Metacaulk 1200 Sprayable Firestop Mastic
Manufacturer RectorSeal Fire Stopping Products
SKU: 1200
Metacaulk 1200 Sprayable Firestop Mastic

Metacaulk® 1200 is a water-based firestop sealant that is a spray application which provides a fast, economical means of installation for long joint runs. Self-Leveling is made for horizontal applications and caulk grade is a non-sag sealant that is easy to apply. Metacaulk® 1200 is also an excellent, fire-rated acoustical sealant. It cures to an elastomeric membrane seal suitable for use where dynamic movement is expected. Red and white colors available. STC Rating 50*.

Self Leveling is made for horizontal applications where quick installations are necessary.  Metacaulk 1200 caulk grade is a non-sag sealant that is easy to apply.  It cures to an elastomeric membrane seal that is suitable where dynamic movement is expected.  In the event of a fire, Metacualk 1200 will prevent the spread of flames, smoke, hot gases and water through the joint openings.  No dilution or mixing is required for use.  Metacaulk® 1200 can be caulked from a tube, brushed or trowled from the pail, applied with a spray pump or poured; Metacaulk® 1200 systems are rated for up to 4-hour conditions.  It is also an excellent fire-rated acoustical sealant.


  • Curtain Wall Joints
  • HVAC Ductwork
  • Top-of-the-wall Construction Joints
  • Deflection Tack Wall Systems

Metacaulk® 1200 Features

  • Sprayable, Brushable, Trowelable, Caulkable, or Pourable
  • Freeze-Thaw
  • Water Based
  • Flexible and Elastomeric
  • Paintable
  • VOC Compliant
  • Excellent Smoke Seal
  • Sound Transmission Class (50*)

*Tested in a UL 411 wall assembly/section to ASTME90.


Metacaulk® 1200 | Product Information

Product Code Size Quantity Per Case
30 oz Cartridge
20.2 oz Sausage Pack
5 Gallon Sprayable
5 Gallon Caulk Grade
30 oz Cartridge-White
5 Gallon Spray-White


Additional Product Literature
Data Sheet
Safety Data Sheet