Spray Coppercoat Gasket Sealer?

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This add describes Yamabond as semi setting.

But then goes on to describe it as silicone based, and ’sets like rubber in 60 min’.

Kinda sounds like silicone to me…


This add describes Yamabond as semi setting.

But then goes on to describe it as silicone based, and ’sets like rubber in 60 min’.

Kinda sounds like silicone to me…

"Forms a semi-setting rubber like compound that is resistant to oil, gasoline and water."
That does sound like silicone.

Glen
 

BERT

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It's on par with horse wormer.
Glen, don't be opening a can of worms with this thread(just kidding), 1211 is the same colour as horse wormer, too bad they don't invent another sealant the same colour as what comes out the other end of a horse, because they have pretty well have run out of every other combination of applications, etc. only to get a guy to end up with 5 or 6 partial tubes of hardened useless tubes of stuff wondering if the first one was any better than the last one, but how else are those companies going to stay in business if they come up with 1 or 2 products that suffice.
 
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Dan1950

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Yes it is silicone, that is why I linked it. I have talked with folks who say they would never use silicone, but they use Yamabond, Threebond etc.
I've never used the stuff, but all of the descriptions of those sealers state they are silicone of one form or another. This was news to me as well.


Glen
The problem with silicone as I see it is the excess that squeezes out thus the potential for oil passage blockage. It would be interesting if someone would develop a silicone sealant spray. Spray on a light coat, let it cure and then apply the parts. No squeeze out that way.
 

concours

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This, right here. ThreeBond is the Japanese made sealant marketed as Yamabond, Suzukibond, Hondabond. NOT silicone, but the best shit ever for sealing cases. We use in million dollar machine tool gearboxes to seal oil/coolant.
4BA6BEB6-67C2-4131-88A9-5D16CFD73C48.png
 

RatedSpeed

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The problem with silicone as I see it is the excess that squeezes out thus the potential for oil passage blockage. It would be interesting if someone would develop a silicone sealant spray. Spray on a light coat, let it cure and then apply the parts. No squeeze out that way.
Anyone who wrenched through the 70's has to remember the horrors from permatex blue
" Blue Goo" that crap had its "squeeze out" strands clogging oil passages, pump screens, have even seen strands wrapped in oil pump gears.

Yamabond can get confusing, I think they may be up to yamabond 6 now and the formulations are different. I had mentioned yamabond white and grey which may be difficult to find today but that was the elastomeric form that worked so well.
It was developed for 2 stroke cases that had to deal with gasoline constantly, but as silicone technology advanced and was able to tolerate gasoline better yamabond moved to these products. I believe this is why permatex developed motoseal, to capture the market that yamabond left behind.
 
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This, right here. ThreeBond is the Japanese made sealant marketed as Yamabond, Suzukibond, Hondabond. NOT silicone, but the best shit ever for sealing cases. We use in million dollar machine tool gearboxes to seal oil/coolant. View attachment 82975
Someone needs to tell the folks at Fortnine that it isn't silicone they are selling.



 

baz

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Anyone who wrenched through the 70's has to remember the horrors from permatex blue
" Blue Goo" that crap had its "squeeze out" strands clogging oil passages, pump screens, have even seen strands wrapped in oil pump gears.

Yamabond can get confusing, I think they may be up to yamabond 6 now and the formulations are different. I had mentioned yamabond white and grey which may be difficult to find today but that was the elastomeric form that worked so well.
It was developed for 2 stroke cases that had to deal with gasoline constantly, but as silicone technology advanced and was able to tolerate gasoline better yamabond moved to these products. I believe this is why permatex developed motoseal, to capture the market that yamabond left behind.
I'm assuming the "blue goo" you refer to is the same as the blue Hyalomma we have in the UK
This stuff falls away in strands and runs around the engine
I once bought an xs1100 yam that'd had many owners I'm guessing all of them used that stuff because I managed to blow it up in style
It seized a rod then threw ! punched through the case's cutting my shin
When I dropped the sump to take a look the strainer was completely clogged with the stuff
Plus some strands of bright orange instant gasket for good measure
 

RatedSpeed

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I'm assuming the "blue goo" you refer to is the same as the blue Hyalomma we have in the UK
This stuff falls away in strands and runs around the engine
I once bought an xs1100 yam that'd had many owners I'm guessing all of them used that stuff because I managed to blow it up in style
It seized a rod then threw ! punched through the case's cutting my shin
When I dropped the sump to take a look the strainer was completely clogged with the stuff
Plus some strands of bright orange instant gasket for good measure
I'm not sure, but it sure sounds like the same crap.
In the USA we were introduced to Hylomar by the 80's which was supposed to be the latest and greatest rolls royce approved sealant, but by then loctite had come out with 515 / 518 so I didn't use it much.
 

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"
I'm assuming the "blue goo" you refer to is the same as the blue Hyalomma we have in the UK
This stuff falls away in strands and runs around the engine"

As does silicone sealant "squeeze-out." A non-hardening solvent-based sealant - I like Permatex Moto - is, IMO a better choice.
 

baz

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I'm not saying that the blue Hyalomma doesn't have it's place
But over use in certain areas is really bad practice in my opinion
 

baz

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That'll be me then!!!
Though too mean to squeeze it out like toothpaste.... always used 'sparingly!'
Do you remember back in the day the newly rebuilt it meself engines that were adorned with lines of bright orange instant gasket?:oops: :D :D :D
 
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Do you remember back in the day the newly rebuilt it meself engines that were adorned with lines of bright orange instant gasket?:oops: :D :D :D
Oh yes.... that stuff should've come in 'industrial' sized tubes aka builders mastic, so you could use one of those nifty application guns :)
 
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