Class C high quality, free flowing non shrink, high early strength development and high ultimate strength gain cementitious grout. Penatech HES complies with US Corp of Engineers Spec CRDC 621-82A and ATSM C1107-91 for Class C grout. Cementitious grouting where high early strength is required.?Heavy duty support grout beneath high load machine base plates. Precision grouting applications, anchoring bolt holes, bridge bearing pads, crane rail plates, pre-cast concrete sections, cavities, gaps and recesses. Rapid reinstatement of equipment, minimizes downtime. Grouting requiring dynamic load bearing and applications subject to continuous vibration.