what color RTV for gaskets... which ones dont eat up the metal

Discussion in 'The Garage' started by jjlaughner, Aug 22, 2004.

  1. jjlaughner

    jjlaughner 3/4 ton status

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    what color RTV for gaskets... which ones dont eat up the metal

    I have a brush on gasket maker from John Deere I use when I have a gasket of some type. I'm thinking for the diff covers laying a bead around the bolt holes and then a wide bead between the holes and letting it setup over night before installing. Anyone done this? /forums/images/graemlins/ears.gif
     
  2. fr8train

    fr8train 1/2 ton status

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    I am starting to use the Ultra-black stuff. Really just ran out of the regular gasketmaker tube sometime last year. Havent had anything eating up metal /forums/images/graemlins/thinking.gif .... have been using it to seal my oilpans and valve covers with no ill effects on the engines or ECM/sensor mumbo-jumbo.
     
  3. heavy4x4

    heavy4x4 1/2 ton status

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    Use blue RTV on diff covers. Make a circle around all the bolt holes and then connect them like you said. But, only let the blue RTV set up for around 10-15 minutes...definitely not over night.
     
  4. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    i used to like the blue, but after i took my hubs off and the PO used it instead of an oring and it ate up the metal, i don't use it very much anymore

    im starting to like the black stuff though.
     
  5. Storm Trooper

    Storm Trooper 1/2 ton status GMOTM Winner

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    Check out Permatex Good Stuff, it works really good.
     
  6. ben427

    ben427 1/2 ton status

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    You mean The Right Stuff?? yeah that is the shiznit.
     
  7. beater74

    beater74 1/2 ton status

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    [ QUOTE ]
    You mean The Right Stuff?? yeah that is the shiznit.



    [/ QUOTE ]

    agreed /forums/images/graemlins/thumb.gif
     
  8. tree_entz

    tree_entz 1/2 ton status

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    I've been told the black stuff is the most resistant to oil.
    (seal failure due to oil contact/ dirty surface when making seal, or general breakdown over time).

    could someone please explain the blue rtv breaking down metal???? it's just silicone based right??? /forums/images/graemlins/thinking.gif
     
  9. jjlaughner

    jjlaughner 3/4 ton status

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    yeah but the silicon contains salt or acids and it pits the sealing surface. I usually use red for everything mainly because thats usually what I have. Never really had any problems with it either. I just couldn't remember which was which. Looks like the blue stuff is the one I want to avoid. I think I have a black RTV and some red left if its not dried up.

    What about the copper RTV is that for mainly intakes or hot areas?
     
  10. Hossbaby50

    Hossbaby50 3/4 ton status

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    I have started using Ultra Grey. Seems to work well. I usually use Ultra Black for Diff covers, Ultra copper for everything else. Blue I use mostly for water pumps, tstats, etc.

    I used Ultra Grey for my tcase reseal because Ultra copper got eaten by ATF.

    Harley
     
  11. jjlaughner

    jjlaughner 3/4 ton status

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    went to the the permatex site...

    [ QUOTE ]
    Permatex® the Right Stuff® Gasket Maker

    --------------------------------------------------------------------------------
    Return equipment to service immediately when you make leakproof gaskets in just one minute with the Right Stuff.® This latest elastomeric rubber gasket technology is blowout resistant and outperforms pre-cut gaskets. Specified on production lines by GM, Ford, Daimler-Chrysler and Mercedes-Benz. Temperature range -75°F to 450°F; (-60°C to 232°C) continuous, 500°F (260°C) intermittent; resists ATF, coolant, oil and other shop fluids. Protects against leaks caused by vibration and thermal expansion. Sensor-safe.

    Suggested Applications:
    Automotive and marine gaskets, valve covers, gearbox covers, pumps, compressors, oil pans, thermostat housings, water pumps

    [/ QUOTE ]

    [ QUOTE ]
    PERMATEX® ULTRA BLACK® Gasket Maker

    --------------------------------------------------------------------------------
    For dealership warranty requirements, insures extended drivetrain warranties compliance. Fast-curing formula. Sensor-safe, low odor, non-corrosive. Meets performance specs of OE silicone gaskets. Retains high flexibility, oil resistance properties through use of a patented adhesion system. Temperature range -75°F to 625°F intermittent; resists auto and shop fluids and vibration. Also available in AUTOMATIC TUBE® dispenser.

