Metacaulk Putty is a moldable non-curing 1-component fire-rated material for through penetration firestop systems. Intumesces when exposed to fire, forming an insulating char. Prevents spread of flames/smoke/gas/water through penetrations.

• For interior use and has No Volatile Solvents- useful when installing in confined spaces or occupied areas. Does not have Asbestos Fillers. D.O.T Classification is Not Regulated.
• Applied by hand and Easy to install- Mixing never required and no special skills or additives are necessary for installation. Adheres to all common building common surfaces.
• Rated for up to 3 hrs. in accordance with the ASTM E 814, UL 1479 and ULC/CAN4-S115-M test standards. Pads have Sound Transmission Class (STC) Rating 60. Only one pad thickness (1/8") needed for a 1-2hr. fire rating.
• No additional putty material needed to plug end of each electrical metallic tube or conduit as its connection to the box.
• Required by Building Codes in rated partitions where horizontal separation of opposite facing electrical boxes is under 24 inches.