Caulking under a new rub rail.

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Recess

I have some questions about doing this replacement of my rub rail for those that have done it.

Do you try and remove as much old caulking as possible?

Do you apply, allow to cure, or do you apply just before you fasten the new rub rail to achieve a seal from the joint to the rub rail?

About how many (ball park) tubes of 10 oz marine caulk will it take to recaulk an O'day 25? (I am thinking of using 3M Adhesive Sealant 5200)

Thanks

Dave
 
Joe11688

Joe11688

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Jan 24, 2005
4,881
Oday 222 Dighton, Ma.
Caulking under the rub rail

Dave,
I removed all the old caulking and cleaned the area with acetone when I did mine a few years ago. I used Boat life Boat Caulking in a tube for a caulking gun, but if I had it to do over again, I'd have used 3-M 4000 UV Marine adhesive sealant. If fact, I think that I used some of it on part of the area under the rub rail that day. I had bought a tube of Boat life at a local marine store and guess what? The stuff was no good. It had set up, and I ruined my caulking gun. So I brought it back and the guy gave me another tube of the stuff, but that's the last time I'll ever use B.L. Caulking. You could use the 3-M 5200, but if it's anything like the GE 5200, you would need to use a hammer and chisel to get any hardware off after you used that stuff. You definitely wouldn't want to use 5200 on a plastic forward hatch. My first choice would be the 3-M 4000 UV, and my second choice would be the 3-M 4200. I would definitely use a Polysulfide caulking and not a silicon. You may be able to get away with two tubes for your boat. When I did my boat, I did half of it at a time and reinstalled the molding and rubber as I went along. It's an easy job.
Joe
 
Shoaldrafter

Shoaldrafter

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Dec 8, 2006
1,085
Oday 26 Starr, SC
Boat Life

Boat life is a small company trying to make it against the big boys. They make Boat Life Sealant and Boat Life Caulk. The Boat Life Sealant is the good stuff, the boat life caulk agrivates everybody. I wrote them an email telling to put each into a distinctive packaging but they never emailed back. I will try the 3-M 4000 UV Marine adhesive sealant the next time around. It just is not stocked at marinas. On a boat, there is flexing of the fiberglass which eventually causes leaks at any seal. You need to be able to come back and fix again.

Never use the the 5200's on anything, notwithstanding the manufacturers using it. As stated it hardens up too good and when trying to remove to repair something, you destroy everything. The alledged 5200 releasing agents do not go aground corners. So if somehow you get another leak, forget fixing it without destroying the boat if you use a 5200 series product.

Ed K
26
 
R

Recess

Thank You

It has been a busy two days. Had not had a chance to respond.

Thanks again
 
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