- Current Name: Sherwin-Williams Poly-Crete MDB
- Former Names: Dur-A-Flex Poly-Crete MDB; General Polymers FasTop Topfloor SL57
- System Type: 100% solids, seamless cementitious urethane with natural quartz aggregate broadcast
- Thickness: 1/4″ nominal (Poly-Crete MD body coat at 3/16″ plus broadcast and topcoat)
- Finish: Slip-resistant matte broadcast texture; standard and custom colors available
- Service Temperature: -100°F to 220°F (Poly-Crete MDB with TF Plus system data)
- Topcoat Options: Poly-Crete TF Plus (matte; the submittal system’s topcoat); Poly-Crete Color-Fast (semi-gloss, UV stability); Resuflor 3741; Accelera 4850; Resuflor Glaze with Resutile AT; Resuflor UVE
- Compressive Strength: 8,990 psi (ASTM C579, 03/26 system overview)
- Hardness: Shore D 65–85 by topcoat (ASTM D2240); 65 with TF Plus
- Wet Dynamic COF: >0.42 (ANSI A326.3, published system data)
- Resistance to Elevated Temperatures: No slip or flow at 158°F (MIL-D-3134J)
- Abrasion Resistance: 30 mg loss (ASTM D4060, CS-17 wheel, 1,000 g, 1,000 cycles)
- Moisture Tolerance: Up to 99% RH; vapor transmission to 20 lbs/1,000 sq ft/24 hr (ASTM F1869)
- Return to Service: 8 hours to light foot traffic at 70°F, 24 hours at 60°F (MDB application instructions); full service per topcoat — TF Plus PDS lists 3-5 days at 70°F
Phone: +1 (844) 687-1961
Sherwin-Williams Poly-Crete MDB is a 100% solids, seamless cementitious urethane flooring system finished with a natural quartz aggregate broadcast at 1/4 inch nominal thickness. It is the current Sherwin-Williams High Performance Flooring name for the product sold as Dur-A-Flex Poly-Crete MDB before the July 1, 2022 acquisition, and specifications written as General Polymers FasTop Topfloor SL57 map here as well. The broadcast carries the slip resistance. The cementitious urethane body coat carries the moisture tolerance and the thermal-cycling behavior that put urethane cement in wet process areas in the first place.
Poly-Crete MDB is the heavier broadcast build in the Poly-Crete line, specified where floors take impact and rolling load on top of washdown duty. Every value on this page traces to the current Sherwin-Williams documentation for this system, the 03/26 system overview and the 01/25 Poly-Crete MDB with TF Plus submittal package, and both documents are linked below. Craftsman Concrete Floors installs it nationwide. The credential on file is authorized Sherwin-Williams High Performance Flooring installer.
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Poly-Crete MDB Specification Record
Quarter-Inch Broadcast Build on a Poly-Crete MD Body Coat
The build stacks five layers. A Poly-Crete TF Plus prime coat goes down first only where a porous substrate would outgas into the wet body coat; on most slabs priming is not required. The Poly-Crete MD body coat is pin-raked at 3/16 inch, a natural quartz aggregate broadcast lands at 1 pound per square foot behind the wet edge, and a grout coat plus pigmented topcoat close the system at 1/4 inch nominal. Compressive strength is 8,990 psi per ASTM C579 on the current 03/26 system overview, with hardness running Shore D 65 to 85 depending on the topcoat the spec selects.
Specs Written as FasTop Topfloor SL57 Map to Poly-Crete MDB
Specifications written as General Polymers FasTop Topfloor SL57 map to Poly-Crete MDB. One code, one destination. The FasTop urethane cement line was consolidated into Poly-Crete during the 2025 Sherwin-Williams High Performance Flooring branding transition, so a FasTop Topfloor SL57 line item in an older construction document is satisfied by the current MDB submittal package. The Dur-A-Flex layer is simpler. Sherwin-Williams acquired Dur-A-Flex on July 1, 2022 and retained the Poly-Crete product names, which means a spec reading Dur-A-Flex Poly-Crete MDB describes this same system with an older brand prefix. Neither legacy name requires a substitution request; the system role is unchanged.
