Thanks for all this information. You got me interested. What is the lime to water ratio? Do you think it can be painted on while the birds are currently living in the coop?The mixture is largely water so yes it does saturate into the wood; the lime is dust so even subsequent coats penetrate. Also, the more coats the whiter it become; the 1st coat goes on translucent, leaves one wondering if a mistake has been made, drys to white.
There is no change to the surface of the wood, does not harden.
I too have read it is anti-fungal.
As I indicated above this is back in the day stuff. Not a lot of science just decades of farmers using it inside barns, coops, etc. and word of mouth collaborating it works.
I bought a bag of hydrated lime, did two coats and still have half the bag left. $17 for a 6kg bag at the time I purchased, $23.99 today.
Hard to understand why one would not use it for animal enclosures if other than a wood finish is desired.