Metacaulk 1200, 5 .gal Caulk Grade, White

Metacaulk 1200, Firestop Sealant for Construction Joints Metacaulk 1200 is a single-component, water-based firestop sealant designed for use in construction joints to prevent the spread of flames, smoke, hot gases, and water. Suitable for both vertical and horizontal joints, it cures to form an elastomeric membrane that accommodates dynamic movement, making it ideal for applications requiring flexibility and durability. This product is commonly used by electrical distributors and lighting solutions providers in firestopping systems, ductwork sealing, and joint protection to maintain fire and smoke barriers in building construction. Specifications Manufacturer: RectorSeal Manufacturer Part #: 66386 Product Weight: 60.65 lbs Color: White Application: Spray, brush, or direct from cartridge or container Material Base: Water-based Curing Time: 5 to 7 days at 77°F (25°C) for 1/8" thickness Density: 10.5 lbs/gal pH: 7 to 8 VOC Content: Negligible (meets VOC requirements) Boiling Point: 212°F (100°C) Specific Gravity: 1.1 Flash Point: None Fire Resistance: UL Classified up to 3 hours per UL 2079 Tested for dynamic movement per ASTM E1399 (500 cycles) Approved up to 2 hours under ASTM E814 (UL 1479) Coverage Volume: Approximately 1115 cubic inches per 5-gallon container (1/8" depth) Features Single-component, ready to use without dilution or mixing Elastomeric seal suitable for dynamic movement and vibration Prevents the spread of fire, smoke, hot gases, and water through joints Flexible and paintable with excellent smoke barrier properties Can be applied by spray, brush, caulking gun, or spatula Freeze-thaw stable and protected against mold growth with biocides Meets stringent fire resistance and smoke propagation standards Non-toxic, non-flammable, and non-corrosive with low health hazards Minimum 2-year shelf life when stored properly between 35°F and 120°F Downloads & Links Safety Data Sheet PDS - Spanish Spec Sheet PDS - French SDS - French SDS - Spanish Certified Clean Air Gold Certificate