Joint Fillers & Sealants
Joints fail before floors do. Every unfilled control joint is an edge waiting for a hard wheel — MavJoint JF semi-rigid joint filler supports that edge, protects the shoulders, and seals the slab clean.
The First Place a Floor Fails
Hard polyurethane forklift wheels concentrate enormous load on a contact patch the size of a coin. When that wheel crosses an open joint, the unsupported edge chips — and every pass makes it worse. MavJoint JF transfers that load across the joint instead of into it.
MavJoint JF is a two-component, semi-rigid joint filler for control and construction joints, installed full depth in saw-cut joints and shaved flush for a clean, seamless profile. It's rigid enough to carry wheel loads and flexible enough to tolerate normal slab movement — the balance that flexible caulks and rigid epoxies both get wrong. It also prevents debris accumulation in the joint.
Why Facilities Specify MavJoint JF
- Protects joint shoulders from hard-wheel impact and progressive spalling.
- Shaved flush — no concave caulk profile to trap debris or catch wheels.
- Seals out washdown water, fines, and bacteria in sanitary environments.
- Fast turnaround — shave in under two hours, traffic the same shift.
- Performs in freezers and ambient slabs alike, −20 °F to 140 °F service.
- Six standard colors to match the slab, the coating, or the brand.
MavJoint JF Joint Cross-Section
Full-depth fill of the saw cut, placed slightly proud and shaved flush after initial set — the profile that carries wheel loads across the joint.
Six Colors. Every Slab Covered.
From bare gray concrete to pigmented MavCoat finishes, one of the six standard MavJoint JF colors will read as part of the floor. Custom colors available on volume orders.
- Black High-traffic aisles, dark slabs
- Concrete Gray Matches cured bare concrete
- Dovetail Gray Mid-tone for sealed slabs
- Gauntlet Gray Deep gray, hides tire marking
- Intellectual Gray Warm gray for light interiors
- Warmstone Pairs with Sandstone finishes
On-screen swatches are CSS approximations. Request a physical color card for final selection — cured color varies with lighting and slab tone.
Hard Wheels, Clean Protocols
- Warehouse & Distribution
- Manufacturing
- Food & Beverage
- Cold Storage & Freezer
- Retail
- Parking Structures
Typical Properties
| Property | Test Method | Typical Value |
|---|---|---|
| Hardness | ASTM D2240, Shore A | 80 ± 5 |
| Tensile strength | ASTM D412 | 1,100 psi |
| Elongation | ASTM D412 | 200% |
| Tack-free time | 75 °F | 10–15 minutes |
| Shave window | 75 °F | 45–120 minutes |
| Return to traffic | 75 °F | 2–4 hours |
| Service temperature | Continuous | −20 °F to 140 °F |
| Minimum fill depth | Saw-cut joints | 1″ (full depth of cut) |
| Joint movement capability | Shear / lateral | ±10% |
| Standard colors | — | 6 (see color chart) |
Complete the Joint Program
MavPatch Epoxy
Spalled joint shoulders get rebuilt square with MavPatch Epoxy before filling — the only way a filler can do its job on a damaged joint.
View in CatalogMavPolyPatch
Quick-setting polyurea crack and spot patch filler for divots and random cracks adjacent to the joint program — repaired and trafficable the same shift.
View in CatalogMavCoat FC
On fast-track projects, MavJoint JF's same-shift shave window keeps pace with the MavCoat FC rapid-cure basecoat's overnight coating schedule.
View in CatalogDetails & Specifications
The MAV-JT detail series covers control joint fill, expansion joint treatment, isolation joints at equipment pads, and terminations at dissimilar finishes.
Details & Drawings — Joint Systems
Joint fill and treatment details: control joint fill and overlay, expansion joints, isolation joints, and penetration seals. PDF and DWG formats.
Browse the LibraryCSI 3-Part Specification
Edited 3-part guide specification for concrete floor joint fillers covering MavJoint JF joint preparation, fill depth, shave requirements, and color selection.
View SpecificationsHow Many Linear Feet Are Costing You Wheels?
Send us a slab plan or a rough joint count. We'll price a fill-and-shave program — including shoulder repair where it's needed — within 48 hours.