Overhead Door Loop Finder: Install Diagrams + Sealant & Sand Calculators

For overhead doors, common in garages, warehouses, and commercial facilities, BD Loops helps manage safe and automatic entry or exit. Loops are installed in the driveway or floor beneath the door's path to detect vehicles approaching or standing in the opening zone. This detection allows the door to stay open, reopen if a car is detected mid-close, or trigger an automatic opening for exiting vehicles. Using BD Loops with overhead doors reduces wear and tear on the door system while improving traffic flow and safety.

Overhead doors also require two loops: an inside reverse loop (or exit loop) and an outside reverse loop. These loops prevent the door from closing if a vehicle is in the path and can reopen it if necessary. The exit loop can also trigger the door to open automatically. For sites with multiple doors, keep loops at least 4 feet apart to prevent interference. Adding an exit loop on long approaches opens doors before vehicles arrive.

Key Takeaways:

• Minimum 2 loops: inside + outside reverse or exit loops.
• Exit loop adds automatic opening functionality.
• Maintain 4 feet between loops when installing near multiple doors.
• Add extra exit loop for faster access on long driveways.

How to Read BD Loop Numbers

Overhead Door Safety Loop Finder

PLEASE NOTE: BD Loops provides loop layout diagrams to promote understanding of proper loop installations. While they strive for accuracy, the information may not account for all variables, and users should consider unique site conditions. The diagrams are for informational purposes, not specific safety or installation guidance. The installer and owner are responsible for ensuring proper design, implementation, and maintenance.

BD Loops does not guarantee that the diagrams will meet vehicle detection needs in every case. They make no warranties regarding their products or diagrams and are not liable for misuse, modifications, or damages caused by third-party installations. Users assume all risks, including personal injury, related to the use of BD Loops' products and materials.

Doorway Width	Direct Burial Loops	Direct Burial Loops
	Reverse Loop: SC 20-20 Reverse Loop: SC 20-50 Exit Loop: SC 20-50 Example Install Diagram	Reverse Loop: RL 20-40 Exit Loop: EL 20-60 Example Install Diagram
	Reverse Loop: SC 24-20 Reverse Loop: SC 24-50 Exit Loop: SC 24-100 Example Install Diagram	Reverse Loop: RL 24-40 Exit Loop: EL 24-60 Example Install Diagram
	Reverse Loop: SC 24-50 Exit Loop: SC 24-100 Example Install Diagram	Reverse Loop: RL 24-40 Exit Loop: EL 24-100 Example Install Diagram
	Reverse Loop: SC 28-50 Exit Loop: SC 28-100 Example Install Diagram	Reverse Loop: EL 28-60 Exit Loop: EL 28-100 Example Install Diagram
	Reverse Loop: SC 28-50 Exit Loop: SC 28-100 Example Install Diagram	Reverse Loop: EL 28-60 Exit Loop: EL 28-100 Example Install Diagram
	Reverse Loop: SC 32-50 Exit Loop: SC 32-100 Example Install Diagram	Reverse Loop: RL 32-40 Exit Loop: EL 32-100 Example Install Diagram
	Reverse Loop: SC 32-50 Exit Loop: SC 32-100 Example Install Diagram	Reverse Loop: RL 32-40 Exit Loop: EL 32-100 Example Install Diagram
	Reverse Loop: SC 36-50 Exit Loop: SC 36-100 Example Install Diagram	Reverse Loop: RL 36-40 Exit Loop: EL 36-100 Example Install Diagram
	Reverse Loop: SC 36-50 Exit Loop: SC 36-100 Example Install Diagram	Reverse Loop: RL 36-40 Exit Loop: EL 36-100 Example Install Diagram
	Reverse Loop: SC 40-50 Exit Loop: SC 40-100 Example Install Diagram	Reverse Loop: EL 40-60 Exit Loop: EL 40-100 Example Install Diagram
	Reverse Loop: SC 40-50 Exit Loop: SC 40-100 Example Install Diagram	Reverse Loop: EL 40-60 Exit Loop: EL 40-100 Example Install Diagram
	Reverse Loop: SC 44-50 Exit Loop: SC 44-100 Example Install Diagram	Reverse Loop: RL 44-40 Exit Loop: EL 44-100 Example Install Diagram
	Reverse Loop: SC 44-50 Exit Loop: SC 44-100 Example Install Diagram	Reverse Loop: RL 44-40 Exit Loop: EL 44-100 Example Install Diagram
	Reverse Loop: SC 46-50 Exit Loop: SC 46-100 Example Install Diagram	Reverse Loop: RL 46-40 Exit Loop: EL 44-100 Example Install Diagram
	Reverse Loop: SC 48-50 Exit Loop: SC 48-100 Example Install Diagram	Reverse Loop: RL 48-40 Exit Loop: EL 48-100 Example Install Diagram
	Reverse Loop: SC 52-50 Exit Loop: SC 52-100 Example Install Diagram	Reverse Loop: RL 52-40 Exit Loop: EL 52-100 Example Install Diagram
	Reverse Loop: SC 52-50 Exit Loop: SC 52-100 Example Install Diagram	Reverse Loop: RL 52-40 Exit Loop: EL 52-100 Example Install Diagram
	Reverse Loop: SC 54-50 Exit Loop: SC 54-100 Example Install Diagram	Reverse Loop: RL 54-40 Exit Loop: EL 54-100 Example Install Diagram
Need a bigger loop or longer lead-in lengths?	Contact Us to Order	Contact Us to Order

