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Dave5041
Former Mainsheet Editor

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USA
3758 Posts
Initially Posted - 07/29/2014 :  18:27:08  Show Profile
From Sail magazine's Boatworks:

Forget those pricey marine compounds. Rope caulk, a non-hardening stranded putty that costs a few dollars at any hardware store, is ideal for bedding just about anything above the waterline.

Marine bedding compounds generally do an excellent job of sealing deck fittings. However, they can be expensive and messy and tend to cure in the tube when stored for a long time.

When I was refitting my ketch, Silverheels, a professional yacht repairman told me he’d been using rope caulk bedding above the waterline for years and had never had any leaks. I bought some that day, was delighted at how user-friendly it is, and have used it ever since to bed and seal everything from stanchion bases to padeyes to portholes to my anchor windlass. After six years, nothing I’ve bedded with it has ever leaked a drop.
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OJ
Master Marine Consultant

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USA
4382 Posts
Response Posted - 07/29/2014 :  19:15:32  Show Profile
Or this


http://www.sailnet.com/forums/gear-maintenance/63554-bedding-deck-hardware-butyl-tape.html
Edited by - OJ on 07/29/2014 19:15:44
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sethp001
Mainsheet C-25 Tech Editor

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814 Posts
Response Posted - 08/03/2014 :  00:02:01  Show Profile
I use butyl tape on my old roadster and it works well, but the guy who used to own my boat used butyl tape and I have some leaks. I've been using 4200 to re-bed deck hardware, but I think I'm going to test out this rope caulk. Thanks.
Edited by - sethp001 on 08/03/2014 00:14:50
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Reality
Deckhand

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USA
21 Posts
Response Posted - 08/03/2014 :  03:59:11  Show Profile
As RVers also, I use butyl tape for everything. If there is an RV dealership or Camping World near you, you should be able to purchase the same material in a single roll as I'm sure 2 rolls is way too much for a C25...
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britinusa
Web Editor

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USA
5404 Posts
Response Posted - 08/03/2014 :  04:14:12  Show Profile  Visit britinusa's Homepage
I bought one roll several years ago. Every thing that needed rebedding, including the mast base, gps antenna, rails etc. have been bedded in butyl. And I still have enough to do it all over several times.!

Paul
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TakeFive
Master Marine Consultant

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2272 Posts
Response Posted - 08/05/2014 :  07:55:11  Show Profile
quote:
Originally posted by OJ

Or this


http://www.sailnet.com/forums/gear-maintenance/63554-bedding-deck-hardware-butyl-tape.html


I strongly suggest that, for any marine application, you guys purchase the stuff that OJ linked . The rope caulk that you get at the RV store is far inferior. There are dozens of suppliers of butyl tape and rope caulk, and the Maine Sail guy has tested every one of them and picked the supplier that has the best balance of properties for marine applications. It's worth the cost and hassle to get the right stuff.

I speak from experience. I bought some from the RV store, and I'm gradually redoing everything I originally did with it using the Maine Sail material. Seriously, just spend a few extra bucks and buy the stuff that will work well and last for the lifetime of your boat.
Edited by - TakeFive on 08/05/2014 19:40:42
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OJ
Master Marine Consultant

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USA
4382 Posts
Response Posted - 08/05/2014 :  11:23:17  Show Profile
quote:
Originally posted by TakeFive

quote:
Originally posted by OJ

Or this


http://www.sailnet.com/forums/gear-maintenance/63554-bedding-deck-hardware-butyl-tape.html


. . . I strongly suggest that, for any marine application, you guys purchase the stuff that OJ linked . . . Seriously, just spend a few extra bucks and buy the stuff that will work well and last for the lifetime of your boat . . .


And as you are required to purchase two rolls, you can sell the second one on the Swap Meet!
Edited by - on
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danandlu
Navigator

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USA
175 Posts
Response Posted - 08/05/2014 :  19:38:51  Show Profile  Visit danandlu's Homepage
I found it (the good stuff) at a metal roofing supply. Something like $5 a roll if I recall correctly.
Edited by - on
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TakeFive
Master Marine Consultant

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2272 Posts
Response Posted - 08/06/2014 :  03:25:59  Show Profile
quote:
Originally posted by danandlu

I found it (the good stuff) at a metal roofing supply. Something like $5 a roll if I recall correctly.

