CMC and PAC is a high-purity, high-efficiency slurrying agent. ... is resistant to salt, base and moisture, compatible with sea CMC and PAC are resistant to salt, base and moisture, compatible ... . 0.8 or Min. 0.9 or Min. 1.0Viscosity: CMC LV, CMC HV, PAC LV, PAC HVPH: 6-9Partical size: Min ... inner. 18 months under dark, seal, cool and dry conditions. CMC - oil drilling grade