I keep hearing people say Dirko is fuel resistant - it’s not..

[a. palmer jr.]

I've got two tubes of red sealer, one is Dirko and the other is Permatex. The Permatex is smoother going on than the Dirko, the Dirko has a grainy feeling to it like they put something in it for more strength.

 

[Chevboy0167]

Yeah.... I also noticed it spreads different. I think it is not as stringy/elastic when applied. Hard to describe......

 

[Chevboy0167]

Motoseal MSDS screenshot of composition...

 

[huskihl]

Motoseal never hardens up in the tube either

 

[link]

Given the work involved and the results if the gasket fails I would think that buying the best sealant money can buy is the prudent choice. It's not like you use a lot per gasket.

As long as I can still afford buying my milk (beer), butter and bread.
I always planned to marry a rich lady, but no such thing yet...
So, Loctite 5972 fit your bill?

 

[link]

Alrighty then, that was the equvalent of about 51,80 dollas inclusive postage, hope it doesnt cure in the tube. Thanks for the advice.

I will remember to turn left when I get to Reno...

 

[Smitty Smithsonite]

I use Permatex products on everything. Anaerobic sealer works great on just about everything, as does their version of Hylomar, the expensive blue Euro sealer used by Mercedes, etc., that hardens in the tube after a few months at $30 a tube. Anaerobic cures in the absence of oxygen, and is impervious to every automotive fluid there is. The exposed sealant never hardens. Disassembly and cleanup years later is a breeze, unlike most other RTVs. Bonus - it'll stay good in the tube for YEARS.

http://www.classic-motorcycle-build.com/anaerobic-gasket-sealer-review.html
It appears they stopped making that version that looked like a copy of Hylomar, but this is what popped up on their site with a search: https://www.permatex.com/products/g...ex-ultra-rubber-gasket-sealant-dressing-1-oz/

I've tried 'em all over 35 years, and these 2 are the best there is. The anaerobic sealer is the only thing that holds up to synthetic gear oil in automotive rear ends forever. RTVs leak after a few months of synthetic gear lube exposure. EVERY one of them.

 

[Joseph Acquisto]

I use Permatex products on everything. Anaerobic sealer works great on just about everything, as does their version of Hylomar, the expensive blue Euro sealer used by Mercedes, etc., that hardens in the tube after a few months at $30 a tube. Anaerobic cures in the absence of oxygen, and is impervious to every automotive fluid there is. The exposed sealant never hardens. Disassembly and cleanup years later is a breeze, unlike most other RTVs. Bonus - it'll stay good in the tube for YEARS.

http://www.classic-motorcycle-build.com/anaerobic-gasket-sealer-review.html
It appears they stopped making that version that looked like a copy of Hylomar, but this is what popped up on their site with a search: https://www.permatex.com/products/g...ex-ultra-rubber-gasket-sealant-dressing-1-oz/

I've tried 'em all over 35 years, and these 2 are the best there is. The anaerobic sealer is the only thing that holds up to synthetic gear oil in automotive rear ends forever. RTVs leak after a few months of synthetic gear lube exposure. EVERY one of them.

I've always wondered how those anaerobic sealer do NOT harden in the tube, since they say it cures in the absence of oxygen. Vent holes in the tubes?

 

[Blackbruin]

Thanks Frank,, That's good to know..What will seal a leaking carb bowl when you can't find the exact gasket to replace it..?

Aviation gasket maker

 

[Smitty Smithsonite]

I've always wondered how those anaerobic sealer do NOT harden in the tube, since they say it cures in the absence of oxygen. Vent holes in the tubes?

When they pump it in to the tube, a little air inevitably gets mixed in with it, since it's not done in a vacuum. When you clamp 2 parts together, it squeezes out whatever air may be trapped in it, and around it.

Here's the Permatex version of Hylomar that I couldn't remember the name of. Permashield. Thought they might have stopped making it, but I found it here now that I remembered the name: https://www.oreillyauto.com/detail/...gasket-dressing-and-flange-sealant/perw/85420
I use this stuff on anything in direct contact with gasoline, and it works great.

 

[Alanmurphy6912]

you wont beat car windscreen bonding sealer for solvent resistance

What windshield bonder? Like the black windshield glue ?

 

[Alanmurphy6912]

Aviation gasket maker

Where do ou get aviation gasket maker? I've always used motoseal by permatex because that's about all I've had access to for the fuel resistance anyway. I'm open to new sealants tho!

 

[Alanmurphy6912]

When they pump it in to the tube, a little air inevitably gets mixed in with it, since it's not done in a vacuum. When you clamp 2 parts together, it squeezes out whatever air may be trapped in it, and around it.

Here's the Permatex version of Hylomar that I couldn't remember the name of. Permashield. Thought they might have stopped making it, but I found it here now that I remembered the name: https://www.oreillyauto.com/detail/...gasket-dressing-and-flange-sealant/perw/85420
I use this stuff on anything in direct contact with gasoline, and it works great.

View attachment 967173

Is this better than motoseal? Is it thicker than motoseal?

 

[Canyon Angler]

Where do ou get aviation gasket maker?

https://www.amazon.com/Permatex-80019-Aviation-Gasket-Sealant/
Or just google "Permatex 80019"

It's more of a gasket sealer than a "gasket maker," but would probably work fine for a fuel bowl. But as said before, no gasohol.

 

[grizz55chev]

Where do ou get aviation gasket maker? I've always used motoseal by permatex because that's about all I've had access to for the fuel resistance anyway. I'm open to new sealants tho!

Permanent makes a product called the Right Stuff, works for me.

 

[frank_]

What windshield bonder? Like the black windshield glue ?

PU stuff that goes in a gun, i guarantee it will go off when you open it tho
tried smothering it in duct tape and plastic, but it always cured solid in the tube

 

[Canyon Angler]

PU stuff that goes in a gun, i guarantee it will go off when you open it tho
tried smothering it in duct tape and plastic, but it always cured solid in the tube

I use a fair amount of 3M 5200 Marine Adhesive Sealer (another polyurethane product) and have found that if you jam a nail into the spout of the tube, then wrap it in a few plastic grocery bags and put it into the freezer, it will last for several months.

 

[a. palmer jr.]

Where do ou get aviation gasket maker? I've always used motoseal by permatex because that's about all I've had access to for the fuel resistance anyway. I'm open to new sealants tho!

I think I bought mine a NAPA. It's been a long time ago. It lasts a long time if you put the lid on it tightly.

 

[jellyroll]

I use Permatex No# 1,2,3 for everything i work on.

 

[KASH]

Coat the tip of the tube with a dab of grease and put the cap on.When you are ready to use wipe the grease or Vaseline off good to go.I use this with caulking guns all the time.
Kash