Sika® Ucrete® HS22 NA

• Conformity with LEED®v4 IEQ Credit: Low-Emitting Materials

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

Meets CFIA requirements for use in food plants.

Water-dispersed polyurethane-cement hybrid

12 months in original unopened packaging

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

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® HS22 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® HS22 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.

~130 °C (~266 °F )

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

Note: Mixing and application attempted at material, ambient and/or substrate temperature conditions less than 18 °C (65 °F) will result in a decrease in product workability and slower cure rates.

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® HS22 NA can be applied on substrates with higher moisture content. Check for rising moisture. The substrate must be visibly dry without standing water.

Note: Mixing and applying the product when the material, ambient, and/or substrate temperatures are below 18°C ​​(65°F) will result in reduced workability and slower curing times.

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

Before applying Sika® Ucrete® HS22 NA when a scratch primer with broadcast is used, allow for the following waiting times: 

Primer: (where surface/substrate porosity requires such)
1 x 5.5 kg mix of Sika® Ucrete® TC31 NA consisting of:

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

~15.3 m² per g mix  (~165 ft² ) at 10 mil w.f.t.

Note: Refer to the most current Sika®Ucrete® TC31 NA product data sheet for specific information.

or Scratch Coat: (where surface/substrate profile requires such)
1 x 27.12 kg mix of Sika® Ucrete® HS22 NA consisting of:

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

~13 m² per 27.12 kg mix (~140 ft²) at 1 mm (40 mil) w.f.t.

Screed:

1 x 27.12 kg mix of Sika® Ucrete® HS22 NA consisting of:

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

~2.9 m² per 27.12 kg mix (~31.6 ft² ) per 59.79 lb mix) at 4.5 mm (3/16 in) w.f.t.

~2.1 m² per 27.12 kg mix (~23.2 ft²) at 6 mm (1/4 in) w.f.t.

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 the 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® HS22 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 (note: ICRI CSP 6 will provide better overall performances where high shear stress from dynamic loads may be present or that can reasonably be expected).

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.

Edge Terminations

All free edges of a Sika® Ucrete® floor, whether at the perimeter, along gutters or at drains require extra anchorage to distribute mechanical and thermal stresses. This is best achieved by forming or cutting grooves in the concrete. Grooves should have a depth and width of 2 times the thickness of the Sika® Ucrete® floor. 

If necessary, protect all free edges with mechanically attached metal strips. Do not featheredge, always turn into an anchor groove.

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 = 2 (two) x Part 1 : 2 (two) 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 to 24°C (65 °F to 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. 

A Ted Baugh type mixer, incorporating a motor spun mixing pail and a shear angle mixing blade, is recommended.  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.

Cool Substrates: Cold substrates: Improved flowability on cold substrates and at low ambient temperatures (below 18°C ​​[65°F]) can be achieved by removing a maximum of 3.0 kg (6.6 lb) of Part 3 (powder) per unit. However, a longer curing time should be expected.

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: Application attempted at material, ambient and substrate temperatures below 18°C (65°F) will result in a decrease in product workability and slower cure rates.

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.

Solid Colour Broadcast Surfacing

Broadcast Body Coat

Pour mortar onto surface and spread to appropriate thickness using a notched squeegee, trowel or screed bar. Take care to spread newly mixed materials across the transition of previous applied mixes before the surface begins to set. Immediately spike roll the surface to release trapped air in the matrix. Sika® Ucrete® HS22 NA requires selected mineral aggregates (selected for texture) to be broadcast on to the wet surface to  rejection. Ensure complete aggregate coverage to all areas to avoid bald spots.

Top Coat 

Once the broadcasted body coat has sufficiently cured to allow foot traffic, sweep-up and vacuum the loose unbonded sand. Apply a top coat of Sika®Ucrete® TC31 NA or Sika®Ucrete® 33 NA to lock in the aggregate, using a squeegee, followed by backrolling to provide a uniform texture and finish. This application method requires a minimum 24 hours cure period at 20 °C (68 °F) before foot traffic, refer to the respective Product Data Sheet.  

Multi-Colour Broadcast Surfacing (SLQ)
Broadcast Body Coat

Pour mortar onto surface and spread to appropriate thickness using a notched squeegee, trowel or screed bar. Take care to spread newly mixed materials across the transition of previous applied mixes before the surface begins to set. Immediately spike roll the surface to release trapped air in the matrix. Broadcast Sikafloor® Broadcast Quartz Aggregate on to the wet surface to rejection. Ensure complete aggregate coverage to all areas to avoid bald spots.

Top Coat

  
Once the broadcasted body coat has sufficiently cured to allow foot traffic, sweep-up and vacuum the loose unbonded sand. Apply a top

coat of Sikafloor®-510N LPL Clear to lock in the aggregate, using a squeegee, followed by back rolling to provide a uniform texture and finish. This application method requires a minimum 8 hours cure period at 20 °C (68 °F) before light traffic, see Sikafloor®-510N LPL Product Data Sheet.

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.