[Rhodes22-list] Rubber gasket

Sat Aug 18 18:40:44 EDT 2018

Just so that there is no confusion, I did make a neoprene gasket and it is installed. It is 3/16 thick but has a fine ribbed pattern that I think did not compress enough to make a perfect seal. It might also be too hard. So I am only using the butyl to give the neoprene a smoother surface - not substituting the neoprene with the butyl. Nevertheless, I think I will replace the gasket when I can find a Canadian source.

Another issue that might explain my difficulty getting a good seal is that it looks to me like the flange on the cap might have been trimmed at some point. The lip is only about 1 1/4 inch wide and allows for only a single row of bolts. The base is quite a bit wider and appears to have had a second row of bolts at some point. It makes sense that both parts would be the same width.

I really don't want to take this apart again to replace the gasket and rebuild the cap.

Graham

-----Original Message-----
From: Rhodes22-list [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Gary Novotny
Sent: Saturday, August 18, 2018 2:40 PM
To: The Rhodes 22 Email List
Subject: Re: [Rhodes22-list] Rubber gasket

Yep, totally agree that things bedded with urethane sealants are a bitch 
to remove. Only use this stuff as a last resort if you can’t find proper 
gasket material. Also I'd be sure the pendant and  all blocks are in 
excellent condition. If not, definitely replace. The problem I see with 
Butyl for this application is that it has no adhesive properties , so 
you are counting on the cap to trunk compression to keep it sealed and 
it’s not resilient like a neoprene gasket. If the trunk is subject to 
any significant flexing at all then the compression seal could start to 
develop leaks. If I did use Butyl tape, I'd keep a close eye on it. One 
good thing is that Butyl tape would be VERY easy to replace.

Gary

On 8/18/2018 12:55 PM, Graham Stewart wrote:
> Like Gary I used butyl extensively as a bedding material for my hardware and it is a dream to use compared to other sealants. The only place below the waterline where I used it was the centerboard cap and only then because I was getting desperate to find a solution. Gary's cautionary note is  good reason to keep looking for the proper neoprene - something I will do if/when the butyl fails or I have to remove the cap for any other reason.
>
> 4200 sealant is easier to remove than 5200, which is almost impossible without destroying the parts,  but would still be extremely difficult - especially for such a large area. When I bought my boat a previous owner had used one of those high-adhesive sealants  and I spent literally days getting the cap off using a torch to heat a large knife that I slowly moved along the join. Even then I still broke the cap into two pieces and had to make extensive repairs to the cap and the base.
>
> I don't know if there is anything like butyl that has low adhesive characteristics and is still rated for below the waterline use.
>
> For the time being the butyl is working but I will let the list know if it begins to fail - assuming the boat doesn't sink and take me with it.
>
>
> Graham Stewart
> Agile 1976 Rhodes 22
> Kingston Ontario
>
>
>
>
> -----Original Message-----
> From: Rhodes22-list [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Gary Novotny
> Sent: Saturday, August 18, 2018 9:38 AM
> To: The Rhodes 22 Email List
> Subject: Re: [Rhodes22-list] Rubber gasket
>
> Guys,
>
> I love Butyl tape, it's really great as a bedding compound. I completed
> the first round of restoration on a boat (not my Rhodes) three months
> ago and I used this stuff extensively for all the deck fittings and a
> hatch. Butyl tape like all sealants needs a clean surface so use Remov
> or DeBond first if the surface has prior sealant contamination. I can't
> say enough good things about the ease of Butyl tape installation and
> cleanup. All the leaking fittings are fixed now. It is too early for me
> to report on longevity, but others have had very good results and when
> you do need to re-bed its easy.
>
> I wouldn't be comfortable using this below the waterline however. If you
> can't get neoprene sheet, you might be better off resorting to a
> traditional moderately adhesive sealant like 3M 4200. (Do NOT use 5200)
>
> Just my 2cents.
>
> Gary
>
>
> On 8/17/2018 2:56 PM, Graham Stewart wrote:
>> Patrick:
>>
>> Glad to hear that there is another Rhodie in Canada. I thought Phil Gautier and I were the only ones.
>>
>> I replaced my gasket last year but was unable to find the proper neoprene. I finally got some neoprene from a neighbor but it wasn't smooth surfaced so it leaked no matter how many bolts I added. I finally stopped the leaks by using butyl tape - not an ideal solution, but it worked well. Butyl is an excellent sealant but has very low adhesive qualities so it should be easy to remove in the future should that be necessary. The tape is about 3/4" wide but I only used about half of that on both sides of the gasket as I didn't want to have it squeeze into the centerboard slot. I would not use the butyl that comes in a tube. In fact only use the butyl if you can't get the proper neoprene.
>>
>>
>> Graham Stewart
>> Agile 1976 Rhodes 22
>> Kingston Ontario.
>>
>>
>> -----Original Message-----
>> From: Rhodes22-list [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Patrick Cheung
>> Sent: Friday, August 17, 2018 2:11 PM
>> To: The Rhodes 22 Email List
>> Subject: Re: [Rhodes22-list] Rubber gasket
>>
>> Gary,
>>
>> I found the perfect one from Amazon but they won’t ship to Canada. Gonna keep looking.
>>
>> Thx, Patrick
>>
>>
>>
>>> On Aug 17, 2018, at 1:32 PM, Gary Novotny <gjnovotny at comcast.net> wrote:
>>>
>>> Patrick,
>>>
>>> When I did my centerboard trunk maintenance four years ago I used neoprene sheet I bought off of Amazon. It seems to have worked well.
>>>
>>> Gary
>>>
>>> Moon shadow 1978 R22
>>>
>>>
>>>> On 8/17/2018 11:50 AM, Patrick Cheung wrote:
>>>> Dear Rhodies,
>>>>
>>>> It is time to repair the center board. I reached out to Stan for a piece of
>>>> the rubber but he is super busy right now.
>>>>
>>>> I seems to recall some Rhodies may have extra rubber left over from their
>>>> repair. I am hoping I can buy a stripe off you, if you are willing to sell.
>>>>
>>>> Patrick
>>>> Duck, '84
>>>> Lake Simcoe, Ontario, Canada
>>>> __________________________________________________
>>>> To subscribe/unsubscribe go to http://www.rhodes22.org/mailman/listinfo/rhodes22-list
>>>>
>>>> For the list Charter and help with using the mailing list and archives go to http://www.rhodes22.org/list
>>>> __________________________________________________
>>>>
>>> -- 
>>> Gary Novotny
>>> 7309 S Indian River Drive
>>> Fort Pierce Florida 34982
>>> 772-4660956 home
>>> 772-9715753 cell
>>> gjnovotny at comcast.net
>>>
>>> __________________________________________________
>>> To subscribe/unsubscribe go to http://www.rhodes22.org/mailman/listinfo/rhodes22-list
>>>
>>> For the list Charter and help with using the mailing list and archives go to http://www.rhodes22.org/list
>>> __________________________________________________
>> __________________________________________________
>> To subscribe/unsubscribe go to http://www.rhodes22.org/mailman/listinfo/rhodes22-list
>>
>> For the list Charter and help with using the mailing list and archives go to http://www.rhodes22.org/list
>> __________________________________________________
>>
>> __________________________________________________
>> To subscribe/unsubscribe go to http://www.rhodes22.org/mailman/listinfo/rhodes22-list
>>
>> For the list Charter and help with using the mailing list and archives go to http://www.rhodes22.org/list
>> __________________________________________________

-- 
Gary Novotny
7309 S Indian River Drive
Fort Pierce Florida 34982
772-4660956 home
772-9715753 cell
gjnovotny at comcast.net

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