SAKRETE PSI 6000 is a pre-blended, high strength, synthetic fibre reinforced, air-entrained concrete material. It is reinforced with alkali-resistant fibres to resist cracking and eliminate the need for wire mesh in many non-critical applications. It also contains an airentraining admixture which will produce a concrete with superior freeze-thaw and salt-scaling durability. Use for new concrete construction projects, concrete overlays and repairs where a thickness of 5 cm (2") or more is required. Open to foot traffic in approximately 24 hours.