High Strength Precision Nonshrink Grout CGM-1P Description CGM-1P is the industry leading cement-based, nonmetallic, nonshrink grout for supporting machinery and equipment.It is formulated with air release technology that combines high performance with the greatest reliability. CGM-1P meets the performance requirements of specifications for nonshrink grout over a wide temperature range, 4 degree C and 32 degree C, and a long working time, 45 minutes.