Help sealing a leaking concrete laundry room sink?
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Need to seal concrete sink that leaks water
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Is the sink itself leaking due to a crack?
If this sink is cracked, I would try some of that sealing rubber advertised on TV! FLEXSEAL...you can now buy it at Home Depot!
Flex seal caulk really works well.
Try the new Flex Seal! It comes in a spray or a brush on gallon. It comes in grey, white , black and clear..and it's guaranteed to seal leaks!! Now sold at Walmart and other big retailers,too.
You can try fixing the seal with M-seal. Donot add water. just mix it all together to make a fine dough and apply it