    Suggested Applications:
    Valve covers, oil pans, intake manifold end seals, timing covers, transmission pans

    [/ QUOTE ]

    [ QUOTE ]
    PERMATEX® ULTRA GREY® Gasket Maker

    --------------------------------------------------------------------------------
    Designed for high torque applications (predominantly Japanese designs) requiring a unique RTV gasket. Exceeds manufacturers’ performance requirements. Low odor, non-corrosive. Outstanding oil resistance. Guaranteed not to leak. Temperature range -75°F to 625°F intermittent; resists auto and shop fluids and vibration.

    Suggested Applications:
    Valve covers, oil pans, intake manifold end seals, timing covers, water pumps, thermostat housings

    [/ QUOTE ]

    [ QUOTE ]

    PERMATEX® ULTRA COPPER® Hi-Temp RTV Silicone Gasket Maker

    --------------------------------------------------------------------------------
    For 4-cylinder, turbocharged or high-performance engines. The most advanced, high temperature RTV silicone gasket available. Sensor-safe, low odor, non-corrosive. Superior adhesion. Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets. Temperature range -75°F to 700°F intermittent; resists auto and shop fluids and vibration.

    Suggested Applications:
    Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings

    [/ QUOTE ]

    [ QUOTE ]
    PERMATEX® Sensor Safe Blue RTV Silicone Gasket Maker

    --------------------------------------------------------------------------------
    The original Blue. Will not foul oxygen sensors. Replaces almost any cut gasket. Makes reliable "formed-in-place" gaskets that resist cracking, shrinking and migrating. Coats pre-cut gaskets to increase reliability. Temperature range -65°F to 500°F intermittent; resists auto and shop fluids. First generation 1970-1980 gasket maker. Also available in AUTOMATIC TUBE® dispenser.

    Suggested Applications:
    Valve covers, oil pans, timing covers, water pumps, thermostat housings, transmission pans

    [/ QUOTE ]

    [ QUOTE ]
    PERMATEX® ULTRA BLUE® No Leak RTV Silicone Gasket Maker

    --------------------------------------------------------------------------------
    PERMATEX® Ultra silicones were developed to meet today’s technology changes. Sensor-safe, low odor, non-corrosive. Outstanding oil resistance and joint movement values. Eight times more flexible than cork/composite gaskets; three times more oil resistant than conventional silicones. Temper-ature range -75°F to 500°F intermittent; resists auto and shop fluids and vibration.

    Suggested Applications:
    Valve covers, oil pans, timing covers, transmission pans, differential covers

    [/ QUOTE ]


    /forums/images/graemlins/thinking.gif none of these say avoid such and such metals
    Doesn't even list the red type
     
  12. MTBLAZER89

    MTBLAZER89 3/4 ton status Premium Member GMOTM Winner

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    [ QUOTE ]
    I used Ultra Grey for my tcase reseal because Ultra copper got eaten by ATF

    [/ QUOTE ]

    HMMMM /forums/images/graemlins/thinking.gif I've been using ultra copper on everything for about a year now including my tranny pan and t-case adaptor. Haven't had any issues yet /forums/images/graemlins/dunno.gif
     
  13. diesel4me

    diesel4me 1 ton status Premium Member

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    I noticed the regular blue stuff doesnt say "non corrossive"in the listing --while the others did,this leads me to beleive the"non corrosive" ones wont eat the metal.I know of one person who used the regular blue silicone to seal his leaky windsheild a few years ago--now you can put your hand in the holes in the cab where he sealed it!. /forums/images/graemlins/yikes.gifI guess the vinegar they warn you about on the package makes a good acid that will eat the metal after time--probably not much of an issue if its drowned in oil all the time,like a valve cover though. /forums/images/graemlins/crazy.gif
     

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