MAXIMIZER Concrete is the strongest concrete mix available on the market in a bag. Easy to mix, the product cures to a strength of 5500psi. It delivers superior product using a special aggregate formula and is uniquely formulated to provide more coverage per bag than the leading competitor. One 40 lb. bag of MAXIMIZER will yield as much as an 80 lb. bag of ordinary concrete. Using MAXIMIZER allows you to finish projects in less time with outstanding results.