Blog > How to fit a new kitchen sink strainer waste

I have removed from the Composite kitchen sink the waste disposal unit that was old and broken, the area around the hole was quite clean , no putty or sealant, I am going to replace it with a new sink strainer waste.
When fitting this do I need to use a sealant or will the top and bottom rubber seals be ok when tightened down preventing any leaks,?

Thank you………….

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