GROUTENATOR - Caulk Gun Injection System for Tile Grout, Mortar, Cement, Glues and more... Grout Bag and Float Replacement. Replace your Grout bag or Grout Float and try the easy no mess way! Grout lines as tight as 1/8" with the Reducing Cap. Up to 3/8" for Mortar. Heavy Duty 1/4" thick walls for durability. Results Fast and Clean! Disposable inner bags means no water or media escaping like seal types. FOR GROUTING: Use only SANDED GROUT for best results.