Mullion Mate®

Mullion Mate® Partition Gap Closures create a seamless transition between curtain walls, windows and partition walls. It is the only partition gap closure that can accommodate lateral movements caused by SEISMIC, THERMAL and WIND SWAY, while providing high acoustical value up-to 62 STC. All of this and our 2-Hr Fire Rating. Install it in 5 minutes or less!

Mullion Mate® Pro

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  • Closes Gaps from 4” up to 8-1/2”
  • Lateral Movement up to 1-15/16″
  • U.S. Patent No. 12,024,881

Mullion Mate® Pro FR

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  • Closes Gaps from 4” up to 8-1/2”
  • Lateral Movement up to 1-15/16″
  • 2-Hr Fire Rated per UL-2079 and CAN/ULC-S115

Mullion Mate® Plus

(Against the Glass)

  • Closes Gaps from 2” up to 13-1/2”
  • Lateral Movement up to 1-15/16″
  • U.S. Patent No. 12,442,181

Mullion Mate® Plus

(Against the Mullion)

  • Closes Gaps from 2” up to 13-1/2”
  • Lateral Movement up to 1-15/16″
  • U.S. Patent No. 12,442,181

Mullion Mate® Snap

Partition Wall End Caps

Instructional Videos

Product Data – Mullion Mate® Partition Gap Closures

Revit Families – Mullion Mate®

Mullion Mate® Pro Consolidated Set

Mullion Mate® Pro Fire Rated Consolidated Set
Mullion Mate® Plus Consolidated Set

Mullion Mate® Snap Consolidated Set

Mullion Mate® End Cap Details
Mullion Mate® Pro Specifications

Mullion Mate® Pro Fire Rated Specifications

Mullion Mate® Plus Specifications
Mullion Mate® Snap Specifications
Gap Closures for Fire Rated Walls
Technical Data (Seismic)

Mullion Mate® White Paper

Mullion Mate® Pro Installation Instructions
Mullion Mate® Pro Fire Rated Installation Instructions

Mullion Mate® Plus Installation Instructions

Mullion Mate® Snap Installation Instructions

Field Painting Mullion Mate®

Cleaning & Maintenance
Brochure

Mullion Mate®  Pro Cut Sheet

Mullion Mate®  Pro FR Cut Sheet

Mullion Mate®  Plus Cut Sheet

Mullion Mate®  Snap Cut Sheet

Mullion Mate®  End Cap Cut Sheet

Third-Party Certifications

PRODUCTSMULLION MATE® PARTITION GAP CLOSURES