Metacaulk Box Guard 4 11/16" Box

Metacaulk Box Guard 4 11/16" Box Fire-Rated Electrical Box Insert Metacaulk Box Guard 4 11/16" Box is a single-component fire-rated insert designed for use inside electrical boxes. It serves as a firestop material that expands upon exposure to fire, forming a char that seals openings to prevent the spread of flames and limits temperature rise on unexposed surfaces. This product is suitable for electrical distributors and switchgear suppliers needing reliable fire protection solutions for wire and cable installations within electrical boxes. It complies with NEC 314.16 and other applicable codes. Specifications Manufacturer: RectorSeal Manufacturer Part #: 66369 Product Weight: 11.04 lbs Size: Double for 5.5" box (4-3/8" x 4-3/8" x 1/4") Color: Black Dielectric Breakdown Voltage: 22 V/mil (ASTM D149) Sound Transmission Class (STC) Rating: 53 Flame Spread: 5 (ASTM E84, UL 723 Tunnel Test) Smoke Index: 5 (ASTM E84, UL 723 Tunnel Test) Volatile Organic Compounds (VOC): <1% or <10 g/L Solubility: Insoluble in water Stability: Stable Non-conductive Features Highly intumescent firestop pad expands to seal electrical box openings during fire Easy to install by hand, adheres to inside back wall of electrical boxes Complies with NEC 314.16 and UL fire resistance standards (UL 263/ASTM E119) Maintains integrity of fire-rated wall assemblies by restricting flame passage and temperature rise Tested to ASTM G21 standard with zero fungal growth Non-hazardous, asbestos and solvent free Suitable for use in firestop systems inspected per ASTM E2174 and ASTM E2393 Downloads & Links Safety Data Sheet Spec Sheet Certified Clean Air Gold Certificate SDS - Spanish