Sikafloor®-33 NA PurCem®

Sikafloor®-33 NA PurCem® is state-of-the-art, UV resistant, fine textured, high-build coating with a matte finish, based upon pthalate-free, water-dispersed aliphatic polyurethane/cement and aggregate technology.

It is designed as a standalone coating for concrete and as a top coat for Sikafloor® NA PurCem® systems. It is new technology that significantly improves colour fastness, virtually eliminating the yellowing commonly associated with light coloured, conventional aromatic polyuretane/cement products. It also provides a higher performing sealed surface with excellent chemical, very good abrasion, and enhanced mechanical resistance. Sikafloor®-33 NA PurCem® represents superior polyurethane/cement technology, combining easier application, resistance to blistering and improved performance.

Recommended uses

Sikafloor®-33 NA PurCem® is primarily used as a chemically resistant high build coating used to protect horizontal and vertical concrete substrates, but is equally effective over Sikafloor®-19 NA PurCem®, Sikafloor®-20 NA PurCem®, Sikafloor®-22 NA PurCem®, and Sikafloor®-29 NA PurCem®. Typically used in food processing plants, chemical storage areas, warehouses, washrooms, laboratories, food preparation areas and chemical process plants.

Features

• Can be applied onto 7 to 10 day old concrete after adequate preparation and where substrate has tensile bond strength in excess of 1.5 MPa (218 psi).
• Versatile material suitable for application as a UV resistant, standalone coating and top coat for other PurCem systems.
• Longer pot life permits increased productivity with less waste.
• Resists a very wide range of organic and inorganic acids, alkalis, amines, salts and solvents. Consult Sika Canada for full details. Refer to the Sikafloor® PurCem® Chemical Resistance Chart.
• Similar coefficient of thermal expansion to concrete allowing movement with the substrate through normal thermal cycling.
• Performs and retains its physical characteristics through a wide temperature range from -10 °C (14 °F) up to 90 °C (194 °F).
• Superior formulation eliminates formation of blisters, such as those arising out of application during elevated temperatures or early and multiple layer applications.
• Bond strength in excess of the tensile strength of concrete, concrete will fail first.
• Non-taint, odourless and phthalate-free, avoiding associated toxicity to health and environmental hazards.
• Behaves plastically under impact; deforms but will not crack or debond.
• Excellent long term wear resistance from a two-coat application.
• Easily maintained using commonly employed methods and phenol-free detergents.
• Achieves highest performance ratings according to ASTM G21 resistance to fungi and ASTM D3273 resistance to mould growth.

Packaging

48.72 kg (107.4 lb) - 33.83 L (8.94 US gal) unit Consists of 3 Components: A + B + C Part A:   8 x 1.93 kg (4.25 lb) foil pouches in a cardboard box. Part B:   8 x 2.23 kg (4.91 lb) foil pouches in a card board box. Part C:   8 x 1.93 kg (4.25 lb) in plastic pails. NOTE: A 48.72 kg (107.4 lb) unit will produce 8 x 6.09 kg (13.42 lb) mixes.

ENVIRONMENTAL INFORMATION

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.

APPROVALS / CERTIFICATES

Meets the requirements of CFIA and USDA for use in food plants. CAN/ULC S102.2: Standard Method of Test for Surface Burning Characteristics of Flooring Materials Flame Spread Rating (FSR): 0 Smoke Developed Classification (SDC): 30

Shelf Life

12 months in original unopened packaging.

Storage Conditions

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

Density

~1.44 kg/L  (~11.99 lb/US gal.) (ASTM C905)

Volatile organic compound (VOC) content

A+B+C = ~5 g/L

Shore D Hardness

~81 (ASTM D2240)

Abrasion Resistance

~0.08 g   (~0.003 oz)  CS-17 / 1000 cycles / 1000 g (2.2 lb) ~0.153 g (~0.005 oz)   H-22  / 1000 cycles / 1000 g (2.2 lb) (ASTM D4060)

Tensile Strength in Flexure

~31.8 MPa (~4613 psi) (ASTM C580)

Tensile Strength

~15.38 MPa (~2231 psi) (ASTM C307)

Shrinkage

~0.225 % (ASTM C531)

Pull-Off Strength

> 3.0 MPa (> 435 psi) (substrate failure) (ASTM D7234)

Chemical Resistance

Consult Sika Canada.