What makes it "the good stuff"?
Edited by - on
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danandlu
Navigator

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USA
175 Posts
Response Posted - 08/06/2014 :  06:21:07  Show Profile  Visit danandlu's Homepage
quote:
Originally posted by TakeFive

quote:
Originally posted by danandlu

I found it (the good stuff) at a metal roofing supply. Something like $5 a roll if I recall correctly.

What makes it "the good stuff"?


As described in the article submitted by OJ - http://www.sailnet.com/forums/gear-maintenance/63554-bedding-deck-hardware-butyl-tape.html
Edited by - on
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Kim Luckner
1st Mate

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USA
99 Posts
Response Posted - 08/06/2014 :  06:31:14  Show Profile
Sailrite sells a similar product. http://www.sailrite.com/Trimmable-Butyl-Tape-3-4-Bedding-Deck-Hardware-Sealant?gclid=CLWIp5fV-b8CFcZDMgodRAkAYQ. $13.95 for 1 roll, no minimum.
Edited by - on
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TakeFive
Master Marine Consultant

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2272 Posts
Response Posted - 08/06/2014 :  06:52:05  Show Profile
quote:
Originally posted by danandlu

quote:
Originally posted by TakeFive

quote:
Originally posted by danandlu

I found it (the good stuff) at a metal roofing supply. Something like $5 a roll if I recall correctly.

What makes it "the good stuff"?


As described in the article submitted by OJ - http://www.sailnet.com/forums/gear-maintenance/63554-bedding-deck-hardware-butyl-tape.html

What you bought is not the same material that your roofing supplier sells. IMO it is not appropriate to call roofing material "the good stuff."

If you read [url="http://www.pbase.com/mainecruising/rebedding_hardware&page=1"]MaineSail's website
Edited by - TakeFive on 08/06/2014 06:59:42
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danandlu
Navigator

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USA
175 Posts
Response Posted - 08/06/2014 :  08:02:29  Show Profile  Visit danandlu's Homepage
Rick -

What I purchased has the same properties as described. Really.
Edited by - on
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TakeFive
Master Marine Consultant

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2272 Posts
Response Posted - 08/06/2014 :  08:24:22  Show Profile
quote:
Originally posted by danandlu

Rick -

What I purchased has the same properties as described. Really.

I seriously doubt it, but if someone is willing to buy both and videotape a comparative stretch test, I would love to see it. The Maine Sail stuff will elongate to over 500% before breaking. I haven't seen anything that compares to that. Actually it never even breaks - it just stretches so much that it becomes a think string.

Why is this important? If you put a 10 mil thick bed under a stanchion and stress the stanchion, you will need it to elongate to 50 mil thick without breaking the film.
Edited by - TakeFive on 08/06/2014 10:01:16
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danandlu
Navigator

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USA
175 Posts
Response Posted - 08/06/2014 :  12:25:03  Show Profile  Visit danandlu's Homepage
quote:
Originally posted by TakeFive

quote:
Originally posted by danandlu

Rick -

What I purchased has the same properties as described. Really.

I seriously doubt it, but if someone is willing to buy both and videotape a comparative stretch test, I would love to see it. The Maine Sail stuff will elongate to over 500% before breaking. I haven't seen anything that compares to that. Actually it never even breaks - it just stretches so much that it becomes a think string.

Why is this important? If you put a 10 mil thick bed under a stanchion and stress the stanchion, you will need it to elongate to 50 mil thick without breaking the film.


Indeed the properties of the sealant is important. The material I bought from the metal roofing supply is gray in color, elongates almost indefinitely but will "snap" if you pull it suddenly - similar to the silly putty stuff we had as kids. It is identical to the demonstration in the article we've been referring to. It is nothing like the rolled RV caulk that some people think is the same stuff - I think it is sometimes referred to as "butyl" also.

I am on my way out of town (long weekend sailing!) and will stop by my local supplier and verify that it's the same stuff I purchased a couple or more years ago. (I called this morning and they quoted a 3/8" roll for $3.18 and a 3/4" roll for $5, they are willing to ship also). I won't be doing any video demos but if you're interested I'll be glad to give you all the info for ordering or I can send you a piece via snail mail if you like.
Edited by - danandlu on 08/06/2014 12:33:10
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TakeFive
Master Marine Consultant

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2272 Posts
Response Posted - 08/06/2014 :  13:05:56  Show Profile
quote:
Originally posted by danandlu

quote:
Originally posted by TakeFive

quote:
Originally posted by danandlu

Rick -

What I purchased has the same properties as described. Really.

