Is this plumber's tape to seal up wastes? In England they have these rubber cones with a washer and you wiggle it onto the waste, put its washer on, put the backnut on and tighten the backnut up. Instant seal. Brilliant bloody invention.
You're in the right country for granite but there are seven differnent grades. It depends how high up the mountain the granite comes from. Atmospheric pressure and all that. The worst grade you can chip with a heavy glass if you're not careful.
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