Metacaulk® 835+ is for applications that require a silicone-based firestop. Designed for use with PVC pipe on closed (pressure) systems, EMT, insulated and uninsulated steel pipe, construction and control joints and interior expansion joints. Flexible, non-sag and low odor sealant for exterior or interior use. Used in systems where dynamic movement is expected. Application temperature -20°F to 120°F. Sound Transmission Class (STC) rating 55, 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.
 
 
Exterior / Interior use
Weather/chemical resistant
Excellent moisture resistance
STC rating 55
Meets ASTM C920, Type S, Grade NS, Class 25, Use NT, M, G, A, O