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Goop on screws |
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GeoB 
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Joined: July-12-2021 Location: Connecticutt Status: Offline Points: 36 |
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 Topic: Goop on screwsPosted: October-09-2021 at 11:04am |
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I pulled my 1985 SN swim deck and Pito tubes.
What is the white grease goo on the screws and lag bolts? Will I need to replace it when I put all this back? |
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Geo
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75 Tique
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Joined: August-12-2004 Location: Seven Lakes, NC Status: Offline Points: 6097 |
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Posted: October-09-2021 at 1:17pm |
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Sealant. Probably 3M 4200. Two common sealants for hull penetrations, 4200 or 5200. The 4200 is sealant only and allows for disassembly. The 5200 is sealant and adhesive and a lot tougher to pull apart. Yes, you will want to reseal all the holes and fittings when you reassemble.
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“So, how was your weekend?” “Well, let me see…sun burn, stiff neck, screwed up back, assorted aches and pains….yup, my weekend was great, thanks for asking.” |
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DrCC
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Joined: April-12-2004 Location: at home Status: Offline Points: 2867 |
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Posted: October-09-2021 at 2:18pm |
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Yes, goop the screws.
Anything and everything below the waterline. Goop the part and goop the fasteners. I prefer the 3M 5200. And avoid substitutes like Boatlife sealants, It will washout, sometimes less than 3 years. 5200 should be good for well over 20 years maybe more. If your old sealant feels greasy, it's probably a cheap substitute. |
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Keep it....from sinkin'
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gun-driver
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Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4112 |
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Posted: October-09-2021 at 2:49pm |
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What Doc states is correct, but I would not use 5200 on anything you may want or need to remove again in the future.
That stuff is just pretty much permanent.
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