How to install sink fastening clips

Written by nathan mcginty
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How to install sink fastening clips
Keep your sink in place with sink fastening clips. (just a sink image by Pix by Marti from

You won't see sink fastening clips anywhere around your sink, but you'll know when they're not doing their job. A wobbly sink can be a dangerous hazard, especially in an area where you might have an electrical circuit. These clips work by hooking into the underside of your sink and gripping to the counter above. Most sink installations use six to eight clips to hold the sink in place. When it's time to remove or replace your old sink, you'll first have to install sink fastening clips so that your sink stays where you want it to.

Skill level:
Moderately Easy

Things you need

  • Silicone caulk
  • Caulk gun
  • Screwdriver

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  1. 1

    Turn the sink upside-down.

  2. 2

    Slide the sink fastening clips into the channels on the underside of the sink. The smaller, T-shaped end of the screw fits into the channel. Do this for all the clips. Rotate them so that the clips on the end are facing toward the centre of the sink. This will keep them out of the way when you're dropping the sink into the counter.

  3. 3

    Insert a tube of silicone caulk into your caulk gun. Trim it off at the 1/4-inch mark. Squeeze the trigger gently and apply a bead along the edge of the underside of the sink.

  4. 4

    Turn the sink back over so that it is right-side up. Place it into the kitchen counter opening.

  5. 5

    Turn the first clip, starting in one corner, so that the fastening end is now underneath the counter. Tighten the clip until it just makes contact with the underside of the counter. Repeat this process for the other clips.

  6. 6

    Tighten the sink clips so that they grip firmly into the countertop. Start with the clips on one side of the sink and then do the other side.

Tips and warnings

  • Wear the appropriate safety equipment when working with silicone caulk.

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