SailNet Community - View Single Post - Butyl Tape and leaking port-light
View Single Post
post #7 of Old 09-29-2011
Maine Sail
Senior Member
Maine Sail's Avatar
Join Date: Jan 2003
Location: Maine Coast
Posts: 6,412
Thanks: 22
Thanked 305 Times in 236 Posts
Rep Power: 18
Originally Posted by MastUndSchotbruch View Post
Hm, to add a negative note, I rebedded all my chainplates with grey butyl tape but most of them are still leaking. The holes in the deck where pretty big (chainplates not well fitting) and it was hard to exert enough pressure with the cover plates to squeeze the tape into shape (the plates are held by small screws). I am considering taking them all out again and redo with polysulfite. Big disappointment!
Butyl works best in compression and it sounds like on your boat you can't get enough compression with those big holes, and only screws not through bolts. Probably not the best fit for butyl.

I've bedded lots of chain plates with butyl, and none have leaked, but I choose them carefully. I don't however use butyl on all chain plates and base my decision for its use on the particular design I am working with.

The original chain plates on our CS lasted 31 years without leaking. I only pulled them to inspect them. I then rebedded them with butyl and they've been bomb proof. Our chain plates are a different design though and the plates are through bolted...

Butyl is not always ideal for every bedding situation so don't let one situation get you down on it.

-Maine Sail / CS-36T

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Images In Posts Property of Compass Marine Inc.

Last edited by Maine Sail; 09-29-2011 at 07:16 PM.
Maine Sail is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome