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  1. #11
    Super Member kenmac's Avatar
    Join Date
    Feb 2005
    Posts
    5,850
    Location
    The Heart of Dixie
    Tractor
    yanmar 3110D

    Default Re: Loctite Blue Silicone RTV Sealant

    Quote Originally Posted by 2manytoyz View Post
    How many have used this with good results? I need to replace waterpump on my JD X475 and wanting a good gasket maker.

    Have used the high temp for years for gasket making. Intakes, water pumps ,oil pans, trans pans,Etc.Works great. I like it
    Yanmar 3110D
    07 Dodge 2500 5.9 Cummins
    Husky 372xp
    Husky 55 Rancher
    Maruyama trimmer
    Husky trimmer
    Redmax BP blower
    Toro zero turn
    North Star 4 K PSI pressure washer
    Honda 300 4 trax
    Yamaha Timberwolf
    liquid logic coupe kayak
    16' Tow Master Dump Trailer ,20' Yanmar Hauler

  2. #12
    Gold Member
    Join Date
    Dec 2010
    Posts
    354
    Location
    Central Pa
    Tractor
    NH Boomer 1025

    Default Re: Loctite Blue Silicone RTV Sealant

    Quote Originally Posted by RickB View Post
    I have 16 years as a professional mechanic and I never use RTV. I disagree completely with you about HiTack. Doesn't really matter. We all have our preferences.
    Yep, Ive been around heavy stuff for 35 years, everybody likes something different. I'm old school I guess, I like #2 permatex. Works on bolts & gaskets, comes off with brake clean.

  3. #13
    Silver Member
    Join Date
    Dec 2005
    Posts
    226
    Location
    SE PA
    Tractor
    bx1500

    Default Re: Loctite Blue Silicone RTV Sealant

    Did the original pump have a gasket? If the pump was sealed with a gasket, that's all I would use. If it did not, I also have used the right stuff black silicone for years with no problems. I trust it to work if applied correctly. Either way, clean all surfaces before using your sealer of choice. I tend to use the copper high temp for exhaust problem areas but I guess it would work on a pump. It would not be my first choice though. I have not used the blue Loctite sealer but it would probably be fine too.

  4. #14
    Member 2manytoyz's Avatar
    Join Date
    Sep 2010
    Posts
    27
    Location
    Atwood, Ill.
    Tractor
    John Deere X475

    Default Re: Loctite Blue Silicone RTV Sealant

    No original gasket. Was going to get some of the original silicone sealer from JD dealer. After talking to local JD mechanic, he had used the 'Red' Loctite on pumps and complete rebuilds without a complaint yet.

  5. #15
    Super Member Scooby074's Avatar
    Join Date
    Aug 2006
    Posts
    6,090
    Location
    Nova Scotia
    Tractor
    BX 25, ZD 326

    Default Re: Loctite Blue Silicone RTV Sealant

    Quote Originally Posted by 2manytoyz View Post
    No original gasket. Was going to get some of the original silicone sealer from JD dealer. After talking to local JD mechanic, he had used the 'Red' Loctite on pumps and complete rebuilds without a complaint yet.
    I dont think its RED loctite as in the threadlocker. Id bet its 518. Its what id recommend and what i used as a mechanic for machined mating surfaces. I didnt post it before because its kind of hard to get. It will only gap fill a few thousandths, so unless its a true machined surface, it may leak

  6. #16
    Gold Member
    Join Date
    Nov 2011
    Posts
    437
    Location
    Enid, OK
    Tractor
    2012 John Deere 3720 eHydro

    Default Re: Loctite Blue Silicone RTV Sealant

    I had a motorcycle engine that died when someone used blue to replace a gasket and filled a passageway for oil to the head blocking the oil supply to the exhaust rocker.

  7. #17
    Elite Member Mace Canute's Avatar
    Join Date
    Nov 2006
    Posts
    4,655
    Location
    Saskatoon, Saskatchewan

    Default Re: Loctite Blue Silicone RTV Sealant

    Ok guys...what would be the correct RTV stuff to use on carburetors? (I've seen it done!)

  8. #18
    Member
    Join Date
    Jun 2011
    Posts
    42
    Location
    West Central Illinois
    Tractor
    Mitsubishi MT2501D

    Default Re: Loctite Blue Silicone RTV Sealant

    Hello All,

    I used this stuff "McKanica" to reassamble my little Mitsubishi tractor. Less than a $1 per tube/bottle for the 'powered' 6.7 oz size! I'll never buy another gasket ,,
    I just bought a case box of it. 16 tubes. You end up throwing more of this stuff away than you use,usually . After your project is done,the stuff doesnt have much shelf life once opened, I have found. No leaks on any hydro parts, read end parts using this stuff! , FWIW.

    McKanica~Gasket Maker~Silicone Sealant~6.7oz~BLUE~#0304 | eBay


    Take Care,
    Barry

  9. #19
    Super Member kenmac's Avatar
    Join Date
    Feb 2005
    Posts
    5,850
    Location
    The Heart of Dixie
    Tractor
    yanmar 3110D

    Default Re: Loctite Blue Silicone RTV Sealant

    Quote Originally Posted by Mace Canute View Post
    Ok guys...what would be the correct RTV stuff to use on carburetors? (I've seen it done!)

    RTV gaskets of course. On my yamaha water craft. Yamaha bond was used for engine sealant
    Yanmar 3110D
    07 Dodge 2500 5.9 Cummins
    Husky 372xp
    Husky 55 Rancher
    Maruyama trimmer
    Husky trimmer
    Redmax BP blower
    Toro zero turn
    North Star 4 K PSI pressure washer
    Honda 300 4 trax
    Yamaha Timberwolf
    liquid logic coupe kayak
    16' Tow Master Dump Trailer ,20' Yanmar Hauler

  10. #20
    Member 2manytoyz's Avatar
    Join Date
    Sep 2010
    Posts
    27
    Location
    Atwood, Ill.
    Tractor
    John Deere X475

    Default Re: Loctite Blue Silicone RTV Sealant

    Put pump back together this morning. Used the red RTV sealer. Been a long time since I had used any RTV. Instructions on tube said to mate surfaces together immediatly and putting in bolts just enough for the silicone to ooze out. Wait an hr. then tighten. Letting it set overnight then add the coolant tomorrow, fire it up and look for leaks hoping to find none
    John Deeres Of My Past

    318, 345, L130

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