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Thread: Anaerobic sealer - what is it? where can I get it?

  1. #1
    In for the long haul BigArt's Avatar
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    Winnipeg, MB, Canada
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    Default Anaerobic sealer - what is it? where can I get it?

    I will be doing Heath's cooling upgrade starting Tuesday. Including pulling and cleaning the hell out of the radiator. I will plan on taking a bunch of pics to create some sort of "how to".

    But in the instructions it says to use an "anaerobic sealer". I've googled it and found out that it is a substance that will cure in the absense of air. And I understand what it is used for. Even got a Loctite and a GM part number (Locktite 518 & GM 1052943). I haven't tried the stealer, and am having a heck of a time finding anything off the shelf in the local auto stores. Anyone have any ideas where a Canuck can go to get this stuff? I don't think it's the same as RTV or silicone.

    1995 CHEV SILVERADO K2500HD Ext Cab, long box with cap 6.5 TD F VIN. 3.73 GEARS

    1980 HD FLT

    As of Jan/08 - 360,000 KMs- reman engine long block - new LP - new IP - new turbo - new injectors - new glow plugs - new batteries - new starter - new oil cooler.... MODs spring 2009 - FSD behind front bumper. Air box mod. Turbomaster. Vac pump delete done. Boost, EGT, trans temp guages & 3 guage pillar pod. Superflow 4" complete exhaust. GLE chip. Deep cast trans pan. Heath HO cooling upgrade. Runs superbly like it can and should now. Used daily, and to pull my 30' Dutchmen.

  2. #2
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    I believe "The Right Stuff" is anaerobica. I think that is by Permatex. . I'd recommend "The right stuff" or GM PN from what I have read.
    97 Chev K2500 6.5, 5spd, ext cab, shortbed, ~225K miles, remote FSD(DTech), remote oil filters, boost, EGT, fuel pressure gages, Heath TM, 3" DP 4" Exhaust, Prodigy, B&W Turnover ball, 2" Rear wheel spacers, Sirius, Super Steer Idler, Roadmaster Active Suspension, rear Timbrens.

  3. #3
    Recruit Jasonsmack's Avatar
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    I think the "right stuff" is a urethane based silicone replacement.

    Our local NAPA and Auto Electric stores generally have the anerobic sealants. They are sometimes labeled as gasket maker. I think they were originally formulated to use on modular cases like snowmobiles, subaru's and air cooled vw's. It is unlikely that you will find it at the regular places like canadian tire and parts source.
    1996 GMC K2500HD

    Broken piece of Stay tuned, I will update the sig when it lives.

  4. #4
    Recruit JMJNet's Avatar
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    Google is great.

    Here is a link to Summit:

    summit racing part detail 37394

    Also, Permatex 51813 = Loctite 518

    Here is a pdf of all gasket maker:

    May want to bring it to local store to see if they have either one of those.
    Last edited by CtChevy427; 05-31-2009 at 05:03 PM. Reason: removed non vendor hyperlink
    1995 6.5TD GMC Suburban
    PMD in Bumper
    Leroy Diesel FS PMD
    4" Warpspeed Exhaust
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  5. #5
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    NAPA or most large parts houses will have it(AZ and ADVANCE are more for do it yourselers). It is commonly called gasket maker and it will be a thick red paste. You can also buy it from EVINRUDE as GEL SEAL as it is also used for sealing engine case halves in outboard motors. It is a sealer basically used where tolerances are critical and a silicone can't be used due to torsional flexing of the parts. Manual transmissions commonly use it for the case halves as well. Just remember though to be careful cleaning surfaces that will receive anrobic sealer. They must be flat and clean and pull down tightly together. Otherwise the sealer will not harden as it requires pressure in the absence of air for it to cure.

    1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
    DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.

  6. #6
    Depends on the 6.5 Matt Bachand's Avatar
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    Must be the same stuff you can see 'squishing' out between my T-Case.
    1997 Chevy 3500 4x4 Dual Wheel 6.5 TD 156k (D.S. Head rebuilt at 120k) A great truck that gets BETTER with age
    9' Utility Body w/ Dual Tanks, 9' Fisher Plow / Glowshift Fuel Gauge On Dash
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    Strobes all the way around / IssPro Boost/Pyro Guages on A-Pillar / 0-15psi Fuel Pressure on Pod next to A-Pillar
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    235/85 16's....
    4l80e Rebuilt at 106k (blew reverse out, my fault)
    -1.94 TDCO / Half Assed FTB (Still need to bore out IP fitting) / Switchable TWIN walbro's. (10PSI @ IP)

  7. #7
    6.5 nut job/addict
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    I bought a spray can of special anarobic prep at napa.It is acetone baced cleaner. There cant be any oil or anything else on the surfaces to be sealed.

    I am not on the Heath Bandwagon

  8. #8


    Huh.. I missed that part when I did mine. I used plain old snot. No leaks.
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  9. #9
    Wild Blonde from Cloud Mt Missy Good Wench's Avatar
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    You dont need any of the $$$$$$$$$$$ stuff to do the job right.

    The correct way to do the water pump is to use a gasket (felpro or your fav brand)
    There is a gasket that goes between the water pump back plate and the Timing cover and also one that goes between the back plate and the water pump.

    Use a little High temp silicone on the surfaces to stick the gasket and your good to go.

    Be sure to use a little extra silicone at the water ports. Also place a little silicone on the threads of any bolts that go into the water jacket.

    Easy, simple and no need to spend big Bucks and fool with the anerobic sealer.

    That stuff was marginal anyway.

    1995 GMC 3500 4x4 Crewcab DaHooooley
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  10. #10
    I might be crazy but i ain't dumb chevyCowboy's Avatar
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    i used "the Right stuff" when i did mine and itnaint got a single leak i was told about it by a friend and it is now my favorit sealnt kinda pricey but it works great.
    COWBOYCADILLAC II 2000 CCSRW LB 4.10's w/posi, heart transplant Complete! 599 block, Fluidamper, .030 over, head studs, .01 thicker HG, FTB mod, rebuilt 5521, FRB5 lift pump w/ wicks prefilter, 4inch exahust, bullydog EGT & Boost gauges, custum rear tool box bumper, Dmax tow mirrors,
    and lots more. started life as a CCDRW W/ Flatbed

    COWBOYCADILLAC: RIP 93 K2500 6.5TD 4X4 wrecked at 290000 but the heart lives on in the 00

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