Portland cement as far as I know with sand. I am not sure as I am not
doing it myself.


On Sat, 06 Mar 2004 15:41:47 -0500, Hal wrote:

What kind of cement? I used a sand mix to make a waterfall liner and
coated it with GE Silicon caulk to keep it from leaking water through
the porous cement.

Regards,

Hal

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