Sudbury Elastomeric 3 oz (89 ml) White Sealant is a one-part, marine-grade elastomeric sealant built for tough applications both above and below the waterline. It skins quickly and cures to a flexible, durable seal, making it ideal for sealing ports, bed hardware, trim tabs, and transducers on boats and other marine installations.
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Size: 3 oz (89 ml) tube
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Color: White
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Formulation: One-part elastomeric sealant with no mixing required
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Cure time: Skins in about 10 minutes; fully cures in 24 hours
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Flexibility: Twists, bends, expands, and compresses to seal ports, bed hardware, and joints
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Adhesion: Excellent adhesion to fiberglass, glass, plastic, metal, and wood without primers
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Substrates: Wide substrate compatibility (fiberglass, glass, plastic, metal, wood)
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Temperature range: Cures from -20°F (-28.9°C) to 120°F (-48.9°C)
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Finish: Paintable and wet-sandable after curing
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Durability: Resistant to teak cleaners, oil, diesel fuel, and saltwater
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Application: Easy one-part formulation; cleanup with mineral spirits
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Use cases: Sealing ports, filling gaps around hardware, and sealing for trim tabs and transducers
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Not recommended: Wooden deck seams or areas subject to gasoline
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Manufacturer: Sudbury
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Part number: 320
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UPC: 898286002173
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Safety: Prop 65 warning: This product can expose you to chemicals including Toluene, which is known to the State of California to cause birth defects or other reproductive harm
Sudbury Elastomeric Sealant delivers a reliable, flexible watertight bond that stays pliable as your rig moves. The one-part formula means easy application—no mixing, a quick skin time, and a 24-hour cure to get you back in service fast. It bonds to fiberglass, glass, plastic, metal, and wood without primers, simplifying installs around ports, hardware, trim tabs, and transducers. After curing, it can be painted and wet-sanded for a seamless finish, helping you match the deck and hull. The sealant withstands harsh marine conditions, resisting teak cleaners, oil, diesel fuel, and saltwater, and tolerates wide temperature swings. Note: Not recommended for wooden deck seams or areas subject to gasoline. Prop 65 warning: This product contains toluene and may cause birth defects or other reproductive harm; see the warning information.
