Sika® Ucrete® 33 NA

• Conformity with LEED®v4 MR Credit (Option 1): Building Product Disclosure and Optimization – Environmental Product Declarations.
• Conformity with LEED®v4 IEQ Credit: Low-Emitting Materials.

• Conformity with LEED®v4 MR Credit (Option 1): Building Product Disclosure and Optimization - Material Ingredients.
• Conformity with LEED®v4 MR Credit (Option 1): Building Product Disclosure and Optimization - Sourcing of Raw Materials.

Sika® Ucrete® 33 NA meets the requirements of CFIA and USDA for use in food plants.

Water-dispersed polyurethane-cement hybrid

12 months in original unopened packaging

Store dry between 10 °C and 25 °C (50 °F and 77 °F). Protect from freezing. If frozen, discard adequately.

Part 1 + Part 2 + Part 3 = ~5 g/L

Sika®Ucrete® systems offer exceptional resistance to a wide range of chemical aggressors. For example, Sika® Ucrete® 33 NA can be considered for the following commonly encountered chemicals:

• Acetic Acid, 50%: Spirit vinegar is widely used in the food industry, indicative of resistant to vinegar, sauces, etc.
• Concentrated Lactic Acid @ 60 °C (140 °F): Indicative of resistance to milk and dairy products)
• Oleic Acids, 100% @ 60 °C (140 °F): Representative of the organic acids formed by oxidation of vegetables and animal fats widely encountered in the food industry
• Concentrated Citric Acid: As found in citrus fruits and representative of the wider range of fruit acids which can rapidly degrade other resin floors.
• Methanol, 100%: Representative of alcohols and the wider range of solvents used in the pharmaceutical industry
• Sika® Ucrete® 33 NA can be considered when exposed to a wide range of mineral oils, salts and inorganic acid

For further information, please contact Sika® technical support.

IMPORTANT: Optimal chemical resistance is achieved after 7 days of curing. Stains or discolouration may occur with certain chemicals, depending on the nature of the spill and the contact time with the coating surface. Equally important is adherence to maintenance standards, including strictly following the instructions for diluting the cleaning product used. It should be understood that improper use of the cleaning product (including, but not limited to, using a concentration higher than indicated or mixing cleaning products) can, in some cases, cause more damage than certain chemicals.

Minimum -40 °C (-40 °F)  / Maximum  90 °C (194 °F) continuous service temperature as a standalone coating.

As a top coat onto Sika® Ucrete ® mortars, refer to the most recent specific mortar Product Data Sheet.

~130 °C (~266 °F)

Condition product at temperatures between 18 °C (65 °F) and 24 °C (75 °F) before use.

Minimum 7 °C (45 °F)  /  Maximum  30 °C (86 °F)

Maximum 85 % (during application and curing)

Substrate must be at least 3 °C (5 °F) above the Dew Point to reduce the risk of condensation, which may lead to adhesion failure or "blushing" on the floor finish. Be aware that the substrate temperature may actually be lower than the ambient temperature.

Minimum 7 °C (45 °F)  /  Maximum  30 °C (86 °F)

Sika® Ucrete® 33 NA can be applied on substrates with higher moisture content. Check for rising moisture. The substrate must be visibly dry without standing water.

Note: Any application attempted at materi al, ambient, and substrate temperatures below 18°C (65°F) will result in reduced product workability and a slower curing rate.

Curing times will vary according to air and substrate temperature and rel ative humidity

Mechanical, chemical and physical properties will be fully achieved at full cure

Sika® Ucrete® 33 NA

1 x 6.09 kg mix of Sika® Ucrete® 33 NA consisting of:

1 (one) x Part 1 + 1 (one) x Part 2 + 1 (one) x Part 3 will yield:  

Approx. 8.8 m² (95 ft²) per unit at 20 mils (0.5 mm)

Approx. 17.6 m² (190 ft²) per unit at 10 mils (.25 mm)

NOTE: Actual coverage rates and material consumption will depend upon porosity and profile of substrates.  Allowance must also be made for variation in film thickness or number of coats required to achieve complete coverage of surfaces. Test sections are recommended to establish correct coverage.

Concrete surfaces must be clean and sound. The compressive strength of the concrete substrate should be at least 25 MPa (3625 psi) at 28 days and a minimum of 1.5 MPa (217 psi) in tensile strength, at the time of application.

Substrates must be free of contaminants such as dust, dirt, existing paint films, efflorescence, exudates, laitance, form, hydraulic or fuel oils, brake fluid, grease, fungus, mildew, biological residues or any other contaminants which may prohibit good bond or conditions of the substrate that may reduce the overall performances of Sika® Ucrete® 33 NA.

Before work commences, examine the areas to be covered and report any improper condition(s) in writing to the general contractor, architect or engineer (or otherwise, the owner). User shall not proceed with the work until surfaces and conditions comply with the requirements indicated in this document; applicable industry standards; federal, provincial and local regulations, as well as good trade practices. By starting work, the Applicator/User acknowledges that the conditions are acceptable.

