Q-Seal 290S Black Detector Loop Sealant for Driveway Saw-Cut Loop Protection
Q-Seal 290S black driveway loop sealant is a one-component polyurethane detector loop sealant used to seal saw-cut loop wire in asphalt or concrete pavement. It is commonly used for automatic gate exit loops, safety loops, reverse loops, free-exit loops, and vehicle detection loops where the loop wire is installed in a cut slot and needs a flexible protective seal.
The black color is commonly selected for asphalt driveways, parking areas, and darker pavement where the sealant should blend into the saw cut. Grey loop sealant is commonly used when a closer match to concrete is preferred. Always confirm the color, cartridge size, loop layout, saw-cut dimensions, and installation method before ordering.
What This Product Does
Q-Seal 290S is used after the loop wire has been installed into the saw cut. The sealant fills the cut slot around the loop wire and helps protect it from water intrusion, pavement debris, vehicle traffic exposure, and common roadway chemicals. Proper loop sealing helps reduce loop wire movement and helps protect the insulation from damage inside the cut.
- Seals saw-cut channels used for vehicle detection loop wire
- Helps protect exit, safety, reverse, and detector loop wires from moisture
- One-component polyurethane formula does not require mixing
- Black color is commonly used on asphalt and dark pavement cuts
- Designed for use in both asphalt and concrete saw cuts when properly prepared
- Helps provide a weather-resistant and chemical-resistant waterproof seal
- Commonly used by gate, access control, parking, and traffic loop installers
Compatible With
This black Q-Seal 290S loop sealant may be used with select saw-cut vehicle loop installations where the pavement, loop wire, cut size, and installer method are compatible. It is commonly used with loop detector wire installed in asphalt or concrete surfaces.
- Automatic gate exit loop saw cuts
- Gate safety loop and reverse loop saw cuts
- Parking gate and barrier arm loop detector saw cuts
- Driveway vehicle detection loop installations
- Traffic detector loop wire installed in properly cleaned saw cuts
- Asphalt pavement where black sealant is preferred
- Concrete pavement when black sealant is acceptable for the job
Important Compatibility Warning
Do not confuse loop sealant with loop wire or a loop detector. Q-Seal 290S is the sealant used to protect the loop wire after the wire is placed in the saw cut. It does not detect vehicles by itself and it does not replace the loop detector module inside the gate operator or control cabinet.
The product title may say "1 Quart," but many Q-Seal 290S tube listings identify the cartridge as 30 fl oz. Before publishing or ordering, confirm the actual package size and whether the listing is priced per tube, per case, or as part of a loop installation kit.
Similar Products That Are Not Automatically Interchangeable
- Q-Seal 290S Grey: Same general loop sealant family, but grey color is commonly selected for concrete. It is not the black asphalt-matching version.
- Q-Seal 295: Related detector loop sealant family with a different product format and curing behavior. Do not substitute without confirming the job requirement.
- Generic asphalt crack filler: Not automatically suitable for detector loop wire. Some fillers may not protect loop wire properly or may not stay flexible in the saw cut.
- Concrete joint sealant: May be made for expansion joints, not detector loop saw cuts. Verify wire compatibility before using.
- Loop detector wire: The wire installed in the saw cut. It is not included unless specifically listed.
- Loop detector module: The electronic detector that senses the loop. This sealant does not replace the detector.
- Preformed loops: Prebuilt loop assemblies are different from saw-cut loop installations and may use different installation methods.
Not Intended For
- Use as a vehicle detector by itself
- Replacing loop detector wire or a loop detector module
- Sealing random driveway cracks where no detector loop wire is installed
- Use as a structural pavement repair product
- Use on wet, dirty, loose, oily, or poorly prepared saw cuts
- Replacing photo eyes, safety edges, loop detectors, or gate safety circuits
- Bypassing safety loops, reverse loops, monitored safety devices, or UL 325 entrapment protection
Features and Specifications
| Specification | Details |
| Brand / Product Family | Q-Seal 290S |
| Product Type | Detector loop saw-cut sealant |
| Color | Black |
| Container Size | Commonly listed as 30 fl oz / quart-style cartridge; verify actual size before publishing |
| Sealant Type | One-component thixotropic moisture-curing polyurethane |
| Primary Use | Sealing vehicle detector loop wire in saw-cut pavement slots |
| Common Applications | Driveway loops, exit loops, safety loops, reverse loops, parking loops, and traffic detector loops |
| Pavement Compatibility | Asphalt and concrete saw cuts when properly prepared |
| Common Coverage Reference | One tube may cover approximately two 4 ft x 6 ft loop cuts depending on saw-cut width and depth |
| Application Method | Cartridge applied into clean saw-cut slot using compatible caulking equipment and nozzle |
| Mixing Required | No mixing required for Q-Seal 290S one-component formula |
| Chemical Resistance | Designed to resist common roadway chemicals such as water, oil, fuel exposure, salts, and similar contaminants when cured |
| Accessories Not Automatically Included | Loop wire, detector module, saw blade, backer material, conduit, wire nuts, lead-in cable, and installation tools |
Package Contents
Package contents should be verified before publishing or shipment. A typical single-tube listing usually includes the black Q-Seal 290S sealant cartridge. Applicator nozzles may be included with some tube packages, but this should be confirmed before promising it in the product listing.
