[Shop-talk] Wire splice sealant

Mon Mar 17 11:11:58 MDT 2025

Fellow gear-heads,

I have to admit, I'm surprised that everyone seems to be against buying a 
new type of tool! 8>)

Seriously, I currently use these types of heat shrink tubing.  My problems 
is that I never seem to know if I completely 'sealed' them with heat, and 
that is only if I remember to put the tubing on the write PRIOR to making 
the connection.  DOH!  Also, the precut stuff always seems to be 'just 
long enough' if that.

I don't mind putting out the money for this, but I would want to make sure 
it is actually AS GOOD or BETTER than tubing.  Like I said, I do salt 
water marine stuff a lot and would like to make sure things that are 
completely submerged are going to be fine.

I don't like that there doesn't seem to be molds for bigger connections (o 
or greater wire.)

Currently, I typically make the butt connection, then the heat shrink 
tubing, then silicone tape. This would save steps and be neater in the 
end.

But does anyone (preferably someone in the EE field) see any problems with 
this,  or that it isn't as good as heat shrink tubing?

Thanks

Moose

From:   Thomas FitzGibbon <fitzgibbon3 at comcast.net>
To:     Jeff Scarbrough <fishplate at gmail.com>, Ronnie Day 
<ronnie.day at gmail.com>
Cc:     "shop-talk at autox.team.net" <Shop-talk at autox.team.net>
Date:   03/17/2025 12:58 PM
Subject:        Re: [Shop-talk] Wire splice sealant
Sent by:        "Shop-talk" <shop-talk-bounces at autox.team.net>

Glue-lined heat shrink is cheap, easy, fast and effective.  I use it on my 
boat for every wire splice putting it over a glue-lined wire splice 
connector or end terminal.  Just remember to slip the heat shrink on 
before you finish the splice or attach the terminal.  I've been very 
pleased with the pre-cut tubes from Wirefy from Amazon (
https://www.amazon.com/dp/B09NW7954L?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4
) but you can also get good quality bulk rolls from Amazon which can be 
more economical than the pre-cut selections. 
On 03/17/2025 7:08 AM EDT Jeff Scarbrough <fishplate at gmail.com> wrote: 

On Sun, Mar 16, 2025, 21:28 Ronnie Day <ronnie.day at gmail.com> wrote: 
Jeff looks very interesting. I’m guessing it comes in a range of sizes? 
Where did you get it from? 

The answer is always McMaster-Carr 

https://www.mcmaster.com/products/adhesive-lined-heat-shrink-tubing/ 

But we probably got it from DigiKey back when I was buying it.  You will 
have to poke around in their catalog to find it, though.  This phone 
screen is too small. 

Thanks, Ron 

On Sun, Mar 16, 2025 at 7:59 PM Jeff Scarbrough <fishplate at gmail.com> 
wrote: 
We used to get 3M heat shrink tubing with glue/sealant inside.  I never 
had a problem with that, and it was 1/10th the trouble that this appears 
to be. 

https://www.3m.com/3M/en_US/p/d/b5005036041/ 

On Sun, Mar 16, 2025 at 8:33 PM Moose <eric at megageek.com> wrote: 
Braintrust- 

Have any of you ever see this... 
https://www.amazon.com/SpliSeal-Professional-Kit-Complete-Connectors/dp/B0D9B8DCTW/ref=sr_1_3?crid=3BUKL0P7IVNW9&dib=eyJ2IjoiMSJ9.3Vxo7hR7mEIZ12qx2hsVtgw_kpHNEDXU0ensnUgqGLMqzHtH1jgBc3PlzJU5eSi3rQJTzyk84gcxa-O93kQVc5Ayt7RY4c1WGvHjW1cJOwfbotkXaaBBMl0Zm7WyBNEiuKWSDpLTpS7C9ETdliro6ZPNYxvI97c1qawWiTSQYe_dkzYi2mMD2tl-YL1OM1sWCoUTCt6dQUuNx8XIWpbtIZvKQKJzF7CCh9i82mlJ4bg.c3aPekELXi9S7dY-5c2uW2t1ipGSld 
6iTm8nqC1TsIY&dib_tag=se&keywords=spliseal+hot+glue+wire+splice+molds&qid=1742170485&sprefix=spliseal+%2Caps%2C176&sr=8-3 

Seems crazy expensive, but I do lots of marine wires and if they are 
really better, I can make the case to buy it. 

Anyone ever use it?  There is only one review, and it seemed their were 
problems with the order. 

Looking forward to what you all have to say about it. 

Couple of pluses, 
Seems to be a very good seal 
Don't need to worry about putting the heat tubing on before the 
connection. 

Minuses 
I guess you have to used their butt connectors (not really) 
Mold release also 
Might be hard in a tight spot. 

Do you think it's a normal glue gun?  I have a nice cordless one I would 
rather use. 

Thanks again 
Moose_______________________________________________ 

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