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  1. #1
    Join Date
    Aug 2002

    Does J-B Weld ever go bad...?

    J-B Weld . . . the "duct tape" of epoxy mixes. . . . does it go bad once it is opened? I know that it can dry out if the tube not sealed properly. But will it go bad over time? Does temperature (i. e. freezing) affect its bonding properties?

  2. #2
    Join Date
    May 2000
    Reno, NV
    I would imagine that if it's not stored above 55F it would go bad over time. Just my hunch.
    98.5 2500 QC ISB 4x4, Auto DTT TC & VB, JRE 4" exhaust w/5"Tip,F1 Mach 2's, AirBullDog hood, Smarty, Centramatics, 3rd gen trackbar, DSS, PSC 3Turn box, Rancho 9000 in cab adjust, Mag-Hytec trans&diff covers, EGR rear disc, Mr Bob's Silicone Hose kit

  3. #3
    Join Date
    Jul 2004
    Avocado Capitol, So.Cal.
    I'd be careful with any 2 part glues , especially on critical path items.
    2004.5 LWB 2wd , Volant cold air intake,custom H.I.D.'s w/Fogzilla 15,000 lumens forward lighting, 3" front lift ,Triple Pillar Gauges, Amsoil Dual Remote Bypass, CFM+ Intake. SMARTY JR. Straight piped, Goerend Trans parts

    Good Judgment Comes From Experience

    Experience Comes From Bad Judgment

  4. #4
    Join Date
    Nov 1996
    Meridian, Idaho
    I have been using 2 part epoxy for so many years can't remember how long. I am totally sold on it. I don't use the quick stuff for much of anything. I did use it once to repair a broken horse hoof that had a large chip. I reset the shoe and filled it in with the fast quick stuff. Worked great and kept junk from getting in. I do keep mine from freezing however. dm
    2002, 2500 Quad Cab, SLT Plus, 4WD, 6-speed, 4.10, Grid Heater Oil Switch. Isspro Mechanical Fuel Pressure Gauge, Westach Combo Boost & EGT Gauge, Frantz Oil Bypass System, Edge EZ, Vulcan Big Line Pusher.

  5. #5
    Join Date
    Sep 2004
    West Central Arizona
    Yes, J-B WELD does go bad. Here in the desert SW anything with a solvent or resin in it is short-lived, usually 1 year or less. This is true even if it is kept in a refrigerator, but the cool does extend the shelf life quite a bit. The humidity may get as low as 5%. Fiberglass resin will turn sort of purple. At this stage it won't cure properly so you may as well throw it in the trash. All of the above mentioned problems are with new, never-opened containers. We always buy everything of this nature in small containers to save $$$.

    98.5 Quad Cab 3500 dually; NV4500; 2WD; Full Air Ride; Accuair Controller; 2 on-board air compressors; 13" SouthBend; ATS Exhaust Mani; 5" Exhaust; AFE Pro-Guard 7; FASS Platinum 165; Adrenaline/V2; 100 hp inj.;HE351C; in-line PAC BRAKE

  6. #6
    Join Date
    Jan 2001
    Southern CT
    Does J-B ever go bad. . . ?

    Geez didn't you see the Fox news special? When JB Weld Attacks!

    It does have a "Shelf" Or UOFS (Un Opened Factory Sealed) life. and once opened take it down two thirds. Resins, two part epoxy, and some solvent actuated adheesives loose their "Kick" time when vapor can escape. Ever notice how the grey side of the JB gets chalky? The suspended stuff within has lost it's protection and has in a sense hardened a bit so the actuator (Coppery Brown stuff) cannot make a bond with the grey.

    My A&P instructor had gone into bonding agents for two days sraight once.

    Hot glue, hot melt glue guns, sealants, adhesives, molding products, nordson, cyanoacrylate
    Last edited by ToolManTimTaylor; 09-24-2007 at 12:40 PM.
    2K+1 3500 ..Stock..Nope..Mod List 'n Pics
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