Sudbury 322 Marine Sealant – 3 oz. Tube, Black
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You have 30 days to request a return. All sale items are final sale.
Sudbury 322 Marine Sealant – 3 oz. Tube, Black
Sudbury 322 is a single-component, fast-skinning marine sealant engineered for demanding above- and below-waterline applications. It skins in as little as 10 minutes and reaches full cure in 1–7 days, delivering a flexible, watertight bond that holds up in harsh marine environments. The black formulation is ideal where a clean, finished appearance matters on dark hulls, fittings, and hardware.
Key Features
- Fast skin time: approximately 10 minutes
- Full cure: 1–7 days depending on temperature and humidity
- Cures in temperatures from –29°C to +49°C (–20°F to +120°F)
- Superior flexibility, elongation, and compression resistance
- Excellent adhesion to fiberglass, wood, metal, glass, Plexiglas, Lexan, and most plastics
- Can be wet-sanded or painted after full cure
- Cleanup with mineral spirits
- Not recommended for wood deck seams
Compatible Applications
- Hull-to-deck joints and through-hull fittings
- Portlights, hatches, and hardware bedding
- Below-waterline sealing on fiberglass and metal hulls
- Keel bolt and rudder fitting seals
- General marine hardware installation requiring a flexible, permanent bond
Parts Desk Insights
This is the go-to tube-size sealant for hardware bedding and through-hull work where a cartridge gun isn't practical. The 3 oz. tube format is ideal for smaller jobs, touch-ups, and tight spaces. For larger sealing projects or continuous runs, consider the Sudbury 302 Sealant – 10 oz. Cartridge, Black. If you need a clear or white finish, see the Sudbury 321x Sealant – 3 oz. Tube, Clear or Sudbury 320 Sealant – 3 oz. Tube, White. For penetrating sealant applications, the Sudbury 350 Marine Penetrating Sealant is a strong companion choice.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.