A uniformly blended mixture of special fast-setting cement, sand, gravel and other approved ingredients engineered for applications requiring rapid setting time and high strength. Ideal for setting posts and poles without mixing; simply pour into post hole and add water. Also for concrete slab applications requiring a rapid set time. Easy to use, durable and strong, achieves 4000 psi. Fast 30 minute set time and 60 minute walk-on time allows same day use. Meets ASTM C-387 specifications.