Mullion Mate® is an adjustable partition closure that creates the perfect transition between window mullions, windows, and partition walls.

Mullion Mate® is an adjustable partition closure that creates a seamless transition between window mullions (curtain walls), windows, and partition walls. Aesthetically pleasing, these spring-loaded partition closures bridge the gap to fit a variety of openings and provide excellent noise reduction up to 56 STC. Finished to match mullions, factory cut to length, and arriving to the jobsite pre-assembled, Mullion Mate’s ease of installation creates the solution to an everyday problem.

Design Attributes

  • For vertical junctions between partition walls and window mullions
  • Finished to match mullions
  • Clear, medium, or dark bronze anodized, and Champagne
  • Field paintable finish
  • Powder coated in standard or custom colors (AAMA2604/AAMA2605)
  • Custom Finishes available upon request
  • Factory spring loaded to fit a variety opening
  • Pre-assembled for ease of installation
  • Factory cut to desired height, maximum 192″
  • Optional Mullion Mate end cap to finish partition walls

Features & Benefits

Mullion Mate® 2,3,4 & 5 – Series 30 (Up to 37 STC)

Mullion Mate® 7 – Series 30 (Up to 37 STC)

Mullion Mate® 9 – Series 30 (Up to 37 STC)

Mullion Mate® 3,4 & 5 – Series 40 (Up to 56 STC)

Mullion Mate® 7 – Series 40 (Up to 56 STC)

Mullion Mate® 9 – Series 40 (Up to 56 STC)

Finish Options

AAMA 2604 Powder Coat Finishes

AAMA 2605 Powder Coat Finishes

Antimicrobial Finishes

Green By Design

  • Products contribute to LEED® certification
  • In-House Finishes

Product Data

Mullion Mate® Series 30 Consolidated Set

Mullion Mate® Series 40 Plus Consolidated Set

Mullion Mate® Series 30 Specifications

Mullion Mate® Series 40 Plus Specifications

Gap Closures for Fire Rated Walls

Brochure

Cleaning & Maintenance

White Paper (STC Acoustics)

PRODUCTS PARTITION GAP CLOSURES