In our experience, Sudbury Elastomeric Marine Sealant is the best sealant to use in conjunction with Seaview products. The fact that it adheres to Starboard is impressive in itself!
Sudbury Elastomeric Marine Sealant is a one-part, fast skinning (10 minutes) and fast curing (24 hours) multi-purpose marine-grade sealant with superior strength, adhesion, elongation, and life characteristics. Cures in temperatures of -20°F (-28.9°C) to 120°F (48.9°C) and can be wet sanded and painted after curing. Resistant to teak cleaners, oil, diesel fuel, and salt water. Adheres tenaciously without primers to fiberglass, glass, plastics (including Starboard), metal, and wood. Simple clean up with mineral spirits. UV Stable.
Sudbury's SDS is available HERE