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JB weld question

MVP
I have never used JB weld before and read the thread a few weeks ago about how well it has been for some of you guys.

My question is, I have to bond a part where the mating surfaces have 0 tolerance. Does JB weld need a certain thikness to work right or is a zero tolerance mate up clamped together until the JB weld sets going to hold?
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Comments

9 comments

Date Votes
  • spryor
    Much will depend on what the material is, how porous, etc. If possible
    I'd also put some around the outside circumferance also, just extra
    reinforcement.
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  • MVP
    For Cosmetic reasons I can't do that.

    I guess I could drill a few small shallow holes into the surfaces to be bonded so the JB will have more to bond to.
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  • dcon12
    That's the problem with America today, zero tolerance. Don
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  • catpealer111
    I know a school bus mechanic that uses JB Weld to repair cracked plastic radiator tanks, and it holds.
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  • goldeneagle76
    I've used it a little before and it held ok...pretty sure it was non-pourous plastic I used it on.
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  • GuvamintCheese
    No tolerance= no JB weld. You would be better off using a thin coat of super glue with zero tolerance..JB is not the end all and what ive seen, its main enemy is torque. cross drill whatever you are gluing and let the weld seep thru to the other side to give it some meat.
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  • MVP
    Yes, drilling makes sense.
    Thats what I was thinking when I replied above about small holes drillinto the mating surface so when the JB sets up it will be like little dowel pins.
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  • shoff14
    why not just use a little dowel pin?
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  • Old Fool
    Devcon liquid steel is much better. Brownell's has it.
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