Firestopping Gaskets of one-piece, molded rubber, intumescent pads that install beneath a 3 or 4 inch (76 or 102 mm) closet flange to effectively firestop the opening.
Fast, easy installation - no tools required., Installs from the top - Saves Labor., Clean installation - No caulk to clean up., Always ready to use - no shelf life or caulk tubes to dry out.