My birdbath is 30 years old. It is made of concrete (weighs a ton) and it leaks because it is full of pits and pock-marks. Some of these pits are 1/4 inch deep.
How can I refurbish this old relic? Hydraulic cement? Concrete patch? Grout?
My birds will love you. They really enjoy splashing around in there. They even wait in line for their turn. Fun to watch.
An epoxy based paint type product would probably work. You could also get the color you want, but it's not cheap and it may only come in gallons, etc.
They also have waterproof, acrylic based coatings for asphalt roofs, chimney caps, etc. That might work, but IDK if it's rated for standing water. It does come in white though, HD and similar have it in the roofing section, online only though I think.
I used hydraulic cement to patch one for a customer . Scrub the basin out really well with a clorox solution to get all the gunk off , and rinse well . Apply the hydraulic cement while the basin is wet , it'll be easier to get a decent finish .
I tried several things but the only one that worked was a spray can of automotive undercoating. Of course, it is black so the water may get a bit warmer.
A couple coats of Redguard. Not cheap, but it will work. Paint after last coat has dried.
With the left-over's, you will find lots of uses.
It sounds like fun. I have space in the shade that doesn't grow grass. Would they like that, or would I have to put in in the sun?
If you're going to refinish, have you thought of putting in an island or a diving board?
I don't know if it's the same thing, but they sell small quanitites of epoxy paint in aerosol cans. Much smaller than a gallon, but one can will still give many coats to a bird bath. I don't know if it will work in standing water, but if it's the same as above, maybe. It comes in appliance colors, and dries as hard as and looks as good as, the same as the finish on an automatic washing machine. If you get white, OP, no one will know it was meant for a refrigerator.
How about a temporary solution while you research your options? Would something like large garbage bags or a vinyl tarp do the trick temporarily? Harbor Freight has cheap tarps.
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