Bedding Deck Hardware With Butyl Tape - Page 35 - SailNet Community
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post #341 of 392 Old 06-10-2014 Thread Starter
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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by BoatyardBoy View Post
I have a question that didn't come up on the searches too well.. I have rebed my diesel fuel fill deck fittings and I'm not sure what to use. I know to use butyl for things that get stressed like life line sanctions, cleats, etc. But these are pretty static pieces and really only see temperature changed. I was thinking something like 4200 or possibly boat life caulk? I don't want them to move nor do I plan on removing them anytime soon since I'm changing the hoses as well. I just figured the butyl will be affected by the diesel fuel.

Anyone have any suggestions on this?

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Sabre bedded fuel fills for years with butyl tape and I've not seen any negatives. I generally recommend a marine sealant for fuel fills if spills can pool around it.

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post #342 of 392 Old 06-12-2014
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Re: Bedding Deck Hardware With Butyl Tape

Hello all.

This is a great thread, which I have been following to some degree as I prepare for tasks with my boat project. Today, I cut out the hole for a deck hatch install expecting to see something like the photos included on the link at the start of this thread to the 'photo how to' on preventing boat through deck rot. However, when I finished cutting the hole, this is what I found. Not a balsa or ply core but a 'hollow-core' build. So, is this normal?

When I look close, I can see about 1mm of gel-coat, fibre glass, then about 12mm of cavity, followed by more fibreglass and then the inside 1mm of what I presume is gel-coat. (yes, metric, it's all I know ) The total deck width is 25mm.

The deck hatch I purchased has an aluminium frame with about 12 holes that I still need to drill. The last photo shows what the previous owner did at the pop top, so I was thinking of inserting strips of timber into the cavity, sealing it with epoxy resin in some fashion, and when its cured, following the process described on page one of this thread.

Any comments or tips before I botch it all up??? Should I use ply or balsa or something else? What is a good way to seal it, do I coat it with epoxy before I insert the timber strips or after?

It was quite a moment when you first cut into your deck with a jigsaw!!!!
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post #343 of 392 Old 06-12-2014
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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by markh3084 View Post
Hello all.

This is a great thread, which I have been following to some degree as I prepare for tasks with my boat project. Today, I cut out the hole for a deck hatch install expecting to see something like the photos included on the link at the start of this thread to the 'photo how to' on preventing boat through deck rot. However, when I finished cutting the hole, this is what I found. Not a balsa or ply core but a 'hollow-core' build. So, is this normal?

When I look close, I can see about 1mm of gel-coat, fibre glass, then about 12mm of cavity, followed by more fibreglass and then the inside 1mm of what I presume is gel-coat. (yes, metric, it's all I know ) The total deck width is 25mm.

The deck hatch I purchased has an aluminium frame with about 12 holes that I still need to drill. The last photo shows what the previous owner did at the pop top, so I was thinking of inserting strips of timber into the cavity, sealing it with epoxy resin in some fashion, and when its cured, following the process described on page one of this thread.

Any comments or tips before I botch it all up??? Should I use ply or balsa or something else? What is a good way to seal it, do I coat it with epoxy before I insert the timber strips or after?

It was quite a moment when you first cut into your deck with a jigsaw!!!!
My Watkins 27 is constructed like this as well. When I removed the forward hatch it had plywood strips inserted into the cavity that the screws went into. The period was rotted so I think I am going to use plywood again but first coat it with epoxy. You can see pictures here ourbigtooth.blogspot.com Since the hatch does not have thru bolts I don't think I can use butyl tape for this application.

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Last edited by Bacchus258; 07-17-2014 at 10:44 PM.
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Re: Bedding Deck Hardware With Butyl Tape

Thank You for such an excellent explanation. I appreciate he time and energy it took for you to present such a good tutorial on this subject. Please pass the countersinks and the butyl tape . Cheers to you.
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post #345 of 392 Old 07-18-2014
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Re: Bedding Deck Hardware With Butyl Tape

I can't find butyl in my area so I will be using 3M4200 in place of it. Wish I could find butyl tape since it would be cheaper if I could buy it in less than the 100 foot roll. Why would I buy a 100 foot roll, when I only need 6 inches? And why would they only sell it that way???????????
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Re: Bedding Deck Hardware With Butyl Tape

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I can't find butyl in my area so I will be using 3M4200 in place of it. Wish I could find butyl tape since it would be cheaper if I could buy it in less than the 100 foot roll. Why would I buy a 100 foot roll, when I only need 6 inches? And why would they only sell it that way???????????
It's not like it's terribly expensive. $30 from Mainesail right? And it will last for years. You'll spend $12 on a bottle of 4200 and next time you try to use it it will be dried up. So I don't think that's a major cost saver.

Last edited by asdf38; 07-18-2014 at 11:28 AM.
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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by Zarathu View Post
I can't find butyl in my area so I will be using 3M4200 in place of it. Wish I could find butyl tape since it would be cheaper if I could buy it in less than the 100 foot roll. Why would I buy a 100 foot roll, when I only need 6 inches? And why would they only sell it that way???????????

Hamilton Marine sells single rolls of Bed-It Tape

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Re: Bedding Deck Hardware With Butyl Tape

Agreed that it is definitely something that is handy to keep on hand. Never know when you might need it, and it's just ideal for so many options.

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Re: Bedding Deck Hardware With Butyl Tape

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Hamilton Marine sells single rolls of Bed-It Tape
That us good to know as it can be an add on to other orders.

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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by Zarathu View Post
I can't find butyl in my area so I will be using 3M4200 in place of it. Wish I could find butyl tape since it would be cheaper if I could buy it in less than the 100 foot roll. Why would I buy a 100 foot roll, when I only need 6 inches? And why would they only sell it that way???????????
Here, ***Buy Bed-It Butyl Tape*** Photo Gallery by Compass Marine How To at pbase.com

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