Suitable dry mortar bags must protect the formulation from humidity, survive handling at construction-product weights, release air during filling, and retain fine cementitious particles. Valve-style multiwall kraft bags and lined woven bags are common options, but each serves different operating conditions.

Dry mortar is commonly packed in multiwall kraft valve bags because they support rapid filling, controlled air release, clear printing, and stable pallet formation. The best structure depends on mortar density, particle composition, moisture sensitivity, filling weight, and distribution conditions.