Bedding Deck Hardware With Butyl Tape - Page 29 - SailNet Community
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post #281 of 375 Old 10-01-2013
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Re: Bedding Deck Hardware With Butyl Tape

Good deal Maine. Many thanks for the tips. Will place an order for your top notch butyl as soon as I can get a good estimate for the total feet I'll need. Will be rebedding not only all the deck hardware (and genny track), but also the portlights. Though it's only 25 feet overall, I can imagine that I'll need more than I'm currently estimating off the top of my head.


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post #282 of 375 Old 10-27-2013
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Re: Bedding Deck Hardware With Butyl Tape

I have a transom-hung rudder, with two gudgeons mounted on the transom. When I replaced them last year I bedded them with MaineSail's butyl tape, since they are both above the waterline. I cranked down on the screws as much as I could, but toward the end of the season they loosened up. These things have big bronze backing plates and lock nuts, so I know the screws did not loosen. The butyl apparently oozed out enough for the bedding to become a little thinner.

Is butyl the right application for this, or should I look for a curing sealant to bed the gudgeons? If the latter, what would you recommend?

FWIW, I am replacing the Phillips head bolts with hex head, so in the future I should be able tighten them up mid-season without having to remove the rudder.


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post #283 of 375 Old 10-28-2013 Thread Starter
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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by TakeFive View Post
I have a transom-hung rudder, with two gudgeons mounted on the transom. When I replaced them last year I bedded them with MaineSail's butyl tape, since they are both above the waterline. I cranked down on the screws as much as I could, but toward the end of the season they loosened up. These things have big bronze backing plates and lock nuts, so I know the screws did not loosen. The butyl apparently oozed out enough for the bedding to become a little thinner.

Is butyl the right application for this, or should I look for a curing sealant to bed the gudgeons? If the latter, what would you recommend?

FWIW, I am replacing the Phillips head bolts with hex head, so in the future I should be able tighten them up mid-season without having to remove the rudder.
This is why I stress over, and over, and over again tighten SLOWLY, WAIT, TIGHTEN SOME MORE, WAIT, TIGHTEN SOME MORE... when the butyl STOPS oozing then the fitting is tight. The larger the fitting the longer the process..... The butyl did what it is supposed to do, the just missed installer a step.. keep tightening until it stops oozing and you'll be fine.

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post #284 of 375 Old 10-28-2013
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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by Maine Sail View Post
This is why I stress over, and over, and over again tighten SLOWLY, WAIT, TIGHTEN SOME MORE, WAIT, TIGHTEN SOME MORE... when the butyl STOPS oozing then the fitting is tight. The larger the fitting the longer the process..... The butyl did what it is supposed to do, the just missed installer a step.. keep tightening until it stops oozing and you'll be fine.
That's what I did for a few days, but I had to stop tightening after installing the rudder because it prevented me reaching the bolts with a screwdriver. Hopefully with the hex heads I'll be able to continue tightening after the rudder is re-installed.


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post #285 of 375 Old 10-28-2013 Thread Starter
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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by TakeFive View Post
That's what I did for a few days, but I had to stop tightening after installing the rudder because it prevented me reaching the bolts with a screwdriver. Hopefully with the hex heads I'll be able to continue tightening after the rudder is re-installed.
You should not need to take it apart and start over unless you want to move to HEX. Sometimes placing a heat lamp on the parts can accelerate the displacement portion of the project from a few weeks of spread out small tightening events to a couple of days.......

I once had a t-top / tower install on a sport fishing boat that took three weeks to stop displacing. Owner kept insisting we were done yet I would keep telling him we were not, these bases are quite large. When he would check on it in a few days it was still slowly displacing. I know there is a tendency to stop tightening because it may feel tight but this product is purposely quite dense as the displacement step forces the butyl into every nook and cranny and keeps it in tension.

I can also tell you that deck core, even when dry, will CRUSH, before Bed-It Butyl Tape is fully displaced, if you take it too fast... It is purposely designed to flow like Molasses up hill in January, just be patient with it...

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Last edited by Maine Sail; 10-28-2013 at 07:41 AM.
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post #286 of 375 Old 10-28-2013
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Re: Bedding Deck Hardware With Butyl Tape

I can now understand the need to wait during tightening.

I took my deck handrails off for refinishing/rebidding earlier this year. I reattached them while it was still starting to warm up. I tightened the bolts and as the weather warmed up, the butyl would ooze out more as it warmed up. I haven't seen any leaks since.

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post #287 of 375 Old 10-28-2013
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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by Maine Sail View Post
You should not need to take it apart and start over unless you want to move to HEX.
I definitely want to move to hex head bolts. I've never been happy with the Phillips head bolts.

But I wasn't planning to start over. I was just going to remove and replace one bolt at a time, so that I never fully released the compression. Do you think that is good enough? Or do I need to pull them off, clean, and start over with another too-thick bed of butyl?


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post #288 of 375 Old 10-29-2013 Thread Starter
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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by TakeFive View Post
I definitely want to move to hex head bolts. I've never been happy with the Phillips head bolts.

But I wasn't planning to start over. I was just going to remove and replace one bolt at a time, so that I never fully released the compression. Do you think that is good enough? Or do I need to pull them off, clean, and start over with another too-thick bed of butyl?
It does not sound like you've read the instructions or fully understand the process. You need to bed the items as a single process not as a single bolt. What is under the plate is only PART of the seal what is around each bolt IS the seal..... How are you going to butyl-cone each bolt then push it through.....?

I may suggest re-reading the instructions:

Re-Bedding Instructions

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post #289 of 375 Old 10-31-2013
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Re: Bedding Deck Hardware With Butyl Tape

I finally bought the "miracle butyl" yesterday.

I have never been so freaking excited about tape or sealant.
Something is definitely wrong with me.

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post #290 of 375 Old 10-31-2013
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Re: Bedding Deck Hardware With Butyl Tape

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Originally Posted by Maine Sail View Post
It does not sound like you've read the instructions or fully understand the process. You need to bed the items as a single process not as a single bolt....[/B]
I had read and followed your instructions when I originally installed the new gudgeons, but I had since fogotten this detail. After having re-read your instructions, I'll remove the gudgeons and rebed from scratch. Note, however, that I cannot avoid twisting the bolts because they have a single threaded backing plate. The only way to tighten them is to twist the bolts. There are locknuts behind the backing plate, but they serve only to keep the screws from loosening from the backing plate.


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