Dry powder lime mortar: Heritage Mortar / NHL Natural Mortar /NHL 25kg bag will repoint 3 to 4 m2 brickwork or lay approx. 25 bricks. 1 tonne will repoint 120 to 160 m2 brickwork or lay approx. 1000 bricks. Colour Chart. The colour chart is a guide. To see the true colour please request a sample biscuit(s).