- Product: Sherwin-Williams Poly-Crete SL — 100% solids, aromatic, cementitious urethane self-leveling system
- Nominal Thickness: ~1/8 inch
- Finish: smooth, self-leveling matte; for a slip-resistant version, Poly-Crete SLB adds a flintshot quartz broadcast
- Chemistry: cementitious urethane; coefficient of thermal expansion similar to concrete
- System Performance (Poly-Crete platform, per Sherwin-Williams system data):
- – Compressive strength 9,000 psi (ASTM C579)
- – Hardness Shore D 75–80 (ASTM D2240)
- – Exact per-product values are on the embedded data sheet
- Compliance: Poly-Crete systems are formulated to follow USDA, FDA, CFIA, ADA, and OSHA guidelines
- Color: Poly-Crete system colors, 10 standard
- Typical Uses: commercial and light-industrial floors, production and processing areas, and as a smooth base coat within broadcast Poly-Crete systems
- Former Names: Dur-A-Flex Poly-Crete SL; General Polymers FasTop Multi Topfloor SL23
- Authorized Installer: Sherwin-Williams High Performance Flooring; in-house W-2 crews mobilize nationwide
Phone: +1 (844) 687-1961
Sherwin-Williams Poly-Crete SL is a 100% solids, aromatic, cementitious urethane system applied at approximately 1/8 inch to produce a smooth, self-leveling matte finish. It is the smooth, thinner member of the Poly-Crete line — specified where a flat, easy-to-clean, monolithic surface matters and aggressive broadcast slip resistance is not the governing requirement. Like the rest of the family it bonds as a cementitious urethane rather than a surface film, with a coefficient of thermal expansion close to concrete. If your specification still reads Dur-A-Flex Poly-Crete SL or the older General Polymers FasTop Multi Topfloor SL23, this is the same system under its current Sherwin-Williams High Performance Flooring name. Craftsman Concrete Floors installs Poly-Crete SL nationwide as an authorized Sherwin-Williams High Performance Flooring installer.
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About Sherwin-Williams Poly-Crete SL
Poly-Crete SL is the smooth, self-leveling system in the Poly-Crete cementitious urethane line — the thinnest standard build and the one specified where finish flatness matters more than aggressive slip texture.
Smooth Self-Leveling at 1/8 Inch
Poly-Crete SL pours self-level to a smooth matte finish at roughly 1/8 inch — no joints to fail and nothing for wash water to sit in — for commercial and light-industrial floors. Where a floor sees wet or greasy traffic and needs grip, the broadcast version — Poly-Crete SLB — is the correct specification; SL itself is the smooth option. It also serves as the smooth Poly-Crete body coat within broadcast systems.
Cementitious Urethane Behavior
Poly-Crete SL is a 100% solids cementitious urethane: it cures into a monolithic floor bonded to the slab rather than a film laid on top, with a coefficient of thermal expansion close to concrete so it moves with the substrate through thermal cycling. As a Poly-Crete system it is formulated to follow USDA, FDA, CFIA, ADA, and OSHA guidelines, and the published platform carries a 9,000 psi compressive strength (ASTM C579). Exact figures for this build are on the embedded data sheet.
Formerly Dur-A-Flex Poly-Crete SL and FasTop Multi Topfloor SL23
Older specifications call this floor by two other names. Dur-A-Flex sold it as Poly-Crete SL until Sherwin-Williams acquired the company on July 1, 2022 and kept the product name; General Polymers sold the equivalent system as FasTop Multi Topfloor SL23 until the 2025 branding transition folded the FasTop line into Poly-Crete. All three names land on the same current system, and Craftsman maps the legacy callout to the current product during pre-bid review.
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Frequently Asked Questions
Poly-Crete SL is a 100% solids, aromatic, cementitious urethane applied at approximately 1/8 inch to a smooth, self-leveling matte finish. It is the flat, easy-clean grade of the Poly-Crete line, specified where finish flatness and cleanability matter more than broadcast slip texture: commercial and light-industrial floors, production areas, and as the smooth base inside broadcast Poly-Crete systems. Like the whole family, it bonds as a cementitious urethane with a coefficient of thermal expansion close to concrete, tolerating slab moisture that would blister epoxy. Legacy specs may call it Dur-A-Flex Poly-Crete SL or General Polymers FasTop Multi Topfloor SL23. Both map to this current system. The data sheet is on this page for submittals. Craftsman Concrete Floors installs Poly-Crete SL nationwide as an authorized Sherwin-Williams HPF installer.
Specify SL when the floor needs to be flat, smooth, and fast to clean. Specify SLB when wet or greasy traffic makes broadcast slip resistance the governing requirement. SL’s smooth self-leveling surface releases soil under routine scrubbing and suits dry-to-damp commercial and light-industrial service. SLB carries a quartz broadcast in a gloss finish, purpose-built for breweries, distilleries, and wet manufacturing where grip underfoot is the safety case. The two share chemistry. The difference is entirely texture and the maintenance regime that follows from it. Over-texturing a floor that does not need it is a common specification mistake that surfaces later as a cleanability complaint. Craftsman Concrete Floors calibrates the SL-versus-SLB decision to your slip assessment and sanitation program before quoting.
It can, within the limits on the product data sheet. As a cementitious urethane, Poly-Crete SL tolerates elevated slab moisture far better than epoxy. Moisture tolerance for the Poly-Crete family runs to 20 lbs/1,000 sq ft/24 hours by calcium chloride testing or 99% relative humidity in-situ, far beyond epoxy’s typical limits. That headroom removes the moisture-barrier line item epoxy usually forces on new slabs. Substrate still must be sound, profiled by shot blast, and free of contaminants, with perimeter keyways cut per the installation guidelines. On compressed construction schedules this is often the deciding advantage. Craftsman Concrete Floors verifies slab moisture on-site and sequences SL installation into fast-track schedules.
Two legacy names land on this system. Dur-A-Flex Poly-Crete SL dates from before Sherwin-Williams acquired Dur-A-Flex on July 1, 2022. General Polymers FasTop Multi Topfloor SL23 folded into the Poly-Crete line in the 2025 branding transition. Formulations and grade identity carried through both transitions; the manufacturer block changed, the floor did not. Specs written under either legacy name install as current Poly-Crete SL with the current data sheet in the submittal. Reviewers typically accept a short mapping note documenting the name succession. Craftsman Concrete Floors maps legacy callouts during pre-bid review so the submittal cycle never stalls on a renamed product.
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