Microbiological Resistance

Resistance to Fungi Growth Rated 0 (no growth) (ASTM G21) Resistance to Mold Growth Rated 10 (highest resistance) (ASTM D3273)

Skid / Slip Resistance

~0.60 wet (smooth) (ANSI A137.1 / ANSI A326.3) DCOF - BOT 3000e

Indentation

~0 % (MIL-PRF-24613)

Service Temperature

Minimum -10 °C (14 °F)  / Maximum  90 °C (194 °F) continuous service temperature as a standalone coating. As a top coat onto Sikafloor® NA PurCem® mortars, please refer to the most recent specific mortar Product Data Sheet.

Softening Point

~130 °C (~266 °F)

Mixing Ratio

Components A: B: C = A x 1 : B x 1: C x 1  (per mix)

Product Temperature

Condition product between 18 °C to 24 °C (65 °F to 75 °F) before use. 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 workabitity and slower cure rates.

Ambient Air Temperature

Minimum 7 °C (45 °F)  /  Maximum  38 °C (100 °F)

Relative Air Humidity

Maximum 85% (during application and curing)

Dew Point

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 be lower than the ambient temperature.

Substrate Temperature

Minimum 7 °C (45 °F)  /  Maximum  38 °C (100 °F) Do not apply while ambient and substrate temperatures are rising, as pinholes may occur. Ensure there is no vapour drive at the time of application. Refer to ASTM D4263, may be used for a visual indication of vapour drive.

Substrate Moisture Content

Sikafloor®-33 NA PurCem® can be applied on substrates with higher moisture content.  Check for rising moisture. The substrate must be visably dry with no ponding water and must have a minimum pull-off strenght of 1.5 MPa (218 psi). IMPORTANT: Early application on green or young concrete before drying shrinkage has stabalized may result in reflective cracks on the finished Sikafloor®-33 NA PurCem® surface post application.

Pot Life

~20 minutes

Curing Time

Foot traffic ~24 hours Light traffic ~30 hours Normal traffic (full cure) ~5 days at 20 °C (68 °F) and 50 % R.H. Curing times will vary according to air and substrate temperature and relative humidity. Protect from dampness, condensation from pipes or any overhead leaks and water contact during the initial 24 hour cure period. Mechanical, chemical and physical properties will be fully achieved at full cure.

Consumption

Sikafloor®-33 NA PurCem® 1 x 6.09 kg mix (13.42 lb mix) consisting of: 1 Part A foil pouch + 1 Part B foil pouch + 1 Part C plastic pail 8.8 m 2 to 17.6 m 2 per 6.09 kg mix (95 ft 2 to 190 ft2 per 13.42 lb mix) at 10 mils to 20 mils  w.f.t. per coat NOTE: A Sikafloor®-33 NA PurCem® 48.72 kg (107.4 lb) unit will produce 8 x 6.09 kg (13.42 lb) mixes. Actual coverage rates and material consumption will depend upon porosity and profile of substrates.  Allowance must be also 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.

SUBSTRATE PREPARATION

Concrete surfaces must be clean and sound. Remove all dust, dirt, existing paint films, efflorescence, exudates, laitance, form oils, hydraulic or fuel oils, brake fluid, grease, fungus, mildew, biological residues or any other contaminants which may prohibit good bond. Prepare the surface by any appropriate mechanical means, in order to achieve a profile equivalent to ICRI / CSP 3. 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 (218 psi) in tension at the time of application. Repairs to cementitious substrates, filling of blowholes, leveling of irregularities, etc. should be carried out using an appropriate Sika® profiling mortar. Contact Sika Canada for recommendations.

CLEAN UP

Clean all tools and equipment with Sika® Urethane Thinner and Cleaner. Once hardened, product can only be removed mechanically.

Cure time

Foot traffic ~24 hours at 20 °C (68 °F) Light traffic ~30 hours and 50 % R.H. Normal traffic (full cure) ~5 days

Application temperature

Minimum 7 °C (45 °F) / Maximum 38 °C (100 °F)