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sealing new planks on lapstrake

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61seaskiff42
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sealing new planks on lapstrake

Post by 61seaskiff42 » Tue Mar 11, 2014 9:43 am

Hi everyone. I was wondering should I use 5200 to seal between the lapstrake planks or some thing else I have about ten planks to do . I never replaced lapstrake planks before and don't want any leaking or plank cracking (isthis even a problem on these boats). I will be starting this work soon and want to be on the right page!!!!!Is there anything else you guys think I should know about lapstrake boats.I was just thinking solid wood or plywood for planks as i heard they are made of plywood ???????Thanks guys your advice is always truly appreciated . [quote][/quote]

Jim Bell
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Re: sealing new planks on lapstrake

Post by Jim Bell » Tue Mar 11, 2014 12:42 pm

I too will be replacing a couple of plank sections on my Sea Skiff soon. I believe 5200 is the proper sealer to use here. It is a sealer/adhesive that maintains it flexibility. Plywood is the plank of choice. I found out there is no 3/8 available in Canada so I have gone to 9mm MERANTI AQUATEC 7 ply (4' X 8' sheet).

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Re: sealing new planks on lapstrake

Post by jfrprops » Tue Mar 11, 2014 4:24 pm

yes, with ply planks I would use 5200.

John in Va.
1980 Fairchild Scout 30
19?? custom Argentine Runabout 16'
1954 Whirlwind deluxe dual ckpt 16'
1921 Old Town Charles River 17' (founding Captain, James River Batteau Festival)

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Doug P
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Re: sealing new planks on lapstrake

Post by Doug P » Tue Mar 11, 2014 4:53 pm

I personally have not tried this. But Loctite has a good name and is 1/3 to 1/2 the price of 5200


http://www.simplicityboats.com/pl_premium.htm

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Re: sealing new planks on lapstrake

Post by jim g » Tue Mar 11, 2014 6:14 pm

Doug P wrote:I personally have not tried this. But Loctite has a good name and is 1/3 to 1/2 the price of 5200


http://www.simplicityboats.com/pl_premium.htm

It says not recommend for continuous contact with water.

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Doug P
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Re: sealing new planks on lapstrake

Post by Doug P » Tue Mar 11, 2014 6:28 pm

I did see where it is not recommended for continuous underwater use, but the article also includes information from boat builders that maybe of some information to the forum.

kleiner
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Re: sealing new planks on lapstrake

Post by kleiner » Tue Mar 11, 2014 6:40 pm

5200 with plywood planks. Plywood won't swell and take up like solid wood planks, so you need this to seal the seams. It also adds a lot of strength.

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Re: sealing new planks on lapstrake

Post by Jim Bell » Wed Mar 12, 2014 5:55 am

kleiner wrote:5200 with plywood planks. Plywood won't swell and take up like solid wood planks, so you need this to seal the seams. It also adds a lot of strength.

+1 8)

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evansjw44
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Re: sealing new planks on lapstrake

Post by evansjw44 » Wed Mar 12, 2014 12:11 pm

5200 is what I used in the joints of the new strake I put in a few years ago. Its tough stuff. Once cured you have to cut is loose. Its very similar the the thiocol CC used. That was tough stuff too. Some folks like Boat Life.
Jim Evans

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Doug P
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Re: sealing new planks on lapstrake

Post by Doug P » Fri Mar 14, 2014 1:12 am

Jim Bell wrote:I too will be replacing a couple of plank sections on my Sea Skiff soon. I believe 5200 is the proper sealer to use here. It is a sealer/adhesive that maintains it flexibility. Plywood is the plank of choice. I found out there is no 3/8 available in Canada so I have gone to 9mm MERANTI AQUATEC 7 ply (4' X 8' sheet).


Jim are you scarfing the ply boards :!:

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Re: sealing new planks on lapstrake

Post by Jim Bell » Fri Mar 14, 2014 6:04 am

Doug, The sections I am replacing are 3 short planks, 10" to 36" port side aft. They all attach at the transom so I will butt block these pieces. If I was working-in larger planks I would scarf. (after much consideration and expert advice). No epoxy, only CPES and 5200. 8)

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Doug P
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Re: sealing new planks on lapstrake

Post by Doug P » Fri Mar 14, 2014 9:29 am

May be in Midland later this year ....will stop by.

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