Smith’s Poly JF — Semi-Rigid Joint Filler

Smith’s Poly JF is a heavy-duty, self-leveling, semi-rigid polyurethane joint filler built to fill and protect control-joint edges from the traffic erosion and spalling that forklift, caster, and vehicular traffic cause. This pourable, 100% solids 2-component filler supports joint shoulders under heavy loads, so your joints — and the floor around them — hold up. Also well suited for crack, spall, and gouge repairs up to 5″ deep.

Call for pricing and availability, or request a quote — you’ll talk to a real surface-prep expert, not a call center — fast answers and real recommendations.

Key Features

• Semi-rigid polyurethane — supports and protects joint edges under heavy traffic
• Self-leveling, pourable — easy to place and finish
• 100% solids — zero VOC, low odor, non-tainting
• Fast — shave in 90–120 minutes, diamond grind in ~6 hours, forklift traffic in 8–10 hours
• Moisture tolerant — can be used with Smith’s moisture-mitigation primers on damp slabs
• Bonds tenaciously to concrete, overlays, coatings, tile, and metal
• For joints and repairs up to 5″ deep
• FDA/USDA/CFIA facility acceptable — non-tainting
• No red-label shipping required

What It’s For

• Filling and protecting control joints subject to forklift, caster, and vehicular traffic
• Protecting joint edges from erosion and spalling under heavy loads
• Crack, spall, and gouge repairs up to 5″ deep
• Interior industrial floors — warehouses, manufacturing, food & beverage

Why Fill Control Joints?

Control joints are where floor damage starts. Under forklift and heavy traffic, unprotected joint edges erode, chip, and spall — and once an edge breaks down, the damage spreads. Poly JF fills the joint and supports those edges with a semi-rigid shoulder that takes the load, protecting the joint and the surrounding floor. Fill the joints and you protect the whole floor.

Poly JF vs. PCF-45 — Which Do You Need?

Two different repair products for two different jobs:

• Poly JF (this product) — a semi-rigid joint filler for filling and protecting control joints under traffic; supports joint edges against erosion and spalling
• PCF-45 — a fast-set crack filler and patch for repairing static cracks, spalls, and pits in the slab

Filling control joints under forklift traffic? Poly JF. Patching cracks and pits before coating or polishing? PCF-45. Not sure? Call us.

Specifications

• Type: 2-component, moisture-cured, semi-rigid polyurethane (4A:1B by volume)
• Solids: 100% (zero VOC)
• Color: Natural Beige (tint with Smith’s ISC Color Packs)
• Pot life: ~20 minutes at 72°F
• Shave: 90–120 min; diamond grind: ~5–7 hrs (dry) at 72°F
• Forklift traffic: 8–10 hours
• Hardness: 65 Shore D; elongation: 30%
• Service temperature: 40°F to 200°F
• Kit sizes: 40 oz and 1.25-gallon kits (made to order)
• Shelf life: 2 years unopened; 30 days once opened

Important to Know

• Requires proper joint prep (saw-cut/clean the joint, sand or backer rod at the base)
• Semi-rigid, not elastomeric — designed for control joints, not high-movement expansion joints
• Not UV stable — for interior use; will dull/chalk with UV exposure
• Made-to-order — non-stocking product; call to order

Frequently Asked Questions

What’s it for? Filling and protecting concrete control joints from forklift and traffic erosion, plus deep crack/spall repairs.

How fast can I grind it? Shave in 90–120 minutes; diamond grind in about 6 hours; forklift traffic in 8–10 hours.

How’s it different from PCF-45? Poly JF is a semi-rigid joint filler for control joints; PCF-45 is a crack filler/patch for static cracks and pits.

Can I use it in expansion joints? No — it’s semi-rigid, made for control joints, not high-movement expansion joints.

Order Smith’s Poly JF Today

Call (815) 941-4800 x 1 or fill out our contact form. See our PCF-45 crack filler, industrial coatings, and Smith Paints.

Item# SCS-POLYJF-160KIT