JB Weld for bedding?

Discussion in 'Gunsmithing' started by deermaster, Jan 23, 2011.

  1. deermaster

    deermaster Member

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    I have read several articles online where JB Weld is used for bedding actions. Is this something that alot of people do? How would is hold up compared to the epoxy that come sin most bedding kits? Thanks for any info.
     

  2. fj40mojo

    fj40mojo Well-Known Member

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    Devcon is what you use for bedding, similar to JB Weld but I doubt the 2 are exactly the same. I know Devcon sticks better to old oily wood stocks and bonds better with the gel coat on composite stocks too. Use aerosol mold spray release as your release agent.
     

  3. geargrinder

    geargrinder Well-Known Member

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    I've used JB weld quite a bit. It works great, but it is a bit more liquid than Devcon.

    I use Kiwi neutral shoe polish for release agent.
     
  4. Trickymissfit

    Trickymissfit Well-Known Member

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    Before you buy any epoxy compound, go online and check the shrinkage factor. Also find out how hard it is when it cures. Some of the it is almost like rubber when it's done. I use JB Weld for scope bases mostly, and some stuff called MarineTex inside stocks (I also use a couple others). Super Belzonia is better than Devcon in my opinion, and you can add steel or lead shot to it for the recoil lug area. Seems to be a low shrinkage compound as well. I've never used JB Weld for a full bedding, but looks like it would work just fine
    gary
     
  5. Trickymissfit

    Trickymissfit Well-Known Member

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    never tried the shoe polish! But I will. Most manufacturers in industrial useage have their release agents made by Johnson & Johnson, and it virtually the samething as Pledge. I used Pledge for years without a hangup (now that's the pun of the day!). Whatever you use, be sure that the metal is completely dry and at room temps. Solvents will kill all release agents on contact.
    gary
     
  6. J E Custom

    J E Custom Well-Known Member

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    I like the Steel bed from Brownells because it dries slowly(1 to 3 hours depending on
    the temperature) allowing some work time.

    It is thick enough to not be runny and very predictable.

    As it hardens I can remove the excess on the outside without disturbing the bedding.

    I also use paste wax as a release agent .

    This stuff needs 2 or 3 days to harden before firing the rifle.

    There are many other brands of bedding compound, but I like this one.

    I have not tried JB Weld , but have tried others.

    J E CUSTOM
     
  7. Trickymissfit

    Trickymissfit Well-Known Member

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    steel bed is nothing but Super Belzona with steel shot added to it. I've even seen it sent from Brownells with the S.B. lables on the containers. But buy the stuff without it, and then you can add whatever you want to. Now they have even better stuff on the market.
    gary
     
  8. J E Custom

    J E Custom Well-Known Member

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    Is that good or bad ?

    I like it and the stuff last. I have some rifles with Steel Bed at least 10 years old and the fit
    and accuracy is still the same.

    The stuff I get has stainless shorts already added.

    I have never seen the other brand to try it.

    Thanks

    J E CUSTOM
     
  9. Trickymissfit

    Trickymissfit Well-Known Member

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    Orginally Super Belzona was only sold with bronze in it or nothing but epoxy. Then they came out with a steel and even later an aluminum epoxy compound. I probably bought forty pints of the stuff a year, and had a refridgerator full of it. I might add here that the aluminum compound is very good to work with. Hardemans has came out with some epoxy compounds that are better than 98% of the others due to low shrinkage rates (all shrink a little bit). But you better know what and where your going with stuff as it's extremely strong! Devcon came about to help repair machinery, and it was really the first useable one. But others have long passed them by with their epoxys. But Devcon has also came out with an aluminum and a steel epoxy compound. The stuff goes in like putty. You can machine it like normal metals. Has a low shrink rate and is super strong. I used a pint of that stuff a month (aluminum). I did bed a benchrest target rifle with the aluminum putty once, and the results were fantastic
    gary
     
  10. J E Custom

    J E Custom Well-Known Member

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    Thanks Gary !

    I think I will have to try some Devcon.

    Do they make it with Stainless ?

    I used to use the accuglass and I would mix in brass, aluminum and stainless depending on the use
    But I got tired of mixing up my concoction and started using the steel bed.

    Thanks again.
    J E CUSTOM
     
  11. Trickymissfit

    Trickymissfit Well-Known Member

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    I've never seen it, but I also have not been buying it for a little over four years (bought a lot of epoxy compounds when I was working). Interestingly, one thing I found about the Devcon aluminum compound was that it has a very low expansion factor when it's heated up! I can't tell you why or how, but for most of what I was using it for that was critical. Another one that's even better than all the other epoxy bedding compounds is Moglice. This stuff has a shrink factor of .000025", and is extremely stable. The bad side is that it probably will cost close to a hundred dollars for the material alone, and the shelf life is kinda short (ten weeks max). I used it all the time at work, and they'd get rid of it if it was over six weeks old. I dug some vials out of the trash and gave it a try. Nothing comes close except for the red stuff out of Michigan. The shrink factor alone is about 1/10th of what most all the others are. But is also something you don't want to screw up with as it will glue about anything together forever.

    I'll look around to see if they sell a stainless steel epoxy putty in a little bit.
    gary
     
  12. Firecat

    Firecat Well-Known Member

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    1+ for the Kiwi Neutral shoe polish for a release agent. I've done a few and had no problems with hang ups.
     
  13. Trickymissfit

    Trickymissfit Well-Known Member

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    First of all, sorry for not getting back with you last night. Brother inlaw dropped by while I was just starting to hunt the stuff up. Devcon dosn't make a stainless steel putty compound. The do make steel bed and a titanium putty (looks like they may have dropped the aluminum putty compound!) The titanium is about twice the price for a pound of it ($80), but if your shooting a bench gun this weight factor maybe be your saviour. Plus titanium is much more durable than any steel compound. The two part tubs like they are using, if kept in a fridge will last quite awile. While the premixed anarobic stuff has the short life span. I keep all of my epoxy in a fridge, as it seems to last longer.
    gary
     
  14. J E Custom

    J E Custom Well-Known Member

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    That realy sounds good.

    I will try some of it.

    Thanks again.

    J E CUSTOM