[Rhodes22-list] Leaky Ports - question on sealant's name...

[Michael D. Weisner]

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
>
>
> -- 
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