CF Sprayer

Fill it with construction foam in the Canning Machine (CF powder + water → foam, then fill). Holds 8000 mB and uses 100 mB per block. On a scaffold it replaces the connected scaffolds; on anything else it sprays a layer of 13 blocks. Foam can be walked through and hardens with light (at light 15, about 4 minutes; in the dark, never); sand hardens it instantly. On wooden scaffolds or air it becomes a foam wall; on iron scaffolds, reinforced stone.