Thank you for taking time to leave a review. At Sinkology, we take reviews seriously in order to identify service and product opportunities. We have found this standard drain will work with thicker sinks if you remove the plastic washer from around the drain and only use plumbers putty.
Additionally, we have since developed a heavy-duty drain designed for thicker fireclay kitchen sinks. If you need help locating this drain, please contact customerservice@sinkology.com