Metacaulk® 1000 is a water-based, flexible, highly intumescent sealant designed for use on metal, insulated, fiberglass and plastic pipes. It can also be used for top of the wall construction joints, as well as power and telephone cables. Sound Transmission Class (STC) rating 62, Tested in a UL 411 wall assembly/section to ASTM E90.
 
Metacaulk 1000 Intumescent Firestop Sealant
Features
UL Classified Systems up to 4 hrs.
High intumescent
VOC compliant
Excellent freeze-thaw
For interior use – paintable
Meets ASTM E 814, UL 1479 & UL 2079 standards.
STC rating 62