The Vapor Barrier for 4" Square and 2-Gang Device Boxes is designed to help protect approved electrical box installations where vapor barrier coverage is required.

This clear molded vapor barrier is suitable for 4" square electrical boxes and 2-gang 2" x 3" device boxes up to 3" deep. Its raised rectangular shape provides space around the electrical box while helping support air sealing and vapor control during wall or ceiling installations.

This product is commonly used by electricians, builders, contractors, and renovation teams in residential and light commercial projects where electrical boxes need to be properly sealed within insulated wall or ceiling assemblies.

Always confirm box size, installation method, wall or ceiling assembly requirements, and local electrical code before installation.

Key features

• Vapor barrier for electrical boxes
• Designed for 4" square boxes
• Fits 2-gang 2" x 3" device boxes up to 3" deep
• Clear molded plastic design
• Raised rectangular shape
• Helps support vapor barrier protection around electrical boxes
• Suitable for wall and ceiling electrical rough-ins
• Practical for residential, renovation, and contractor installations

Best used for

• 4" square electrical boxes
• 2-gang device boxes
• Wall electrical rough-ins
• Ceiling electrical rough-ins
• Residential wiring projects
• Renovation work
• Air sealing and vapor barrier applications
• Contractor electrical installations