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 Any tips on removing old window sealant ?		  New Topic  Topic Locked
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Davy J
Master Marine Consultant

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USA
1511 Posts
Initially Posted - 03/13/2011 :  16:55:16  Show Profile
The 4 acrylic windows on my boat have been leaking. In the past, I have used an automotive "flowable" sealant to stop the leaks. However, this time, I no longer can stand to look at the ugly windows and have decided to replace them.

After removing the screws, the windows came off easily. But the sealant on the boat has become a bear. Three or four hours of scraping and still not all the old sealant has been removed.

BTW, the PO had replaced the windows and used some type of black sealant.
Any advice ?
Davy J


2005 Gemini 105Mc
PO 1987 C25 #5509 SR/SK
Tampa Bay
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NautiC25
Admiral

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USA
957 Posts
Response Posted - 03/14/2011 :  06:37:41  Show Profile
I can't wait to hear any advice on this as I'd like to do the same.

Where did you get the new lenses? Did you have them custom made? Have you tried having them professionally cleaned up like auto headlamps?
Edited by - NautiC25 on 03/14/2011 06:40:28
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Davy J
Master Marine Consultant

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USA
1511 Posts
Response Posted - 03/14/2011 :  06:52:43  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Have you tried having them professionally cleaned up like auto headlamps?<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
No, there is alot of crazing, (small cracks), which, cannot be removed.
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Where did you get the new lenses? Did you have them custom made?<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
I will be fabricating them from acrylic sheeting.
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NautiC25
Admiral

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USA
957 Posts
Response Posted - 03/14/2011 :  06:58:17  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Davy J</i>
<br /> <blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Where did you get the new lenses? Did you have them custom made?<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
I will be fabricating them from acrylic sheeting.
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
Nice! What do you use to cut them? I thought they had to be professionally cut because they crack easy.
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Davy J
Master Marine Consultant

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USA
1511 Posts
Response Posted - 03/14/2011 :  07:17:47  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Nice! What do you use to cut them? <hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
I use an 80 tooth saw blade on a table saw to cut the raw pieces. Then, the pieces will be clamped to a plywood template and I will use a three bladed cut-off bit on a router to trim the windows to size.
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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts
Response Posted - 03/14/2011 :  07:41:30  Show Profile
Davy, Did you try a heat gun on the sealant? That might soften it enough to ease removal. If you have thin areas of residue left I would try "Goof Off".
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mlg3733
Navigator

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118 Posts
Response Posted - 03/14/2011 :  08:00:25  Show Profile
Acetone
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Tom Gauntt
Navigator

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204 Posts
Response Posted - 03/15/2011 :  16:49:42  Show Profile
When rebedded mine last year, I used acetone and a Dremel oscillating tool with a sharp scraping blade. What worked best was keeping the Dremel blade clean and even a little damp with acetone. Getting the sealant off is a bear no matter what, but the oscillating tool really made it go much, much faster.
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