The Airtight Solution for
Electrical Junction Boxes
BOX SHELL is a patented enclosure system that completely seals electrical junction boxes — eliminating air infiltration, reducing energy loss, and meeting LEED, WELL, and Passive House standards. No caulk. No tape. No electrician required.
BOX SHELL is a patent-pending and inexpensive invention that creates an airtight insulation barrier around electrical junction boxes. It eliminates air and noise infiltration through walls. Unlike traditional perimeter gaskets or flanges, BOX SHELL encloses the entire box, including all wire entry points, for a true airtight seal.
Whether you are a commercial contractor, home builder, or doing your own remodel, BOX SHELL ensures your walls are insulated correctly the first time, every time.
No Caulk. No Tape.
Installs completely dry with a compression-fit design. No adhesives, no cleanup — just snap it in place and you're done.
No Electrician Needed
Any crew member can install BOX SHELL after the box is mounted and rough-wired. Save on specialized labor costs on every project.
Full Box Enclosure
Seals around the entire junction box and all wire entries — not just the front face. The only true airtight solution available.
Improves HERS Scores
Reducing air infiltration at electrical boxes is one of the most cost-effective ways to improve a home's energy rating. BOX SHELL makes it simple.
Recycled Materials
Made from natural recycled materials — a sustainable choice that supports LEED and green building project requirements.
Fast Installation
Standardized fit across single, double, and triple gang boxes. Install faster and more consistently on every job site.
Single BOX SHELL
$2.39For single gang electrical boxes. Perfect for outlets, switches, and receptacles.
Order NowDouble BOX SHELL
$2.49For double gang electrical boxes. Ideal for duplex outlets and multi-switch panels.
Order NowTriple BOX SHELL
$2.79For triple gang electrical boxes. The solution for larger multi-device wall plates.
Order NowBOX SHELL is the only junction box sealing solution certified across all four major high-performance building standards — making it the go-to choice for green building projects, net-zero homes, and energy-efficient construction.
BOX SHELL is engineered to satisfy the most demanding energy code and green building requirements in the industry — from national energy codes to the world's most rigorous voluntary certification programs.
⚡ IECC 2024 Compliant
BOX SHELL meets the air sealing requirements of the 2024 International Energy Conservation Code (IECC), the most current edition of the national model energy code. By fully enclosing the junction box and all wire penetrations, BOX SHELL satisfies Section R402.4 air barrier requirements without caulk, tape, or additional labor. View the 2024 IECC Code →
🏠 Passive House Ready
Passive House construction demands an airtight building envelope with virtually zero uncontrolled air leakage. BOX SHELL is the ideal solution for Passive House projects — it eliminates one of the most common and overlooked air leakage points in the building envelope. With no caulk or tape required, BOX SHELL enables faster, more consistent installation while meeting the strict airtightness thresholds required by PHIUS and PHI certification standards.
🌿 LEED v4 & v5 Project Credits
BOX SHELL supports points under the LEED v4 and v5 rating systems, particularly within the Energy & Atmosphere and Indoor Environmental Quality credit categories. By reducing air infiltration at electrical penetrations, BOX SHELL contributes to improved building envelope performance — a key factor in achieving EA Credit: Optimize Energy Performance and supporting EQ Credit: Enhanced Indoor Air Quality Strategies. Made from recycled materials, BOX SHELL also contributes toward Materials & Resources credits for sustainable product sourcing.
🌍 As featured on GreenBuildingAdvisor.com — the leading resource for high-performance home building professionals.
Proudly Made in the USA
BOX SHELL is manufactured in the United States with sustainable practices, using natural recycled materials. Supporting American manufacturing while building a greener future.
Ready to Seal It Right?
Join contractors and builders across America who trust BOX SHELL to meet the highest energy performance standards — without the extra labor or cost.
Shop BOX SHELL Now