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Release agent for JB Weld?

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  • Release agent for JB Weld?

    I need to make some metal part impressions in a woodworking fixture that will use JB weld as part of the structure, it's lightly loaded so strength is not a problem. What can I use for a releasing agent to prevent the metal parts from being glued to the fixture? I can't find anything locally and ordering online is not an option because I need it now and can't wait on it, any suggestions?


    I tried car wax and it helped but still the parts were stuck fairly tight, the little bit of releasing agent I had left from a gunstock glass bedding kit worked great on the first two parts but there was not nearly enough of it to finish the job.

  • #2
    Vaseline----------------
    Brian Rupnow

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    • #3
      A little late now but I keep a couple of cans of mold release in stock at all times. I use it for my zinc castings but it also works for rubber, silicone and ceramic. And it works for dry lubing. It's a boron compound in a carrier that evaporates in less than a minute. Boron nitride is one of the slickest materials on Earth.

      You might run up to the hardware store and see if they have dry lock lube in a spray can. That would probably work.

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      • #4
        I've pulled out my tube of silicon grease from my fishing kit as well. Sporting goods stores carry it in the fly fishing department. it's used to keep dry flies floating.
        Eric Sanders in Brighton, Michigan
        www.scope-werks.com
        www.compufoil.com

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        • #5
          Originally posted by radkins
          I need to make some metal part impressions in a woodworking fixture that will use JB weld as part of the structure, it's lightly loaded so strength is not a problem. What can I use for a releasing agent to prevent the metal parts from being glued to the fixture? I can't find anything locally and ordering online is not an option because I need it now and can't wait on it, any suggestions?


          I tried car wax and it helped but still the parts were stuck fairly tight, the little bit of releasing agent I had left from a gunstock glass bedding kit worked great on the first two parts but there was not nearly enough of it to finish the job.
          Some people use cooking spray with success. My father in law, a riflesmith of some note, uses Johnson's Past Wax exclusively. I really like the spray on mould release sold by Brownells for use with their AcraGlass products. Very convenient and it's never failed to release as long as I make sure not to allow a mechanical lock by accident.

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          • #6
            A good coat of wax followed by some PAM cooking spray. Works better than one or the other alone IMO.

            The PAM makes for a good (cheap) anti-spatter spray for welding too.

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            • #7
              Now that were on the JB weld topic --- whats a good dissolving agent?

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              • #8
                Polyepoxide (epoxy resin) has one big weakness. Acetone. You can also use flourine gas but I recommend against it.
                Free software for calculating bolt circles and similar: Click Here

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                • #9
                  Kiwi neutral shoe polish. Works great, you can fill holes that might cause an interlock. I bedded my Savage MKII rifle using Kiwi as a release agent a few weeks ago.

                  CLutch

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                  • #10
                    Johnson's Paste Wax

                    Johnson's Paste Wax. Works great with any kind of epoxy.

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                    • #11
                      Thanks, I put this on hold until tomorrow when I can make a trip out to buy something, living out in the boonies like this makes it difficult to just run out to the hardware store. I think the paste wax and shoe polish sounds good because I will need to fill some small voids with whatever I use.


                      Thanks to everyone for the suggestions.

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                      • #12
                        All the suggestions are good. Here's another: Hold the object over a candle and it will soon be covered with carbon soot and a wee bit of unburned candle wax. Be sure to keep the object moving over the flame in order to get uniform coverage.

                        I've not tried it, but an acetylene flame (no oxygen) is sometimes used.

                        JB-Weld, being a bit stiff when it is applied, tends to push away some release agents and bond to the base material, in spite of one's efforts.

                        Orrin
                        So many projects. So little time.

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                        • #13
                          I've used pam while bedding rifles and also while making fiberglass repairs to boats. works great. nothing sticks to pam, ask the cook in the house.

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                          • #14
                            One product I've used many times as a release agent is- skin oil. If I'm laying up a little epoxy job and I want to keep some part from sticking when I know the epoxy is going to go there where I don't want it- I rub my forehead up into the hair line and get a little 'mold release' on my fingers, then apply it by rubbing it on. It does work, maybe not for everything -do your own test.
                            I seldom do anything within the scope of logical reason and calculated cost/benefit, etc- I'm following my passion-

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                            • #15
                              Any wax should work fine.

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