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Ucrete SL+
Sika Ucrete SL+ is a solid color, self-leveling urethane cement slurry system engineered with Sika Ucrete HS22 NA at 160 to 250 mils (4 to 6.3 mm), per the November 2025 system data sheet. Specs written as Ucrete HS22 map to Ucrete SL Plus: Sika Ucrete HS22 NA is the product, and SL+ is the system built on it. Duty environments on the sheet’s use list include food processing plants, wet and dry process areas, freezers and coolers, dairies, breweries, wineries, distilleries, laboratories, chemical process plants, and pulp and paper plants. The sheet lists service temperature at -40°F to 248°F. Installed at 3/16 to 1/4 inch, the floor is steam-cleanable.
Craftsman Concrete Floors installs Ucrete SL+ nationwide as a Sika Certified Installer, with in-house W-2 crews and pre-install substrate testing on every pour. The system’s moisture tolerance is unusual for the class, taking green concrete at typically 7 to 10 days and substrate readings up to 100% relative humidity per ASTM F2170. Tensile adhesion exceeds 400 psi per ASTM D7234. Under impact the cured slurry behaves plastically, deforming without cracking or debonding, with 5.02 ft-lb recorded at 1/8 inch per ASTM D2794.
Ucrete SL+ System Specifications and Duty Range
Every value in this section traces to two current Sika documents: the Sika Ucrete SL+ System Data Sheet (November 2025, Version 01.01) and the Sika Ucrete HS22 NA Product Data Sheet (March 2026, Version 06.01). Exact figures, kit contents, and application instructions are on the embedded data sheet below. What follows is the working summary an estimator or spec engineer needs before committing the system to a drawing.
160 to 250 Mils of HS22 NA Over a Primed Substrate
The build is two layers. Sikafloor-2570 WB at 3 to 5 mils or Sika Ucrete TC31 NA at 15 to 20 mils primes the concrete, and Sika Ucrete HS22 NA goes down at 160 to 250 mils as the self-leveling body. Minimum system thickness is 160 mils, and the sheet warns that HS22 NA placed at 1/8 inch will not level and will show surface imperfections. A kit covers 31 square feet at 3/16 inch. As the base coat of a moisture vapor tolerant build, HS22 NA runs at a 125-mil minimum.
Steam-Cleanable at 3/16 to 1/4 Inch, With Concrete-Matched Expansion
Service temperature runs -40°F to 248°F, and steam cleaning is sanctioned once the floor is placed at 3/16 to 1/4 inch. The mechanism is thermal expansion. The cured slurry’s coefficient is similar to concrete’s, so floor and slab move together through washdown and freezer cycling instead of shearing at the bond line. Chemical resistance covers a wide range of organic and inorganic acids, alkalis, amines, salts, and solvents per the system sheet. Impact loads deform the material plastically rather than cracking or debonding it.
Green Concrete at 7 to 10 Days, 100% RH per ASTM F2170
Sika publishes the substrate requirements as hard numbers. Concrete needs at least 3,625 psi compressive strength at 28 days and 218 psi tensile strength at the time of application, profiled to ICRI-CSP 3-6. Application proceeds at up to 100% relative humidity per ASTM F2170, above 4% surface moisture by Tramex meter, and on green concrete at typically 7 to 10 days. Craftsman runs pre-install moisture and substrate testing on every pour, and the readings land in the closeout documentation alongside the surface-profile record.
Specs Written as Ucrete HS22 Map to Ucrete SL Plus
Ucrete HS22 names the product; Ucrete SL+ names the system. Sika Ucrete HS22 NA is the three-component urethane cement slurry, and SL+ is the floor system current Sika literature engineers with it, so a spec line reading Ucrete HS22 prices and installs as a Ucrete SL+ floor with no substitution request. Craftsman Concrete Floors holds Sika Certified Installer status across the Sika Ucrete range. The Sika overview page covers where SL+ sits against UD 200 and the broadcast systems, and vertical depth lives on the dairy, brewery, and food processing pages.
Frequently Asked Questions
Sika Ucrete SL+ protects concrete in aggressive processing environments, with the system data sheet listing food processing plants, wet and dry process areas, freezers and coolers, dairies, breweries, wineries, distilleries, laboratories, chemical process plants, and pulp and paper plants. It installs at 160 to 250 mils of Sika Ucrete HS22 NA over a primed substrate. For cross-brand system selection, start at the main urethane cement installation overview.
Thickness and duty separate them. Sika Ucrete SL installs at 80 to 160 mils for general industrial floors, while Sika Ucrete SL+ installs at 160 to 250 mils for heavier abrasion, impact, chemical, and thermal-shock duty, with tensile adhesion above 400 psi per ASTM D7234.
Ucrete HS22 resolves to the Ucrete SL Plus system. Sika Ucrete HS22 NA is the current three-component slurry product, and SL+ is the system Sika engineers with it at 160 to 250 mils, so an HS22 line item is bid and built as a Ucrete SL+ floor, not as a substitution.
Foot traffic at roughly 18 hours, light traffic at roughly 24 hours, and full cure at about 5 days at 68°F, per the Sika Ucrete HS22 NA product data sheet (March 2026). Phased zone-by-zone scheduling keeps adjacent lines running while each pour cures.
Yes, within the data sheet’s limits. Application on green concrete typically runs at 7 to 10 days, and the system tolerates up to 100% relative humidity per ASTM F2170 and surface moisture above 4% by Tramex meter. At a 125-mil minimum, Sika Ucrete HS22 NA also serves as the base coat of a moisture vapor tolerant build.
The system data sheet states that Sika Ucrete SL+ meets the requirements of USDA for use in food plants. The cured floor is non-tainting and odorless, rated 0 for fungi growth under ASTM G21 and 10, the highest resistance rating, for mold growth under ASTM D3273.
Sikafloor-2570 WB at 3 to 5 mils or Sika Ucrete TC31 NA, formerly Ucrete DP TC, at 15 to 20 mils primes the substrate per the system data sheet. Sika Ucrete HS22 NA forms the slurry body, and the HS22 NA product data sheet names Ucrete TC31 NA as the sealer.
Craftsman Concrete Floors installs Ucrete SL+ as a Sika Certified Installer. In-house W-2 crews provide national service coverage, with pre-install ASTM F2170 moisture testing and audit-ready closeout documentation on every project; the urethane cement contractor page covers the install process itself.
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