Best way to fill crack at base of sink drain?

Best way to fill crack at base of sink drain?

Investor · Chatham County, NC · Member since 2014 · 89 posts · 20 votes
So I re-installed a sink tonight that had a hard-to-remove 30-year old drain on it. I'm adding a new faucet. In order to get the old pipe off, I had to use an oscillating tool/blade. While I was cutting, I made a few tiny sliver cuts in the circle at the base of the drain. I finished the install and ran the water, only to find that the rubber washer above the lock but can not make the seal because of these slivers. The damage seems truly small, so I intend to fill the cracks, let it dry, and carry on. Here's my newbie question: what do I seal it with? Concrete floor patch? Something else? What do you recommend? Picture attached. Thanks in advance for any and all advice!
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Mike ReynoldsPro Member
construction · Nacogdoches, TX · Member since 2011 · 2k+ posts · 1k+ votes
9y

@Patrick M. Dis you use plumbers putty on the top side under the basket strainer? Try that because it needs it anyway. 

http://www.homemadehints.com/how-to-install-kitchen-sink-drain-basket/

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  • Investor · Chatham County, NC · Member since 2014 · 89 posts · 20 votes
    9y
    Struggling to upload photo from BP app. Will try upload again tomorrow. Still interested in your ideas to fill slivers at sink drain base.
  • Kuna, ID · Member since 2016 · 40 posts · 29 votes
    9y
    Hey there, without seeing a picture based off of what I'm imagining I'd see if you can find a clear caulking to cover it. I'm not sure how visible it is but they make caulking for sinks. Hope this helps!
  • Mike ReynoldsPro Member
    construction · Nacogdoches, TX · Member since 2011 · 2k+ posts · 1k+ votes
    9y

    @Patrick M. Dis you use plumbers putty on the top side under the basket strainer? Try that because it needs it anyway. 

    http://www.homemadehints.com/how-to-install-kitchen-sink-drain-basket/

  • Littleton, CO · Member since 2015 · 9 posts · 1 vote
    9y
    depending on how bad it is and what you used to seal it in the first place, I would pull the drain apart and use 100% silicone on top and the underside of the drain assembly. once everything is tight wipe the extra off and you should be good as new.
  • Investor · Chatham County, NC · Member since 2014 · 89 posts · 20 votes
    9y

    Here's the sink.

  • Investor · Chatham County, NC · Member since 2014 · 89 posts · 20 votes
    9y

    The damage to the underside of the sink. You can see the gray plastic of the new drain above. 

  • Investor · Chatham County, NC · Member since 2014 · 89 posts · 20 votes
    9y

    @Daniel Adamik are you recommending filling the cuts above with silicone and then letting it dry smooth, then screwing in the remainder of the drain assembly again?

  • Investor · Chatham County, NC · Member since 2014 · 89 posts · 20 votes
    9y

    @Mike Reynolds I put a bead of silicone under the brushed nickel drain top piece as I put it in the sink, per the manufacturer's instructions on the faucet.

    @Vincent Townsend I added the pictures if that helps!

  • Littleton, CO · Member since 2015 · 9 posts · 1 vote
    9y

    Patrick M, 

    I would just put the silicone under the top portion of the drain assembly, instal unit and put  good a bead of silicon under the sink where the rubber gasket will seat and tighten the nut. Do this while the silicone is wet tgen clean up extra on top for a clean install. 

    Hope this helps. 

  • Contractor · Glen Cove, NY · Member since 2016 · 209 posts · 89 votes
    9y

    Did you use white Teflon tape on the threads before you applied the silicon? Water is very unforgiving. Silicon alone may not be enough. make sur the silicon is dry at least 4 hours before you use drain. longer if possible. Water is very unforgiving and when angry will cry and you will have seepage :-((. Put a paper towel under work and watch for water dripping on towel to make sure it id tight.  

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