VAE is not modified Latex but a closely related polymer.
Latex and acrylic polymers will form a barrier when they dry. That causes delamination. As long as either or both are overlaid while they are wet or tacky, it bonds well.
Some Latex paint has additives that will cause mortar to set within 15 minutes on a summer day. I avoid them because it also tends to make the mortar and concrete brittle. When I pick up a piece of that delaminated mortar, it rings like a ceramic tile and is very brittle. The cheapest Latex paint works best for me as long as it didnt have the alcohol I mentioned before.
I consider Tite Bond 2 to be a far safer bet than latex for bonding and half the price of VAE. Paint manufactures change formulations frequently.
Whatever you use, be sure to test it rigorously before putting it anywhere you have to live with.
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