Do You Use Plumber's Putty or Silicone under the Escutcheon Deck Plate Rubber Gasket?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by cfipp, Dec 3, 2018.

  1. cfipp

    cfipp Member

    Joined:
    Apr 21, 2007
    Location:
    Florida
    I am getting ready to install a new Moen kitchen faucet. It is a single-handle faucet and I will be using an escutcheon deck plate to hide the left and right holes. The deck plate comes with a rubber gasket. The instructions simply say:
    • Place Deck Plate Gasket onto Deck Plate.
    • Firmly snap Deck Plate Gasket onto Deck Plate.
    • Place Deck Plate on mounting surface and install Faucet Body in hole on sink.
    Do you use a rope of plumber's putty or a bead of silicone under the deck plate rubber gasket? Would that add additional protection for leaking under the sink, or is that a bad idea for some reason?

    Thanks very much!
    Carol
     
  2. cfipp

    cfipp Member

    Joined:
    Apr 21, 2007
    Location:
    Florida
    I referred to the gasket as a "rubber" gasket but I just got it out of its packaging and what a misnomer! That gasket is not rubber nor silicone - - it is just hard plastic with a very, very thin roll/gasket of a spongy neoprene-like material. Almost nothing there to prevent water from running right under the plate and down any of the three holes. (And not only that; you can in no way "firmly snap" the gasket onto the deck plate. It sort of sets into the deck plate grooves but it doesn't remain attached - it slides right off - and it sure doesn't "snap". )

    Here are photos of the gasket and the thin rope of neoprene (or whatever it is):

    IMG_6997.JPG

    IMG_6999.JPG

    IMG_6994.JPG

    IMG_6995.JPG

    So would it be ok to also apply some silicone or plumber's putty under that gasket? My sink is a white enameled cast iron.

    Thanks!
    Carol
     
    Last edited: Dec 4, 2018
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  4. WorthFlorida

    WorthFlorida The wife is still training me.

    Joined:
    Oct 28, 2009
    Occupation:
    Retired
    Location:
    Orlando, Florida
    Plumbers putty will eventually harden and it really wont help here. If you're worried use a little "clear" caulking. Apply a thin bead and after the faucet is tighten down wipe away the excess. You be surprise how much pressure does get applied to these gaskets to seal up. Anything too soft and they'l split apart. The edge of the faucet base is quite sharp. There are millions of these out there and you rarely see these leak any. Just remember that the water is laying there with no pressure.
     
    cfipp likes this.
  5. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    I would. I am not a plumber.
     
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