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john(MI) 
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Joined: 12 Sep 2009
Location: SE MI
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 Topic: Blue Gasket Silicone
Posted: 28 Oct 2020 at 11:11pm |
Is it resistant to gas?
I broke the fuel gauge on my mower where it goes in the tank. I thought I would run a bead of that under the top and stick it in the tank. If it ain't resistant to gas what can I use?
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D14, D17, 5020, 612H, CASE 446
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Dave H
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Joined: 11 Sep 2009
Location: Central IL
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Posted: 29 Oct 2020 at 5:53am |
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without experience in that arena and not having a grip on exactly your application, I would lean to JB Weld before the blue.
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Lars(wi)
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Joined: 14 Sep 2009
Location: Permian Basin
Points: 6640
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Posted: 29 Oct 2020 at 5:59am |
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As long as it’s not submerged in gasoline you may ‘ get by’ with it.
You would have better luck with a product specifically made for constant contact with gasoline.
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I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.
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Kansas99
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Joined: 26 Feb 2015
Location: W Kansas
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Posted: 29 Oct 2020 at 6:22am |
Interesting, I would have said yes it'll work but I looked and didn't realize oil resistance and gas resistance are 2 separate things.
From Permatex web sight John.
Can I use the Permatex® Ultra Blue® RTV to seal a gas gauge-sending unit to a gas tank?
Posted on: February 18th, 2016
No, Ultra Blue® is a silicone-based product, that will
offer a good seal, and has good resistance to oil and coolant, however,
silicones are not recommended for use in a gasoline environment. The
gasoline will attack the product. Permatex® offers the solvent based Form-A-Gasket® products or MotoSeal® #29132 that are designed for applications in a gasoline environment.
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"LET"S GO BRANDON!!"
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Ted J
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Joined: 05 Jul 2010
Location: La Crosse, WI
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Posted: 29 Oct 2020 at 7:47am |
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I didn't know they made such a product. THANKS Kansas! I'm gonna have to get some of that.
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"Allis-Express"
19?? WC / 1941 C / 1952 CA / 1956 WD45 / 1957 WD45 / 1958 D-17
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darrel in ND
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Joined: 22 Nov 2009
Location: Hebron, ND
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Posted: 29 Oct 2020 at 8:55am |
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That's a new one to me, too. Good piece of information to have. Thanks Kansas. Darrel
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john(MI)
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Joined: 12 Sep 2009
Location: SE MI
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Posted: 29 Oct 2020 at 9:04am |
Thank you for the help guys. A wealth of information right here!
Picked some up and put it on. Said it's supposed to be set in 20 minutes so I just left it alone and went and cut up a tree. Next time I use it I'll check it out.
Edited by john(MI) - 29 Oct 2020 at 1:54pm
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D14, D17, 5020, 612H, CASE 446
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Kansas99
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Location: W Kansas
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Posted: 29 Oct 2020 at 10:23am |
The crazy part is that guy in 2016 had the same question as you John. I think in all my searches for answers I've never seen the exact question asked by someone else. 
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Kansas99
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Posted: 29 Oct 2020 at 10:24am |
 Ted J wrote:
I didn't know they made such a product. THANKS Kansas! I'm gonna have to get some of that.
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Yep first time I've ever heard of motoseal too.
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"LET"S GO BRANDON!!"
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Adam Stratton
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Posted: 30 Oct 2020 at 8:33pm |
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There is also a product called Seals-All that is gas resistant I've had decent luck with
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allisrutledge
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Joined: 30 Mar 2010
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Posted: 30 Oct 2020 at 8:39pm |
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I use instant gasket by loktite,
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Allis Chalmers still exist in my mind and barns
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