Mike,
I thought the whole idea of rebedding a port is so that you will never have  
to do it again?
 
Rummy.........that first drink tasted so good, I think I'll have  
another.....and then another.....
 
 
In a message dated 3/7/2008 5:26:22 P.M. Eastern Standard Time,  
mweisner at ebsmed.com writes:

Ed,

I also assumed Boat Life Seal Sealant (BLSS).  It is  part polyurethane and 
part silicone.  Be careful with the use of  urethance sealants on portlights 
since they will never release if  rebedding or replacement is required.  The 
plastic frames will be  destroyed in the effort.

The problem that you speak of is most often  seen with silicone materials 
which are really only good as gaskets.   They don't stick to much of anything 
for long.  The BLSS seems to  have gotten around this problem, although when 
rebedding portlights, it is  mostly used as a gasket material.  In addition, 
the epoxy repair  should not be exposed to the sealant in this application. 
I have used  epoxy to repair the damage to the wood core from water intrusion 
due to  previous sealant failure.  The epoxy is below the surface (in the  
holes) for these repairs.  The BLSS is exposed to the gel coat and  the 
plastic of the portlight frame.

BTW, as I have indicated,  preparation is most important - DO NOT SKIP THE 
ACETONE CLEANING  STEP.  Placing sealant on a waxed surface will never result 
in good  adhesion.

Mike
s/v Shanghai'd Summer ('81)
Nissequogue River,  NY

From: "Tootle" <ekroposki at charter.net>Sent: Friday, March 07,  2008 5:07 PM

>
> The term Life Seal Sealant was used in the  discussion of leaky ports under
> the subject heading of Tangent Topping  Lift Question.  Can I presume that
> the sealants correct name is  Boat Life Sealant?
>
> I tried to use that Boat Life in the  cockpit drain a couple of years ago.
> It did not hold up.  At the  direction of a professional roofer on this 
> forum
> I used one  part urethane roofing sealant.  It worked as he told me.  I 
>  also
> used it on my project boat rebuild.  The stuff works and  comes in many
> colors.  The brand name Rummy referred me to was  HP-1.
>
> The problem that the Boat Life seemed to have was  adhering to the epoxy
> repair.  I had used Boat Life for years  just as a sealant, but it did not
> want to stick permanently to the  epoxy repair area.  That repair was with
> the West System  products.  Also, the repair was made about this time of
> year,  maybe a few weeks later when it was just warm enough.  I waited 
>  until
> epoxy repair was fully cured.
>
> You might be able  to do it in one day about June 21st.
>
> Ed K
> Greenville,  SC, USA
> “It is not the critic who counts, not the man who points out  how the 
> strong
> man stumbled, or where the doer of deeds could  have done better. The 
> credit
> belongs to the man who is  actually in the arena, whose face is marred by
> dust and sweat and  blood, who strives valiantly, who errs and comes short
> again and  again, who knows the great enthusiasms, the great devotions, and
>  spends himself in a worthy cause, who at best knows achievement and who  at
> the worst if he fails at least fails while daring greatly so that  his 
> place
> shall never be with those cold and timid souls who  know neither victory 
> nor
> defeat.”  Theodore  Roosevelt
>
>
> -- 
> View this message in context:  
>  
http://www.nabble.com/Leaky-Ports---question-on-sealant%27s-name...-tp15907466p15907466.html
>  Sent from the Rhodes 22 mailing list archive at Nabble.com.
>
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