Metacaulk® MC 150+ is a one-component, general purpose, fire-rated sealant and smoke seal for construction joints and through-penetrations. A water-based, non-sag caulking grade sealant that is easy to apply as well as to retrofit. An economic choice for most common applications. STC rating 51, Tested in a UL 411 wall assembly/section to ASTM E90.

• Economical
• Water-Based - VOC compliant
• Flexible Set
• Paintable
• Bonds Quickly
• Safe & easy to use