METACAULK 350i FIRESTOP W/B *D*

Metacaulk 350i is a one-component, general purpose fire-rated sealant and smoke seal for construction joints and through-penetrations. Metacaulk 350i is an intumescent, water-based, non-sag caulking grade sealant that is easy to apply and great for retrofits. It cures to an elastomeric seal that is suitable where dynamic movement is expected. Can be applied to horizontal and vertical interior surfaces. Application temperature 40?F to 120?F. Sound Transmission Class (STC) rating 53, The test was performed in accordance with ASTM E 90, Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements.