Scotch Weld Black for Carbon?

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  • HyProBuildV1
    PropzBro
    • Nov 2014
    • 10

    #1

    Scotch Weld Black for Carbon?

    Anyone using this to mount carbon fiber motor mounts? What is everyone using for the twin cf mounts in these cats?
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    HyProBuildV1/Facebook
  • srislash
    Not there yet
    • Mar 2011
    • 7673

    #2
    That is interesting. I have been just using a good 24hr epoxy by System Three. On the current build I added cloth support on the corners of mounts but this is the first I have done this on. The others have held up fine with no broken mounts even after the flips at 70 or so MPH

    This stuff should work fine. Except for the 20 minute work time.

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    • HyProBuildV1
      PropzBro
      • Nov 2014
      • 10

      #3
      I have used JB on a few mounts on hydro's, an never had an issue...But It can be difficult to use sometimes...in the "Neat" department.
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      • Chilli
        Fast Electric Addict!
        • Jan 2008
        • 3070

        #4
        JB weld has worked very well for me in my CF mounts. Even on my SAW boats that have had numerous blow overs at 90. Scuff the CG good with some 120 grit and wipe clean with alcohol. For clean lines, throw down some masking tape before applying. Apply the JB and your mount, run your finger down the bead if necessary to make a nice fillet and then remove the masking tape. The JB will sag a bit but you will have a nice clean install.

        But to tell you the truth, I've never seen any epoxy fail that wasn't attributed to lousey surface prep.
        Attached Files
        Mike Chirillo
        www.capitolrcmodelboats.com

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        • HyProBuildV1
          PropzBro
          • Nov 2014
          • 10

          #5
          Originally posted by Chilli
          JB weld has worked very well for me in my CF mounts. Even on my SAW boats that have had numerous blow overs at 90. Scuff the CG good with some 120 grit and wipe clean with alcohol. For clean lines, throw down some masking tape before applying. Apply the JB and your mount, run your finger down the bead if necessary to make a nice fillet and then remove the masking tape. The JB will sag a bit but you will have a nice clean install.

          But to tell you the truth, I've never seen any epoxy fail that wasn't attributed to lousey surface prep.
          I'll agree with that. I have used JB weld on every boat I have had, but I was just curious as to what others are using, JB mixes well to a grey color, Most of the twin cats I have seen, after cure, its a nice gloss black..Just trying to figure out what they were using. No biggy Though.
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          • kevinpratt823
            Fast Electric Addict!
            • Aug 2012
            • 1361

            #6
            I have been hearing of this "G/Flex" epoxy on a few build threads lately, it was on my list to research, not sure which version people are using but I'll take a look again.....http://www.westsystem.com/ss/g-flex-epoxy
            My private off road rc track
            https://www.youtube.com/watch?v=XC3H...yaNZNA&index=8

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            • siberianhusky
              Fast Electric Addict!
              • Dec 2009
              • 2187

              #7
              I just mixed up some JB with a pinch of black mortar pigment, certainly made it black!
              The pigment is plain old carbon, anybody think it will effect the epoxy?
              I'll post back later to let you know if/ how it cured and if a can feel any difference in bond using the highly calibrated hand pull test!
              Bonding a couple pieces of fiberglass plate.
              If my boats upside down then who owns the one I thought I was driving the last two laps?

              Comment

              • kevinpratt823
                Fast Electric Addict!
                • Aug 2012
                • 1361

                #8
                Originally posted by siberianhusky
                I just mixed up some JB with a pinch of black mortar pigment, certainly made it black!
                The pigment is plain old carbon, anybody think it will effect the epoxy?
                I'll post back later to let you know if/ how it cured and if a can feel any difference in bond using the highly calibrated hand pull test!
                Bonding a couple pieces of fiberglass plate.
                I have seen in one of Rocstar's builds he used graphite to blacken epoxy, it looked great.
                My private off road rc track
                https://www.youtube.com/watch?v=XC3H...yaNZNA&index=8

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                • Rocstar
                  Joel Mertz
                  • Jun 2012
                  • 1509

                  #9
                  West System G/Flex works great. I use it when I only need a small about like a single motor or servo mount.....easy 50/50 mix.
                  "There's nothing else I really want to do other than get up and build boats." - Mike Fiore

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                  • kevinpratt823
                    Fast Electric Addict!
                    • Aug 2012
                    • 1361

                    #10
                    Originally posted by Rocstar
                    West System G/Flex works great. I use it when I only need a small about like a single motor or servo mount.....easy 50/50 mix.
                    Which blend of G/Flex are you using? And what do you use otherwise if not the G/Flex Joel?
                    My private off road rc track
                    https://www.youtube.com/watch?v=XC3H...yaNZNA&index=8

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                    • Rocstar
                      Joel Mertz
                      • Jun 2012
                      • 1509

                      #11
                      Originally posted by kevinpratt823
                      Which blend of G/Flex are you using? And what do you use otherwise if not the G/Flex Joel?
                      G/Flex 650. I also use West System 105 with 207. I like to control the viscosity with 406 colloidal silica.
                      "There's nothing else I really want to do other than get up and build boats." - Mike Fiore

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                      • flraptor07
                        Fast Electric Addict!
                        • Aug 2013
                        • 2451

                        #12
                        I use 30min. Zpoxy mixed with ground CF for strength and to make it black. Tape the edge and you get a nice finished line when set. Or if you're using with regular Epoxy fiberglass mix it with milled fiberglass to make it white. DSC02678.jpg

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                        • HyProBuildV1
                          PropzBro
                          • Nov 2014
                          • 10

                          #13
                          Lot's of info here, Thanks for the input Guys. Now to decide what to try first...Its not cheap!
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                          HyProBuildV1/Facebook

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                          • dasboata
                            Fast Electric Addict!
                            • Dec 2010
                            • 3152

                            #14
                            Originally posted by Chilli
                            JB weld has worked very well for me in my CF mounts. Even on my SAW boats that have had numerous blow overs at 90. Scuff the CG good with some 120 grit and wipe clean with alcohol. For clean lines, throw down some masking tape before applying. Apply the JB and your mount, run your finger down the bead if necessary to make a nice fillet and then remove the masking tape. The JB will sag a bit but you will have a nice clean install.

                            But to tell you the truth, I've never seen any epoxy fail that wasn't attributed to lousey surface prep.
                            I use JB weld never had a problem and you can heat it to remove it. Mike no cooling can ?

                            Comment

                            • rickwess
                              Senior Member
                              • Apr 2013
                              • 777

                              #15
                              Epoxy pigment works great with G/Flex. You substitute it by weight for the resin. For black I've found that just a VERY VERY small amount is all you need.

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