Yes.  Butyl tape (more common in RVs) and putty are still commonly used in RV and marine applications where silicone-based caulk is not appropriate.

Plumbers putty would work on your through-hull fittings for shore power and fresh water … and would probably clean-up better the butyl.

 
> On 16-Apr-2019, at 17:30, ddbjorkman@verizon.net <ddbjorkman@VERIZON.NET> wrote:
> 
> RV putty??  What is that.  Like plumbers putty?
> Dave B.
> 
> -----Original Message-----
> From: Don Dahl <don_dahl@hotmail.com>
> To: ddbjorkman@verizon.net <ddbjorkman@VERIZON.NET>
> Sent: Tue, Apr 16, 2019 3:59 pm
> Subject: RE: Electric utility connection
> 
> #yiv6356181220 #yiv6356181220 -- .yiv6356181220EmailQuote {margin-left:1pt;padding-left:4pt;border-left:#800000 2px solid;}#yiv6356181220  #yiv6356181220 #yiv6356181220 _filtered #yiv6356181220 {} _filtered #yiv6356181220 {font-family:Calibri;} #yiv6356181220 p.yiv6356181220x_MsoNormal, #yiv6356181220 li.yiv6356181220x_MsoNormal, #yiv6356181220 div.yiv6356181220x_MsoNormal {margin:0cm;margin-bottom:.0001pt;font-size:11.0pt;font-family:sans-serif;} #yiv6356181220 a:link, #yiv6356181220 span.yiv6356181220x_MsoHyperlink {color:blue;text-decoration:underline;} #yiv6356181220 a:visited, #yiv6356181220 span.yiv6356181220x_MsoHyperlinkFollowed {color:#954F72;text-decoration:underline;} #yiv6356181220 .yiv6356181220x_MsoChpDefault {} _filtered #yiv6356181220 {margin:72.0pt 72.0pt 72.0pt 72.0pt;} #yiv6356181220 div.yiv6356181220x_WordSection1 {} #yiv6356181220 If you remove just reapply some rv putty .don Sent from Mail for Windows 10 From: Vanagon Mailing List <vanagon@gerry.vanagon.com> on behalf of ddbjorkman@verizon.net <ddbjorkman@VERIZON.NET>
> Sent: Tuesday, April 16, 2019 12:54:13 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Electric utility connection Hi all.  I am replacing my electric utility connection on the side of the bus.  There is some kind of putty just around the edge of the hole in the side of the bus,  Probably from the restoration job in 2012.  It's still pliable.  Should I replace, remove or leave it alone?
> Dave B.