Sika® Ucrete® UD 200

• Contributes towards satisfying LEED® v4 EQ Credit - Low-Emitting Materials

Water-dispersed polyurethane-cement hybrid

Always refer to the best-before date of the individual packaging.

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

Sika®Ucrete® systems offer exceptional resistance to a wide range of chemical aggressors. For example, Sika® Ucrete® UD 200 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® UD 200 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 7 °C (45 °F) / maximum 30 °C (86 °F)

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® UD 200 can be applied on substrates with higher moisture content. Check for rising moisture. The substrate must be visibly dry without standing water. 

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

Concrete surfaces must be clean and sound. The compressive strength of the concrete substrate should be at least 35 MPa (4350 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® UD 200.

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 1:2:3:4 = 1 (one) x Part 1 : 1 (one) x Part 2 : 1 (one) x Part 3 : 1 (one) x Part 4

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 Part 1, Part 2 and Part 4, 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+4. 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.).

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.

Spread mix evenly and close with a clean steel trowel. Install to a thickness between 6 mm up to 13 mm (1/4 in up to 1/2 in) depending on requirements. 

Immediately after troweling, back rolling of a short nap roller will provide a more even finish. The roller should not pass over the surface more than twice.

Notes:

• Do not use a short nap roller to flatten out the surface of a poorly troweled floor. Do not back-roll into partially cured material, as it will be visible in the floor finish.  Avoid excessive build up of resin on the roller by rolling out immediately in front of the wet edge, or on a piece of cardboard. 
• The use of a short nap roller will reduce the slip resistance and care should be taken that the correct degree of slip resistance versus ease of cleaning is produced in line with the end user's requirements. Excessive use of the roller can lead to the inclusion of air into the surface of the floor resulting in pinholes.

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.