The CF Sprayer is a tool for rapidly placing Construction Foam blocks. It will spray 13 blocks of Construction Foam in a blob around the block it was used on; the spread of the blocks depends on how the tool is aimed as well as the shape of the terrain. In a confined area, the Sprayer should be used with caution as the blocks will expand toward the nearest available space, which may include where the player is standing.
A CF Sprayer can place Construction Foam directly on Cables, which will retain all their normal cable properties in addition to becoming paintable Construction Foam blocks. Of particular note is the fact that the foam does not act as an insulator on uninsulated cables.
If a CF Sprayer is used on a Scaffold it will replace the nearest Scaffold blocks with the construction foam, dropping the scaffolds as items. This is useful for quickly building walls.