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The caulking around my sink has worn/rotted away and I've removed it properly, but I've been looking into what I kind of caulking to use, and there seem to be many different types, so I'm a bit unsure of what to do.

Which type of caulking is used for a kitchen sink (the gap between the kitchen sink and the counter-top? Does anything else need to be applied in addition to the caulking?

MarkE
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You need a 100% silicone clear caulk and since it is near a sink I would get something that is mold resistant.

Silicone for the sink to counter binding and its flexibility with temperature change.

Clear because you don't want to have staining issues down the road. Also if you need to add caulk down the road - clear matches clear.

GE Silicone II

I have used this on almost anything.

DMoore
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For the joint between the counter top and the tiles, you can use any flexible, preferably mold resistant, caulking from your local hardware store.

You should also be able to find it in a color that matches your grout.

For the joint between the sink and the bench, I use a clear, waterproof, flexible one.

Michael Karas
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Jason Pascoe
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As a plumber have always used a bead of plumbers putty that u have rolled in your hands to soften and warm. Not messy and last for life of sink.