As a requirement for repairing and repainting the deck and cabin top I have pulled every piece of hardware on my 1982 C&C 37 with the exception of the toe-rail. Virtually every item was installed with butyl. When we bought the boat many years ago I would add hardware or replace hardware like any obsessive boat owner would do and I would use sealants from 3M, Boatlife and Sika.
Every item sealed with butyl was dry and leak-free. Those items that I installed with the other products eventually failed and/or leaked. Given my general ineptitude those failures were probably my fault. But... With the fact that the deck had almost no wet core, it was an easy decision to re-bed with the same material. I have re-bedded all of the hardware with butyl except where the manufacturer recommends a specific sealant, the plastic Beckson opening ports coming to mind. One thing that continually runs through my mind as I go about the process of re-bedding using butyl is the incredible amount of effort and time required to apply it. Were I a boat builder looking to keep labour costs down, I would probably be using tube sealants. My $0.02 (US). Regards, Dave Godwin 1982 C&C 37 - Ronin Reedville - Chesapeake Bay Ronin’s Overdue Refit <http://roninrebuild.blogspot.com/> > On May 22, 2020, at 6:12 AM, Nathan Post via CnC-List <cnc-list@cnc-list.com> > wrote: > > I am repainting the deck and the rebedding the hardware. The original > hardware (gel coat under it) used butyl tape and in most places had not > failed. The parts also come up easily when you want to pull them off. The > ones using 4200 or equivalent have failed, often around the screws, it is > brittle, yet they don’t always come off easily unless completely failed > (cutting under the part is often needed). I will be using butyl when I put it > back together. > Nathan > S/V Wisper > Lynn MA > > - - >> On May 22, 2020, at 5:52 AM, Graham Collins via CnC-List >> <cnc-list@cnc-list.com> wrote: >> >> >> C&C (or a previous owner) used butyl everywhere on my boat, and while it had >> failed in a few spots I'd add that the 4200 I used on a hatch failed after 2 >> years, so both can fail... The hatch is on with butyl now, for 6 years, no >> problem. >> >> Graham Collins >> Secret Plans >> C&C 35-III #11 >> On 2020-05-22 12:45 a.m., cscheaffer via CnC-List wrote: >>> I'm rebedding deck hardware and bought Butyl Tape but I'm not convinced >>> this is best for me. Butyl has a cult following but it was not chosen by >>> C&C during the build except for the hull deck joint. I like 3M 4200 and >>> 4000uv. Anybody have opinions on Butyl being better? >>> >>> >>> >>> Sent from my Verizon, Samsung Galaxy smartphone >>> >>> >>> >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each and >>> every one is greatly appreciated. If you want to support the list - use >>> PayPal to send contribution -- https://www.paypal.me/stumurray >>> <https://www.paypal.me/stumurray> >>> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray >
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