I want to install 2"X4" boards to a 12'x12' patio slab that is 2" thick. I was told that drilling along the patio borders would crack the concrete. Is there a product avaiable that will bond wood to concrete?
There are many products available which will bond wood to concrete but in your case adhering wood (24x48 plywood?) directly to concrete its a wrong practice at the first place especially doing so on the patio slab.