Vehicle Loop Installation Sealants & Calculator

Installing vehicle detection loops isn't just about proper placement, it's also about protecting your installation for the long haul. The right sealant ensures your loop wires stay secure, insulated, and free from moisture or debris. Equally important are the accessories that make installation, testing, and maintenance easier and more reliable. Below, you'll find a breakdown of our most trusted loop sealants and must-have tools. Whether you're sealing a loop in extreme weather or troubleshooting a system in the field, these products help ensure your installation is smooth, professional, and built to last.

BD Vehicle Loop Sealant

The BD Loop Shield Caulk Sealant and BD-LG2 are professional-grade sealants designed to protect loop wire installations in various conditions. The Shield Caulk Sealant features a self-leveling, UV- and weather-resistant polymer formula that adheres to surfaces like concrete, asphalt, and brick, and can even be applied to damp areas. It comes in a 30oz tube with applicator tips and is made in the USA from 100% solid materials that won't shrink. The BD-LG2 is a two-component polyurethane sealant formulated for cold-weather use, maintaining flexibility and strength in low temperatures while bonding to metal, plastic, and rubber for a durable, airtight seal.

Loop Sealant (Black)

Loop Sealant (Gray)

Winter-Grade Sealant

BD Vehicle Loop Accessories

Loop Sealant Dispensing Gun

This professional-grade dispensing gun is specially designed for use with dual-cartridge, two-component sealants like the BD-LG2 Winter-Grade Sealant. Its dripless design ensures a clean application with no mess or waste, making it ideal for both professional installers and DIYers. The gun features ergonomic grips for comfort and precise control, allowing for smooth and consistent sealant flow. If you're working with two-part sealants in challenging environments, this tool is a must-have for reliable and efficient application.

Shop Now

E-Z Detector Checker

The E-Z Detector Checker is a compact, handheld tool designed to simplify troubleshooting of vehicle loop detection systems. Acting as a fully functional test loop, it allows technicians to quickly identify issues in the detector, wiring, or loop circuit by simulating real-world conditions. An LED light confirms if the loop is energized, and a simple button press simulates a vehicle detection to verify detector and operator response. Housed in a durable PVC shell and powered directly by the gate operator, it requires no batteries and significantly reduces the time and guesswork involved in servicing loops, helping to avoid unnecessary loop cuts and repeat service calls.

Shop Now

Water-Tight Splice Kit

When splicing loop wires is necessary, the BD Loops Water-Tight Splice Kit provides a reliable solution for creating moisture-resistant, corrosion-proof connections. The kit includes double-walled, adhesive-lined shrink tubing and glue tape to create a layered, watertight seal. It's designed for use with preformed loops or 16 AWG or thicker wires, and is ideal for both repairs and extensions. Proper splicing prevents signal interference and protects against long-term damage from water exposure. Tools like a soldering iron and heat gun are required for best results.

Shop Now

BD Loops offers a full suite of products designed to make your vehicle detection installations more efficient, durable, and reliable. From expertly engineered preformed loops to high-quality sealants and essential accessories, every component is built with performance and installer convenience in mind. Whether you're working in harsh weather, on varied surfaces, or need to ensure long-term protection for your loop system, BD Loops provides the trusted solutions professionals rely on.

If you have any questions about loop selection, sealant quantities, or installation best practices, please don't hesitate to reach out. We're here to help you get the job done right.