provide an acceptable level of longevity; however, they don't last forever and some can & do fail prematurely.
As a rule of thumb, the higher the particulate concentration in composite resins, the harder and more resistant to fracture & wear, the material will be. An unfilled resin material, such as the "5 second fix" is really not that strong. Unfilled resins are typically placed inside a tooth where it penetrates into microscopic tubules within the tooth structure to form a mechanical and chemical bond. The light cured resin liner simply serves as an interface to which the stronger filled composite resins are bonded. Most of these materials are light activated to polymerize/harden. Unfilled resins are just not strong enough to tolerate much stress. Most of the materials used to cement crowns are dual cured; they self cure and UV light exposure accelerates the cure time. If there is insufficient tooth structure to retain a crown or filling and if the preparations are over tapered, these resin materials will not compensate for the deficiencies; the restoration will fail prematurely.
Again, I wouldn't use this product over tried and proven materials in critical marine applications. I would compare it to the cyanoacrylates like "super glue" ; It might be good for home applications, but probably not the best for marine use. If it fails on a critical area on your boat, you lose the boat!
