Gardens Sealing ponds
I use a block wall sealant, like those available from a hardware
store, to seal a concrete pond? All the pond sealants I see seem
to be very expensive.
get what you pay for. Proper pond sealants are Elastomeric membranes.
This means that they stop water from passing through both ways,
so ground water will not seep in and lift off your sealant, as will
happen with a block wall waterproofing sealant.
Proper pond sealants
are well worth the extra cost, otherwise you will be resealing every
couple of years.
Gardener, Issue 99, 2002, Page 20
Reproduced with permission from the former Weekend Gardener magazine. The views expressed here are not necessarily those of the RNZIH.