What type of mortar can be used?
ASTRA-GLAZE-SW® + blocks should be laid in a full bed of mortar which is consistent with the best concrete masonry practices following the recommendations of NCMA Tek Note 9-1 carefully for best results. See Mortar information in the General binder section. All exterior mortar shall include W.R. Grace DRY-BLOCK® water repellent additive added to each batch in the appropriate dosage rates for mortar type (M,S, or N) per manufacturer s instructions.
