STI Ready Sleeve Firestop Kits (Up to 4") – Penetration Seal System

STI Ready Sleeve Firestop Kits (Up to 4") – Penetration Seal SystemSTI Ready Sleeve Kits are designed to help protect against the spread of smoke and fire in penetrations through gypsum board, block walls, concrete walls, and floors. These kits provide a firestop solution across multiple construction types, supporting consistent performance in rated assemblies. Available in sizes of 1", 2", and 4" in diameter, the kits allow users to select the appropriate size based on specific penetration requirements, supporting

double-wall Galvanneal steel

These pipe collars have been in use for more than 25 years as part of self-contained firestopping systems

and made from pulp‑free polyolefin-based synthetic material

supporting consistent coverage across a range of jobsite conditions

“Fire Hose

Single links connect two mats side‑to‑side or end‑to‑end

} 3M™ Fire Barrier 2000 Silicone Sealant (Non-slump) is a ready-to-use

Orders can include colors or logos without additional charges

Designed to accommodate diameters from 3 inches to 7 inches

The 15‑mil thick rigid plastic is durable yet bendable for indoor and outdoor temporary tagging applications

ZING padlocks are UL Validated for recycled content

cm) — 3 3⁄8" x 3 3⁄4" (86 mm x 95 mm) Allowable Cable Fill 0% to 100% (visual) 0% to 100% (visual) 0% to 100% (visual) Fire Resistance Ratings 1