Prepare the surface by any appropriate mechanical means, in order to achieve a profile equivalent to a minimum of ICRI CSP 3.

Repairs to cementitious substrates, filling of blowholes, levelling of irregularities, etc. should be carried out using an appropriate Sika profiling mortar. Contact Sika Technical Service for recommendations in writing.

Note: Contact Sika’s Technical Service for installation recommendations in writing concerning substrates or conditions not listed.

Expansion Joints

Expansion joints should be provided in the substrates at the intersection of dissimilar materials. Isolate areas subject to thermal stresses, vibration movements or around load-bearing columns and at vessel sealing rings. Communicate with Sika®'s technical services. 

The owner and architect should discuss joint details with the flooring contractor before the job starts.

Mix Ratio: Parts 1:2:3 = 1 (one) x Part 1 :1 (one) x Part 2 : 1 (one) x Part 3

Note: Mix only complete units

Do not hand mix Sika® Ucrete® materials; mechanically mix only.  Mixing will be affected by temperature; condition materials for use to 18 °C (65 °F) to 24°C (75°F) for at least 24 hours before use.  On no account should this product be thinned. Addition of thinners (e.g., water or solvent) will retard the cure, reduce the ultimate properties of this product and void any applicable Sika warranty. 

Pre-agitate Part 1 and Part 2 separately, making sure all solids, including pigments, are uniformly distributed.  Start mixer; add Par 1 and Part 2, blending for 30 seconds. Add Part 3 (powder) pouring slowly over a period of 20 seconds. DO NOT DUMP POWDER INTO RESIN, ADD GRADUALLY. Allow Part 3 to further blend for 2-1/2 more minutes after all of the powder is emptied into the resin to ensure all powder is wetted out and a completely uniform mix is achieved. During the mixing operation, and observing good safety practices, ie turning off and removing revolving parts, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete blending of Parts 1+2+3. Do not attempt to attend to unmixed material that may gather on the sides of the mixing container while mechanical or electrical parts are in motion.

Immediately discharge the product and place material on substrate to be coated. Mix subsequent batches immediately.

Note: Do not mix more material than can be applied within the working time limits (i.e., Pot Life) at the actual field temperature.

Prior to application, measure and confirm substrate moisture content, ambient relative humidity, ambient and surface temperature and dew point. During installation, confirm and record above values at least once every three (3) hours, or more frequently whenever conditions change (e.g., ambient temperature rise/fall, relative humidity increase/decrease, etc.).

Cold substrates: Any application attempted at material, ambient, and substrate temperatures below 18°C ​​(65°F) will result in reduced product workability and a slower curing rate.

Substrate priming is normally not required under typical circumstances. However, due to variations in concrete quality, surface condition, surface preparation, and ambient conditions, it is recommended to conduct baseline tests on application areas to determine if a primer is necessary to prevent blistering, peeling, pitting, and other aesthetic variations. The standard primer application procedure consists of a 15- to 20-mil tack coat of Sika® Ucrete® TC31 NA, followed by a light dusting of dry quartz sand. This method is preferred for concrete substrates.

Standalone Coating

Apply two (2) coats of Sika® Ucrete® 33 NA at 10 mil w.f.t. per coat to the substrate using a short or medium nap roller. Work the resin well into the surface, making sure the floor is fully wetted and then rolll back lightly with the roller to the required thickness.

Broadcast Textured Coating

Apply a body coat of Sika® Ucrete® 33 NA at a thickness of 10 mil w.f.t., immediately broadcast the wet coating to rejection with mineral aggregates (selected for texture). Once the broadcast body coat has dried sufficiently to allow foot traffic, sweep-up and vacuum the loose unbonded aggregate. Apply a top coat at a thickness of 10 mil w.f.t.using a squeegee followed by backrolling to provide a uniform texture and finish.

Top Coat for Sika® Ucrete® HS22 NA

When a Sika® Ucrete® HS22 NA mortar has been installed amd a topcoat is to be applied. Apply a 0.25 mm (10 mil) e.f.m. layer of Sika® Ucrete® 33 NA using a short-pile roller. Smooth the material by rolling it to encapsulate the aggregates and seal the surface.

Important: Maintain a 'wet-edge' to avoid lap marks. Over-rolling and delays in the installation of mixed material may cause inconsistencies with visible lap marks in the finished floor. Beware of accelerated cure rates when applying at elevated substrate and ambient temperatures. Maintain consistent thickness throughout the entire area. Gloss levels and visual appearance may vary depending on thickness of material applied.

Clean all tools and equipment with a non-flammable solvent. Once hardened, product can only be removed mechanically.

Sika® Ucrete® floors are easily cleaned using a stiff brushing action and or high-pressure water, preferably hot, and even live steam.  Degreasing agents and detergents will assist, but do not use any compounds containing Phenol as the floor colour may be irreparably affected. Consult the cleaning compound manufacturer’s instructions before use.