Moisture Tolerance Is the Body Coat’s Job, Not a Primer’s
Substrate moisture up to 99% relative humidity, and vapor drive to 20 pounds per 1,000 square feet per 24 hours by calcium chloride test (ASTM F1869), sit inside the published limits for Poly-Crete floor systems. That is why the separate moisture-mitigation primer an epoxy build would need is eliminated in most environments. A published tolerance is a limit, not a substitute for testing. Our crews run pre-install moisture and substrate testing, including in-situ relative humidity probes per ASTM F2170, and the readings decide the build before material ships.
Wet Process Floors Under Impact and Rolling Load
Poly-Crete MDB runs where washdown duty overlaps with mechanical abuse. Typical placements are food and beverage processing lines, commercial kitchens, breweries and distilleries, cook-chill areas, and warehouse traffic aisles. The broadcast texture holds a wet dynamic coefficient of friction above the 0.42 acceptance value of ANSI A326.3 across topcoat options, per the published system data. Compliance architecture for those regulated verticals lives on the food and beverage pages; this page stays at product altitude. Craftsman installs Poly-Crete MDB with in-house W-2 crews, and installer qualification, submittals, and scheduling run through the urethane cement contractor page.
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Frequently Asked Questions
Poly-Crete MDB is a slip-resistant broadcast urethane cement floor for wet process areas that also take impact and rolling load — food and beverage processing, commercial kitchens, breweries and distilleries, and warehouse aisles. The natural quartz broadcast carries the traction and the 1/4-inch build carries the abuse.
Two legacy names route to Poly-Crete MDB. The product itself sold as Dur-A-Flex Poly-Crete MDB until the July 1, 2022 Sherwin-Williams acquisition, which retained the Poly-Crete name. Specifications written as General Polymers FasTop Topfloor SL57 also land here, because the 2025 Sherwin-Williams High Performance Flooring branding transition consolidated the FasTop urethane cement line into Poly-Crete.
Specs written as General Polymers FasTop Topfloor SL57 map to Poly-Crete MDB. Submit Poly-Crete MDB against the FasTop Topfloor SL57 line item with the current submittal package; the system role the spec describes is what MDB installs at 1/4 inch.
Poly-Crete MDB is the heavier of the two broadcast systems, a 1/4-inch build for process floors under impact and point loads, against Poly-Crete SLB’s 3/16-inch self-leveling broadcast build. Both finish slip-resistant. The extra thickness is what separates them on duty.
The submittal system’s topcoat is Poly-Crete TF Plus — matte, 100% solids. Poly-Crete Color-Fast substitutes where UV stability for color retention is specified, and the current system overview also lists Resuflor 3741, Accelera 4850, Resuflor Glaze with Resutile AT, and Resuflor UVE. Hardness runs Shore D 65 to 85 depending on which topcoat the spec selects.
Eight hours of cure before light foot traffic at 70°F, and 24 hours when the slab sits at 60°F, per the Poly-Crete MDB application instructions. Full service tracks the topcoat: the Poly-Crete TF Plus data sheet lists light traffic at 12 hours and full service in 3 to 5 days at 70°F, and heavier loads or lower temperatures extend the schedule.
In most environments, no. The cementitious urethane body coat tolerates substrate moisture up to 99% RH and vapor drive to 20 lbs per 1,000 sq ft per 24 hours by calcium chloride test (ASTM F1869), which eliminates the separate mitigation primer an epoxy system would require. We still verify the slab first with pre-install moisture and substrate testing, including in-situ RH probes per ASTM F2170.
Craftsman Concrete Floors installs Poly-Crete MDB as an authorized Sherwin-Williams High Performance Flooring installer. In-house W-2 crews mobilize nationwide. Qualification documents, submittal packages, and project scheduling for a Poly-Crete MDB installation all run through the urethane cement contractor page rather than through this data sheet page.
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