The SpecSeal® Quick Clip Factory Installation System (L‑Bracket) is the fastest and most efficient solution for installing curtain wall insulation in perimeter fire containment systems. Engineered for speed and simplicity, the system uses durable L‑shaped brackets that attach directly to the mullion. Once secured, installers simply cut and position the curtain wall insulation, then lock it in place using self‑locking fasteners for a secure, code‑compliant installation. The Quick Clip System is designed to eliminate the need for stiffener channels in most applications where insulation thickness exceeds 2 inches. When a stiffener channel is required, it can be locked into position without additional mechanical fastening, further reducing installation time. Versatile and installer‑friendly, the SpecSeal Quick Clip System is ideal for factory‑installed curtain wall panels, unitized systems, and recladding or retrofit projects where insulation must be installed from the building exterior. This innovative system enhances jobsite productivity while delivering reliable performance in perimeter fire barrier assemblies.