Plumbers Putty on Granite Sink


I recently bought a Pegasus granite sink from Home Depot. I also bought the matching drain made by Watts. The instructions for the drain (which is part plastic) states "DO NOT use an oil base putty - it may cause discoloration". I am assuming this is because of the plastic. But I have also discovered from the labels of several brands of plumbers putty, that it should not be used on marble, granite and other surfaces. This sink is real granite. It is 80% crushed granite and 20% resin. After talking with numerous hardware people, the recommendation was to use caulk. I used DAP Kitchen and Bath Adhesive Caulk and let it sit for two days before using the sink. The caulk is not working and my sink is leaking. Is there a water based plumbers putty? What else can I use? I am not as concerned about the plastic drain as I am about the granite sink. If there is a sealant that is safe on granite but not on plastic, I will replace the plastic drain with a stainless steel drain.
Bob
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Use 100% Silicon Dale

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yep clear sillycone. some lav po's come with a rubber/foam gasket. PP will make a yellow stain for sure.

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