> I am going to install a vanity marble top with sink onto my vanity after
> I take off the old, naturally. I have lots of plumber's putty which i
> know i can use on the faucet drain, but could i also use it as a sealant
> to my vanity?
I'm wanting to clarify a few points here.
Plumber's putty is NORMALLY used to seal between the lip and top of the
counter top on a drop-in sink. I really don't know if the same is true
for undermount sinks, or not.
Yes, most plumbers probably would use silicone caulk as the sealant
under a drop-in kitchen sink, but I won't do that, and haven't in the
21 kitchen sinks in my building. The reason why is that silicone also
works as a good adhesive, and should you ever want to remove that sink
in future, having silicone holding it in place is just gonna make it
more of a fight to remove. And, removing the silicone stuck to the
counter top is very much more difficult than plumber's putty.
So, if it were me, if this is a drop-in sink, I'd definitely use
Someone said that "putty" is simply clay mixed with linseed oil. That
is correct. GLAZING putty, which is used on old windows is nothing more
than linseed oil mixed with clay. Plumber's putty is a different kettle
of fish because it doesn't harden the way glazing putty does. If you
buy a tub of plumber's putty, the surface of it won't get hard when
exposed to air the way glazing putty will. I really don't know the
difference between glazing putty and plumber's putty, but if I had to
guess, my guess would be that unlike the linseed oil used in glazing
putty, plumber's putty uses a semi-drying oil.
Drying oils are those which dry to a solid when exposed to the oxygen in
the air. Such oils include linseed oil, Tung oil, walnut oil, poppyseed
oil, oiticia oil, safflower oil, Tall oil (which is a by-product of the
pulp and paper industry) and some oils derived from fish.
Non-drying oils are those which don't react with oxygen to transform
into a solid at all, and such oils would include crude oil, olive oil,
and palm tree oil.
However, there are also "semi-drying" oils with transform from a liquid
to a stiff liquid when exposed to the oxygen in the air, and such oils
would include soy bean oil.
My guess, and it's only a guess, is that plumber's putty is clay mixed
with a semi-drying oil, like soy bean oil. Old plumber's putty is stiff
and breaks easily. But, it's not nearly as rigid as old glazing putty.
So, if this is a drop-in sink, yeah, go ahead and use plumber's putty.