Front/rear intake sealant - NCRS Discussion Boards

Front/rear intake sealant

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  • Jack O.
    Very Frequent User
    • July 31, 1996
    • 525
    #1

    Front/rear intake sealant

    I've been told by several people that it's better to use a sealant for the front/rear of the intake rather then using the provided rubber gaskets. If so, what's the best sealant to use? I noticed at a recent Cruise-in a couple of newer engines, GM Perf crate motors, used a grey appearing sealer.
    Thanks,
    Jack
    Jack Ottofaro
    Tags: None
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    • Barry K.
      Expired
      • February 29, 2004
      • 164
      #2
      Re: Front/rear intake sealant

      I use the Permatex Ultra-Copper RTV
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        • Christopher R.
          Extremely Frequent Poster
          • March 31, 1975
          • 1599
          #3
          Re: Front/rear intake sealant

          GM sells a gray colored RTV sealant. Supposed to be great. If it were me, I use a brand named product that was colored something close to the color of the manifold. Gray for aluminum. Ultra copper for Chevy orange. Or a neutral black.
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