The Core Water-retaining And Thickening Agent For Interior Wall Putty Locks In The Moisture Of The Slurry CMC Sodium Carboxymethyl Cellulose (CMC) is a water‑soluble anionic cellulose derived from natural cellulose. It appears as white fibrous powder, soluble in cold and hot water to form viscous colloids. This construction‑grade CMC is widely used as a functional additive for interior wall putty. It delivers excellent water retention, locking moisture in slurry to avoid