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Hull to deck sealant. |
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j_ohnno 
Lieutenant 
Joined: 10 May 2024 Location: Australia Status: Offline Points: 24 |
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 Topic: Hull to deck sealant.Posted: 01 October 2025 at 07:18 |
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Hello all. Another 2020/315 question for the knowledgeable people here. The external bead of sealant in the hull/deck join is shrinking and hardening. I wonder if anyone knows exactly what brand and type of sealant is used there so I can replace like with like Thank you.
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Wayne's World
Admiral 
Joined: 18 July 2012 Location: Cruising Status: Offline Points: 1434 |
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Posted: 01 October 2025 at 09:05 |
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Johnno,
Originally is likely to be Sikaflex 295UV. It needs replacing every 3-5 years depending on your sailing area.
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Wayne W
Cruising, currently in the Pacific until the end of 2026. |
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Mark_J1
Rear Admiral 
Joined: 12 March 2013 Location: Dover&Medway UK Status: Offline Points: 690 |
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Posted: 02 October 2025 at 14:08 |
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Don’t know where you are in the world however builders merchants in the UK supply a sealant/adhesive called CT1. That’s a far better option than the original Sika. Lasts longer & easier to apply. Even sets in wet salt water conditions.
Mark
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Hanse 400e "Grey Goose" Hull #31
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