I seriously doubt it, but if someone is willing to buy both and videotape a comparative stretch test, I would love to see it. The Maine Sail stuff will elongate to over 500% before breaking. I haven't seen anything that compares to that. Actually it never even breaks - it just stretches so much that it becomes a think string.

Why is this important? If you put a 10 mil thick bed under a stanchion and stress the stanchion, you will need it to elongate to 50 mil thick without breaking the film.


Indeed the properties of the sealant is important. The material I bought from the metal roofing supply is gray in color, elongates almost indefinitely but will "snap" if you pull it suddenly - similar to the silly putty stuff we had as kids. It is identical to the demonstration in the article we've been referring to. It is nothing like the rolled RV caulk that some people think is the same stuff - I think it is sometimes referred to as "butyl" also.

I am on my way out of town (long weekend sailing!) and will stop by my local supplier and verify that it's the same stuff I purchased a couple or more years ago. (I called this morning and they quoted a 3/8" roll for $3.18 and a 3/4" roll for $5, they are willing to ship also). I won't be doing any video demos but if you're interested I'll be glad to give you all the info for ordering or I can send you a piece via snail mail if you like.

Thank for the summary. It does sound like you have a good idea of what the desirable properties should be, and your source my have the right balance of properties.

I'm headed out of town also, so let's wait a few days and pick this up later. I would be interested in seeing a sample and making the comparison. Competition is a good thing, and if there's a lower cost source for stuff that's essentially the same, it would be good to know about.
Edited by - TakeFive on 08/06/2014 13:07:24
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OJ
Master Marine Consultant

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USA
4382 Posts
Response Posted - 08/07/2014 :  06:29:08  Show Profile
You've got the consummate boat technician who has tested a variety of marine products over a number of years. If I were to venture a guess, I think he provides services for high-end ocean going yachts that demand the best products and craftsmanship. He has taken the time to share his professional knowledge and experience.

I'm scratching my head just a little here as to why you would risk using an inferior product for maintenance that is often tedious and time consuming - even for wee little puddle jumpers like ours.
Edited by - on
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danandlu
Navigator

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USA
175 Posts
Response Posted - 08/11/2014 :  16:13:54  Show Profile  Visit danandlu's Homepage
quote:
Originally posted by danandlu

quote:
Originally posted by TakeFive

quote:
Originally posted by danandlu

Rick -

What I purchased has the same properties as described. Really.

I seriously doubt it, but if someone is willing to buy both and videotape a comparative stretch test, I would love to see it. The Maine Sail stuff will elongate to over 500% before breaking. I haven't seen anything that compares to that. Actually it never even breaks - it just stretches so much that it becomes a think string.

Why is this important? If you put a 10 mil thick bed under a stanchion and stress the stanchion, you will need it to elongate to 50 mil thick without breaking the film.


Indeed the properties of the sealant is important. The material I bought from the metal roofing supply is gray in color, elongates almost indefinitely but will "snap" if you pull it suddenly - similar to the silly putty stuff we had as kids. It is identical to the demonstration in the article we've been referring to. It is nothing like the rolled RV caulk that some people think is the same stuff - I think it is sometimes referred to as "butyl" also.

I am on my way out of town (long weekend sailing!) and will stop by my local supplier and verify that it's the same stuff I purchased a couple or more years ago. (I called this morning and they quoted a 3/8" roll for $3.18 and a 3/4" roll for $5, they are willing to ship also). I won't be doing any video demos but if you're interested I'll be glad to give you all the info for ordering or I can send you a piece via snail mail if you like.


I'm baaaaaaaaaaaaack! Sailing and anchoring out was great.

I stopped at the supplier I've been talking about and what I bought years ago is the same stuff they offer now. They gave me a product sheet reproduced here - .pdf http://marcoindustries.com/pdfs/mastix.pdf. My local distributor is Epic Steel, 6574 Hwy 10 West, Missoula, MT 59808, 406-542-1711. I am guessing that there are other distributors around the country but I haven't checked. If this helps someone save a few dollars for what is the essentially the same product than I'm glad to have helped. In hindsight maybe I should have bought a few cases, labeled it "marine"......
Edited by - on
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zeil
Master Marine Consultant

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Canada
1314 Posts
Response Posted - 08/11/2014 :  21:22:23  Show Profile



Price in $CDS... one roll... worth it??
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