SpecSeal® Firestop Blocks are high‑performance intumescent penetration firestop solutions engineered to resemble lightweight, easy‑to‑handle foam bricks. Made from durable intumescent urethane foam, these blocks are installed by compressing and stacking them into openings in a brick‑like fashion, creating a clean and efficient firestop seal without the need for caulks, putties, or mineral wool. When exposed to high temperatures, SpecSeal Firestop Blocks rapidly expand, forming a dense, insulating char that helps block the spread of fire, smoke, and hot gases through wall and floor penetrations. Their re‑enterable design makes them ideal for cable tray openings, busways, complex MEP conditions, and blank penetrations. Engineered for versatility and code‑compliant fire protection, SpecSeal Firestop Blocks provide a simple, reusable, and time‑saving solution for both new construction and retrofit applications.

Features

• Intumescent – expands in all directions for a tough, tight seal
• Reinstallable for easy retrofitting of various pipes, cables, and innerducts
• Lightweight for ease of installation
• Easier wire screen requirements for large openings and 2 hour ratings
• No special tools required
• Superior air leakage ratings
• No cure time -> fast application
• Block may be coated using primer if required
• Dust-free, fiber-free, halogen-free, and solvent-free

24 pcs/ctn