- Q-Seal 290S black detector loop sealant cartridge
- Applicator nozzle only if included with the current supplier package
- Loop wire, loop detector, lead-in cable, and installation tools sold separately unless specifically listed
Also Known As / Related Product Names
- Q-Seal 290S black loop sealant
- Q Seal driveway loop sealant
- Q-Seal detector loop sealant
- Black driveway loop sealant
- Exit loop sealant
- Safety loop sealant
- Reverse loop sealant
- Traffic detector loop sealant
- Polyurethane loop wire saw-cut sealant
Related Parts and Service Checks
Before sealing a loop, inspect the full loop installation. A good sealant will not correct a bad loop layout, nicked loop wire, wrong wire type, shorted turns, poor lead-in splice, water-filled conduit, or a failed loop detector module.
- Confirm the saw-cut layout matches the exit, safety, or reverse loop design.
- Confirm the loop wire type and number of turns before sealing.
- Clean and dry the saw cut before applying sealant.
- Check for sharp corners, wire insulation damage, loose debris, water, and oil in the cut.
- Test the loop before sealing whenever possible.
- Confirm whether black or grey sealant is preferred for the pavement surface.
- Estimate coverage based on saw-cut width, depth, and total loop length.
- Confirm the loop detector module and operator input are working correctly after installation.
Technician Note
Loop sealant is one of those small items that can make or break a saw-cut loop installation. If water gets into the saw cut or the wire is not held properly, the loop can become unstable, intermittent, or fail early. Clean cuts, correct wire depth, proper loop testing, and a good seal are all important.
Do not use generic crack filler unless it is approved for loop detector wire saw cuts. Some products are too rigid, do not bond well, or may not protect the wire insulation properly over time.
Before Ordering Checklist
- Confirm the product needed is Q-Seal 290S black loop sealant.
- Confirm whether the listing is a 30 fl oz cartridge or another package size.
- Confirm black is the correct color for the driveway or pavement surface.
- Measure the loop saw-cut width, depth, and total length to estimate coverage.
- Check whether one tube is enough for the number of loops being sealed.
- Confirm whether applicator nozzles are included.
- Verify loop wire, detector module, and lead-in cable are ordered separately if needed.
- Confirm the pavement cut will be clean, dry, and ready for sealant application.
Installation and Service Notes
This product should be applied by a qualified gate, access control, parking, or traffic loop installer familiar with saw-cut loop installation. Follow the sealant instructions and safety data sheet for handling, personal protection, ventilation, storage, cleanup, and cure conditions.
Do not seal a loop until the loop wire is installed correctly and the circuit has been checked. Do not bypass safety loops, reverse loops, photo eyes, safety edges, gate operator inputs, or other required entrapment protection to make a gate run. If a gate does not respond correctly after a loop installation, diagnose the loop wire, detector module, operator input, and safety devices.
Professional Advisory
Vehicle detection loops are part of the gate or parking control system. Exit loops, safety loops, and reverse loops must be laid out, wired, sealed, and tested correctly for the operator and traffic pattern. If the loop function is unclear, have the system reviewed by a qualified gate or access control technician before cutting pavement or sealing the wire.
For South Florida customers, local pickup in the Hialeah Gardens area may be available when inventory allows. Confirm color, tube size, and current stock before coming in for pickup.
Product Questions and Answers
What is Q-Seal 290S black loop sealant used for?
Q-Seal 290S black loop sealant is used to seal saw-cut slots after vehicle detector loop wire is installed. It is commonly used for driveway exit loops, safety loops, reverse loops, parking loops, and traffic detector loops.
Is this the black version for asphalt driveways?
Yes. Black Q-Seal 290S is commonly selected for asphalt and dark pavement cuts. Grey Q-Seal is commonly used when a closer concrete color match is preferred.
Is this a full quart or a 30 oz tube?
Many Q-Seal 290S listings describe the tube as 30 fl oz even when the product title says 1 Quart. Confirm the actual package size before ordering if exact volume matters.
Does this sealant include loop wire or a loop detector?
No. This is the sealant used to protect loop wire in a saw cut. Loop wire, loop detector modules, lead-in cable, conduit, and installation tools are separate unless specifically listed.
How much loop cut will one tube cover?
Coverage depends on saw-cut width and depth, but one tube is commonly used as a reference for approximately two 4 ft x 6 ft loop cuts. Always estimate coverage from the actual cut dimensions.
Can Q-Seal 290S be used in concrete saw cuts?
Yes. Q-Seal 290S is used in both asphalt and concrete saw cuts when the cut is properly prepared. Black may be used in concrete when color match is not a concern, while grey is often preferred for concrete.
Is this the same as regular driveway crack filler?
No. Q-Seal 290S is a detector loop sealant made for loop wire saw cuts. Generic driveway crack fillers may not protect loop wire properly and should not be substituted without verifying wire compatibility.
What should be checked before sealing a driveway loop?
Confirm the loop layout, wire type, number of turns, saw-cut depth, clean and dry cut condition, detector operation, sealant color, coverage needs, and whether the loop is for exit, safety, reverse, or vehicle detection use.
