Specified Technologies FP400 SpecSeal FP Intumescent Firestop Plug, 4" Diameter

Rapidly create reliable fire and smoke barriers around cable and conduit runs with the Specified Technologies SpecSeal FP Intumescent Firestop Plug (FP400). Designed for busy security, surveillance and monitoring installations, this 4-inch diameter plug is compressible for fast, tool-free insertion into conduit stubs or sleeves and is sold in practical packs of 10 to support staged deployments.

Made from polyurethane intumescent material, the FP400 expands when exposed to heat to seal gaps and restore fire-resistance in gypsum and concrete walls and floors—helping you meet firestop requirements and protect critical communication, networking and low-voltage cabling. The paintable, environmentally friendly plug has no expiration date, simplifying logistics and long-term stocking for contractors and facility teams. Compatible with other SpecSeal firestop products, it integrates smoothly into broader fire protection strategies.

Use the SpecSeal FP400 to secure openings around surveillance cameras, access control wiring, monitoring sensors and network cabling. Order FP400 plugs to speed installation, improve compliance, and protect your security infrastructure.

• Fast, reliable fire and smoke sealing for 4-inch openings to protect cable and conduit penetrations
• Compressible polyurethane intumescent design for quick, tool-free installation—ideal for temporary overnight or permanent use
• Expands under heat to restore fire-resistance, helping maintain code compliance in walls and floors
• Tested in gypsum and concrete assemblies for proven performance in commercial security and networking installations
• Paintable, environmentally friendly material with no expiration date for flexible inventory management
• Compatible with other SpecSeal products to create integrated firestop solutions for surveillance, monitoring, and low-voltage systems