Sealing a pond
I have a concrete pond, the corners have been sealed with a black paint-on
substance, then a layer of what looks and feels like thick alu foil, then
more of the black stuff painted on.
The black stuff is very thin, more like a coat of paint than a rubberised
sealant.
Some of the foil type stuff has come away, I want to seal the corners in the
same manner. Problem is, I don't know what either the black substance or the
foil substance are.
Anyone know if this is standard stuff, or what?
Pete
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