MBW3H – 3 Hour

JOINT SIZE: 1-4″ (max 6″ open)*
MOVEMENT: ±50% to ±100% Expansion/Contraction
FEATURES: Versatile, fire -resistant barrier for vertical expansion joints; Installs without mechanical fasteners or fire caulking; Minimal depth of 2 1/2″ required for installation; Ships in 7′, tongue and groove lengths for easy splicing and transitioning; Ideal for use with elastomeric seals
PERFORMANCE: Fire resistance rating of 1-4 hours tested in accordance with ASTM E1966 and UL 2079; Seismic, Thermal and Wind movement tested per standard ASTM E 1399; Contributes to LEED® credits

(*Joint size availability varies slightly between products.)


Wall-to-Wall/Corner (MBW3H)


Wall-to-Wall/Corner (MBW3H)


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Technical Data

MBW3H – 3 Hour

Installation Instructions

Additional Info