Home Forum Ask A Member ThreeBond Products

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  • #296452
    LARRY CATON
    Participant

      US Member

      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

      #296455
      crosbyman
      Participant

        Canada Member

        would  permatex aviation sealer  work  ?

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

        Joining AOMCI has priviledges 🙂

        #296456
        Bob Wight
        Participant

          US Member

          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."

          2 users thanked author for this post.
          #296469
          labrador-guy
          Participant

            US Member

            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.

            I am with bob on this post.  Those new silicone base sealers are great!  The bigger the glob the better the job?  Not!

            dale

            #296504
            fifty20ne
            Participant

              US MEMBER PAY BY CHECK

              IMG_1608

              IMG_1609

              Most snowmobile guys use Threebond

              On crankcase halves “Good Stuff!”

              and recommended by John at

              Nutters Speed Shop.

               

              https://youtu.be/Q6OOup4vEqM?si=7qi3Ap33seRNS-dU

              #296507
              fifty20ne
              Participant

                US MEMBER PAY BY CHECK

                IMG_1608-1

                IMG_1609-1

                Most snowmobile guys use Threebond

                On crankcase halves “Good Stuff!”

                and recommended by John at

                Nutters Speed Shop.

                 

                https://youtu.be/Q6OOup4vEqM?si=7qi3Ap33seRNS-dU

                1 user thanked author for this post.
                #296842
                LARRY CATON
                Participant

                  US Member

                  I’ll try the Permatex anaerobic sealer next time I split open one of the Johnson CD crankcases.

                  I used the Ultra Black on a spaghetti seal gearcase.  It worked well and was easy to apply.

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

                  #296844
                  LARRY CATON
                  Participant

                    US Member

                    Thanks Bob,

                    I’m new to the game and haven’t used most of these products.  When I was a teen in the 70s the Indian Head gasket sealer was the only thing I used regularly for automotive gaskets.  Then they came out with the RTV silicone products.  I don’t know if I did something wrong, but back then I used the RTV on oil pans and valve covers with mixed results.  Now, there’s a huge variety of RTV products and I had lots of success with them when I owned a 1972, 120 Hp OMC sterndrive.  The high heat version worked well on the exhaust manifold gasket and saved me a trip to the machine shop.

                    I saw on the Three Bond website that they too have an anaerobic sealer that’s intended for metal to metal flanges. I thought the sales rep would’ve steered me that way but he ghosted me.

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

                    #296846
                    LARRY CATON
                    Participant

                      US Member

                      In the snowmobile video they used Three Bond 12-11.  It’s an RTV that from the datasheet (attached) seems capable of forming thin films with good performance in the applicable temperature range, chemical resistance, and blow out pressure.

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

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