Waterproofing a Spartight Partner

  • 27 Mar 2016 12:00
    Reply # 3907494 on 3905165

    On 7 Dec 15 Arne Kverneland wrote:

     

    PS: I have seen a hybrid method in used, on the schooner Samson: The mast was first secured with wedges, and after they had been hammered into position, after some sailing in, the top end of the wedges were cut off flush with the partners. Then a thick (1cm-1.5cm) layer of polyurethane putty was smeared on, holding the wedges lightly together and hindering any rain from entering. No mast jacket needed.

    Samson's foremast partners here:

     

    Perhaps I should also investigate "polyurethane putty". 

     

     

     

  • 27 Mar 2016 11:45
    Reply # 3907480 on 3905165

    Asmat, Thanks.  Jonathan  

    Last modified: 27 Mar 2016 11:45 | Anonymous member
  • 27 Mar 2016 11:09
    Reply # 3907467 on 3906748
    Jonathan Snodgrass wrote:
    Erik and Evi Menzel Ivey wrote:

    Jonathan - I'd be curious what holds our partners in.  We have tapered hole a flange that bolts down on the deck.  Our urethane partners are slightly tapered to match the hole, and the flange presses them in like wedges.  I use butyl rubber - any larger/commercial window store should carry it - to seal any of the gaps.  Its very clean to work with and reasonably easy to remove. Even if you just push it into the gaps it should perform well.

    Erik


    I shall enquire further about Butyl Ribber.  Many thanks.
    Jonathan, butyl rubber sealant goes by the trade name Arbo Mast BR.
  • 26 Mar 2016 17:45
    Reply # 3906748 on 3905712
    Erik and Evi Menzel Ivey wrote:

    Jonathan - I'd be curious what holds our partners in.  We have tapered hole a flange that bolts down on the deck.  Our urethane partners are slightly tapered to match the hole, and the flange presses them in like wedges.  I use butyl rubber - any larger/commercial window store should carry it - to seal any of the gaps.  Its very clean to work with and reasonably easy to remove. Even if you just push it into the gaps it should perform well.

    Erik


    I shall enquire further about Butyl Ribber.  Many thanks.
  • 25 Mar 2016 21:51
    Reply # 3905712 on 3905165
    Deleted user

    Jonathan - I'd be curious what holds our partners in.  We have tapered hole a flange that bolts down on the deck.  Our urethane partners are slightly tapered to match the hole, and the flange presses them in like wedges.  I use butyl rubber - any larger/commercial window store should carry it - to seal any of the gaps.  Its very clean to work with and reasonably easy to remove. Even if you just push it into the gaps it should perform well.

    Erik

  • 25 Mar 2016 16:53
    Reply # 3905326 on 3905221
    Asmat Downey wrote:

    Hello Jonathan, I'd run a bead of polyurethane sealant, Sikaflex or similar, on top of the Spartite around the mast. It is much more reliable than silicone, can be painted and sticks like stuff to a blanket. When the time comes to extract the mast, slitting this seal with a Stanley knife should free it.

     


    Thank you Asmat.  Jonathan
  • 25 Mar 2016 15:41
    Reply # 3905221 on 3905165

    Hello Jonathan, I'd run a bead of polyurethane sealant, Sikaflex or similar, on top of the Spartite around the mast. It is much more reliable than silicone, can be painted and sticks like stuff to a blanket. When the time comes to extract the mast, slitting this seal with a Stanley knife should free it.


  • 25 Mar 2016 14:32
    Message # 3905165

    On Lexia the through deck partner for both mast is made of Spartight.  The top of the join between the Spartight and the mast was then sealed with a bead of silicone to stop the water from the mast running down into the boat.  Then a split canvas boot was fitted which was taped at the top, also to keep out water. 

     

    Inevitably, over time, these water resisting arrangements have decayed eg the tape leaks and the silicone bead leaks. 

     

    The waterproofing of these through mast joints will shortly get to the top of the list of maintenance tasks. 

     

    I could again use a silicone bead between the top of the Spartight and the mast and again tape round the top of the canvas boot and it would probably be satisfactory for a year or two before the joints start to leek again. 

     

    I am pretty sure, however, that in the not too distant past I saw discussion on a forum of the best ways to keep the water out and I remember thinking about one solution offered (was it by Paul Thomson?) and thinking "That's the answer.  I must remember that!"  

     

    However, as is increasingly the way of these things, I can't remember what the solution was.  Neither can I find it by searching through the fora.

     

    I would be grateful for any advice either with a pointer to the previous discussion or suggestions as to how best to proceed.

     

    Many thanks.   

    Last modified: 25 Mar 2016 14:34 | Anonymous member
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