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How many tubes of caulk needed for a new cap rail.

I am in the middle of a cap/rub rail replacement. Finally, I have gotten to the dry fit stage on the cap. I hope to "install" the cap in the next week and am planning to use 3M 4200 for the install. The new cap is all teak and since I had to buy 1" boards (3/4" thick), the new cap is a bit beefier than the original.

Does anyone know how many tubes of caulk I will probably need? I am more than 150 miles from a West Marine type store and the local boat shop chandlery most likely will not have enough inventory so I will have to have it shipped in.

BTW, I am buying my 316 fasteners from Fair Winds in Rhode Island who I highly recommend.
 
I am going to guess you get 3-4' with one tube. I used a full tube replacing my bow roller an stem fitting. I would plan for 30 tubes.

I would like to know more about this project. How much time was involved, and how much of it are you doing yourself? I would love to replace my rails with plasteak, but I am afraid the cost would approach the value of the boat, and add little to its value. Other than never needing to oil, varnish, sand, or paint ever again.

The most daunting part would be removal of the galley cabinets, which are locked it by my freezer build being a tiny bit higher than the front edge of the cabinets.
 
Good evening Warren. I looked into plasteak, but got a little scared. I have several hours in the removal of the old cap rail including removing the galley cabinets, which I did damage the front of the ice box. Unfortunately Covid 19 caused a delay in the project as one of the two brothers in the boatyard I am in was a fatality due to Covid. I am replacing with teak which I sourced from Homestead Hardwoods in Vickery, Ohio -highly recommend. I also got inspiration from a captain of a Morgan 382 which had done a complete cap rail replacement in Gulfport, MS.
 
For now I just plan to keep the cap rail in good enough condition to not replace. I hate the work though. Boats already have too much work preventing me from sailing. Plasteak has pictures of a M382 with plasteak rails and I think it looks good enough. Doesn't look as nice a real teak, but very functional. I replaced my hand rails with it, and am happy enough that eventually probably everything but the cap rails will be replaced with it.

Also, get an electric or pneumatic chalk gun. My hand was about done after squeezing out a full tube.
 
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