Thermal Break Aluminum Glazing Bar — T450 System Mullion Cap

Blomberg T450 System Mullion Cap — Precision Snap-Fit Glazing Bar

The Blomberg T450 System Mullion Cap is a precision-extruded aluminum glazing bar component engineered as a proprietary snap-fit cover for the T450N and T600 thermally-broken window-wall mullion system. Maintaining Blomberg's signature 5/8" slim sightline profile — the narrowest structural aluminum mullion available in the industry — this cap is purpose-built for high-rise and large-format curtain wall assemblies where aesthetics and structural performance are equally non-negotiable.

Tool-Free Field Installation

Blomberg's interlocking extrusion geometry enables tool-free field installation, delivering flush alignment across continuous window-wall runs without visible fasteners. The snap-fit design eliminates the need for mechanical fastening hardware, dramatically reducing installation time on large curtain wall projects while maintaining the clean, uninterrupted sightline that defines the T450 system aesthetic.

Class 1 Architectural Anodized Finish

Each cap is anodized in a durable Class 1 architectural finish, available in Clear, Bronze, and Black — providing superior corrosion resistance, UV stability, and color consistency across entire curtain wall elevations. Manufactured from 6063-T5 aerospace-grade aluminum alloy at Blomberg's Sacramento, CA facility, every component is held to precision dimensional tolerances that ensure consistent snap engagement and flush surface alignment across all units in a continuous run.

Specifications