Metacaulk Box Guard Double

Metacaulk Box Guard Double Fire-Rated Electrical Box Insert Metacaulk Box Guard Double is a single-component, highly intumescent fire-rated insert designed for use inside the back wall of electrical boxes. It expands when exposed to fire, forming a char that seals openings to prevent flame spread and limits temperature rise on unexposed surfaces. This product is suitable for electrical distributors and lighting solutions providers requiring reliable firestop materials compliant with NEC 314.16 and other applicable codes. Specifications Manufacturer: RectorSeal Manufacturer Part #: 66367 Product Weight: 8.02 oz Dimensions: 3-3/4" x 3-11/16" x 1/4" (94 mm x 95 mm x 6 mm) Color: Black Dielectric Breakdown Voltage: 22 V/mil (ASTM D149) Sound Transmission Class (STC) Rating: 53 Flame Spread: 5 (ASTM E84, UL 723) Smoke Index: 5 (ASTM E84, UL 723) VOC Content: < 1% or < 10 g/L (TVOC, CDPH 01350 v1.2 standard) Fire Test Standards: UL 263 / ASTM E119 Certified to: CAN/ULC S115, ASTM E814 Features Highly intumescent firestop material Easy to install by hand, adheres to the back of electrical boxes Non-conductive and safe for electrical applications Complies with NEC 314.16 firestop requirements Maintains fire integrity of rated wall assemblies by restricting flame passage Tested for environmental exposure including accelerated aging and high humidity Fungal growth rating of zero per ASTM G21 Suitable for use in double electrical boxes Downloads & Links Safety Data Sheet Spec Sheet Certified Clean Air Gold Certificate SDS - Spanish