ThreeBond Products

[Sputter]

Does anyone have experience with using a ThreeBond product in place of 3M-847 ?  For example, to seal crankcase halves or hold spaghetti seals in place while assembling gearcases?  https://threebond.com/

I’d never heard of ThreeBond, but saw it mentioned multiple times on motorcycle forums.  Apparently,  Yamaha, Honda, and others have sealants called YamaBond, HondaBond, etc. that folks say are re-branded versions of a ThreeBond sealant.

I contacted ThreeBond by completing a form on their website.  They responded within an hour, but I feel like their Sacramento, CA representative is giving me the runaround.  I asked if they could recommend a product for sealing crankcases, and he replied that they can’t and I should follow OEM recommendations.  I wrote back saying that OMC is out of business, and I need a sealant comparable to 3M-847.  He said that they don’t have a cross reference for 3M-847.  Geeesh!

Finally, I said that I need a low viscosity sealant, resistant to oil and gasoline, suitable for assembling crankcases without a gasket, preferably with an open time of several minutes to allow for positioning and assembly.  I decided to post here while I wait for a response.

 

1956 Johnson 15 Hp, FD-10
1957 Johnson 5.5 Hp, CD-14
1958 Johnson 5.5 Hp, CD-15

[crosbyman]

would  permatex aviation sealer  work  ?

Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant, 4 oz. : Amazon.ca: Automotive

Joining AOMCI has priviledges 🙂

[Bob Wight]

I’ve never used them but Threebond products have been around for a good while and they are commonly used for sealing crankcase halves.   They would work as an outboard crankcase sealer but if it’s a straight metal joint with no spaghetti seal, then I typically use Permatex anaerobic gasket sealer on my OMC motors.    It works great and is a lot easier to use than the sticky, gooey, messy 3M847.    The 847 can be used on crankcase halves that use a spaghetti seal but not a straight metal to metal joint.  I also used Permatex Moto-Seal to seal the crankcase halves on an Evinrude motor – it’s very similar to the Threebond products.

For sealing OMC gear cases, I recommend Permatex Ultra Black.   It’s WAY easier to use than 847 and seals just as well.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

[Author]

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