Metacaulk 1200, 5 .gal Pail Spray

Metacaulk 1200, 5 gal Pail Spray Firestop Sealant Metacaulk 1200 is a single-component, fire-rated sealant designed for construction joints to prevent the spread of flames, smoke, hot gases, and water through joint openings. Suitable for use in both vertical and horizontal joints, it cures to an elastomeric membrane that accommodates dynamic movement. This water-based mastic is ideal for firestopping applications in building construction and is compatible with various installation methods including spray, brush, or direct application from cartridge or container. It is commonly used by electrical distributors and switchgear suppliers as part of comprehensive fire and smoke barrier solutions. Specifications Manufacturer: RectorSeal Manufacturer Part #: 66379 Product Weight: 58.71 lbs Color: Red or White Appearance: Red or white paste with mild odor Boiling Point: 212°F (100°C) Specific Gravity: 1.1 Vapor Pressure: 17 mmHg @ 68°F (20°C) Evaporation Rate: >1 (Ethyl Acetate = 1) Flash Point: None VOC Content: <1% or <10 g/L (61.8 µg/m³) pH Value: 7 to 8 Curing Time: 5 to 7 days at 77°F (25°C) for 1/8” thickness Coverage Volume (1/8” wet depth): 1115 cubic inches per 5-gallon pail Fire Resistance Classification: Up to 3 hours per UL 2079 Test Standards: ASTM E1399 (500 cycles), ASTM E814 (UL1479) up to 2 hours Storage Temperature: 35°F to 120°F (2°C to 49°C) Features Single-component, no dilution or mixing required Water-based, environmentally compliant with low VOCs Highly elastomeric, flexible seal suitable for dynamic movement Can be applied by spray, brush, or directly from cartridge or container Paintable and mold-resistant due to built-in biocides Effective smoke barrier with excellent firestop performance Stable and non-flammable with no hazardous polymerization Non-toxic with no classified carcinogens or hazardous ingredients Compatible with various construction joint types including perimeter, expansion, control joints, and ductwork Minimum 2-year shelf life when stored properly Downloads & Links Safety Data Sheet PDS - Spanish Spec Sheet PDS - French SDS - French SDS - Spanish Certified Clean Air Gold Certificate