Put putty under outer edge of faucet base and fasten to sink. Remove excess putty after fastening faucet.
It sounds like you are installing a new faucet. If that is the case read the manufacturer's instructions. If you are re-installing an older faucet, using the plumbers putty doesn't hurt.
No. Use the putty.
You can use silicone as a substitute, but plumbers putty is simpler and far easier to clean up. 100% SILICONE
Oils from putty soak into and discolor marble. Putty not used when putting pipe together.
No, plumber's putty should not be used on marble surfaces as it can potentially stain or damage the marble. It is recommended to use silicone caulk specifically designed for marble or other sensitive surfaces when installing faucets in marble sinks or counter-tops.
You use plumbers grease (non-toxic)
Yes, plumbers putty typically needs to dry before it can effectively seal pipes.
Plumbers putty can be used to seal a leaky pipe by applying it around the area where the leak is occurring. The putty creates a watertight seal that helps prevent water from leaking out of the pipe.
The cure time for plumber's putty is typically around 24 hours.
Plumbers putty is a soft, pliable substance used to create watertight seals around plumbing fixtures. It is commonly used to seal joints and connections in sinks, drains, and faucets. Plumbers putty helps prevent leaks and provides a secure seal that can easily be removed if needed.
The recommended dry time for plumber's putty is typically around 24 hours before it is fully set and ready for use.
Normally you would use Plumber's Putty to seal the faucet to the sink. Some man made sinks can absorb the oil in the putty and darken in which case a bead of silicone caulking would work.