Acrylic will perform best when used in conjunction with other acrylic media. They can also be used in combination with other water base paints such as watercolors, gouache, poster paints, and water-based inks, although it is prudent to test each product combination thoroughly.
Mixing acrylic brands is generally acceptable; however, as each manufacturer uses a unique recipe, there can be a potential for incompatibility.
Note: Acrylics should not be mixed with oil or wax based products.