The CFP (Construction Foam Pack) was created so that you don't have to repeat that refilling proces for the CF Sprayer over and over. Combine the CFPack (and a CF Sprayer, of course) with some scaffolds, and you can get yourself a creeper-proof bunker in no time!
The CFPack is able to hold up to the equivalent of 128 CF pellets, and is recharged at a canning machine, saving your mouse and finger from excessive clicking. The CFPack itself goes in the lower slot (where empty Tin Cans would go) and the CF pellets go in the upper slot (where food would go).
Unlike when using the BatPack, using the CFPack won't recharge/refill the actual Sprayer tool, simply maintain its initial charge level.
-Using the CFPack doubles CFPellet consumption.
-Recipe is broken for v1.337 and cannot be crafted without cheats or hotfix; seems to be fine in v1.42 onward.