SpecSeal® FP Intumescent Firestop Plugs provide a fast, reliable way to create a robust fire‑ and smoke‑resistant seal in conduit stubs, sleeves, and blank openings. Designed for both temporary overnight protection and permanent long‑term firestop solutions, these plugs offer exceptional versatility across a wide range of commercial, industrial, and low‑voltage applications. Sized to fit 2-inch and 4-inch diameter openings, SpecSeal Firestop Plugs install in seconds—no tools, putty, or additional hardware required. Their high‑expansion intumescent material activates under fire exposure, helping to block flame, smoke, and hot gases while maintaining system integrity. Ideal for managing cable penetrations or sealing unused pathways, SpecSeal FP Firestop Plugs offer a clean, code‑compliant, and time‑efficient solution for maintaining fire‑rated assemblies.