Specified Technologies Inc SpecSeal – Closet Flange Firestop Gasket 3″ or 4″ – CF34
A one-piece molded intumescent pad that installs beneath a 3″ or 4″ (76 mm or 102 mm) closet flange to effectively firestop the opening.
No tools required = fast, easy installation
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