Freezing temperatures and the hot sun affect concrete birdbaths – if you leave yours in the elements without a sealant you will likely get pitting and cracking.
Sealing the surface with a non-toxic sealant helps your birdbath to be less porous so it holds water well and limits the freeze-thaw effects.
Of course, we want a sealant that is totally non-toxic to the birds and doesn’t leach any chemicals into the water. It’s also important to have a sealer that is safe for the humans who are applying it.
This article outlines the only truly non-toxic, no VOC, natural, non-leaching option that I know of that is safe for birds and humans.
While other options like epoxy paint can certainly be safe once fully cured, they are harsh at first for the people applying it and they can take some time to fully cure to get to the point of truly not leaching any chemicals.
This sealant works on most stone and terra-cotta birdbaths as well.[Read more…] about Non-Toxic Sealants for Concrete Birdbaths