Sikafloor®-29 NA PurCem®
ADVANCED GENERATION, HIGH STRENGTH POLYURETHANE/CEMENT COVING AND DETAILING MORTAR
Sikafloor®-29 NA PurCem® is a state-of-the–art, vertical grade, phthalate-free, water-dispersed polyurethane-based/cement and aggregate mortar applicable at thicknesses ranging from 3 to 6 mm (1/8 to 1/4 in). It is designed for use in vertical detailing and coving works to provide excellent resistance to abrasion, impact, chemical attack, and other physical aggression and has fine aggregate, smooth surface texture. Sikafloor®-29 NA PurCem® represents superior polyurethane/cement technology, combining easier application, resistance to blistering and improved performance.
- Applicable 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).
- Designed specifically for trowel application to vertical surfaces and at wall/floor junctions.
- 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 retain its physical characteristics through a wide temperature range from -40 °C (-40 °F) up to 120 °C (248 °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.
- 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 mold growth.
Usage
- Sikafloor®-29 NA PurCem® is primarily used to protect vertical concrete substrates, but is equally effective over most steel surfaces that have been properly prepared and supported.
- Food processing plants, wet and dry process areas, freezers and coolers, commnercial kitchens, dairies, breweries, wineries, distilleries, laboratories, chemical process plants, pulp and paper plants, warehouses and storage areas.
Advantages
- Applicable 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).
- Designed specifically for trowel application to vertical surfaces and at wall/floor junctions.
- 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 retain its physical characteristics through a wide temperature range from -40 °C (-40 °F) up to 120 °C (248 °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.
- 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 mold growth.
Packaging
202.64 kg (446.74 lb) - 95.14 L (20.93 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 1.66 kg (3.66 lb) foil pouches in a card board box.
Part C: 8 x 21.74 kg (47.93 lb) multi-wall paper bags.
NOTE: A 202.64 kg (446.74 lb) unit will produce 8 x 25.33 kg (55.84 lb) mixes
Colour
RAL 3009 Oxide Red, RAL 7038 Agate Grey, Sika® Medium Grey (Formely Telegrey 2), RAL 1001 Beige, RAL 5005 Signal Blue.
Special colours (on request). Refer to current price list for availability.
Product Details
ENVIRONMENTAL INFORMATION
- 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
APPROVALS / CERTIFICATES
- Meet the requirements of CFIA and USDA for use in food plants.
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
| ~2.13 kg/L (~17.75 lb/US gal.) | (ASTM C905) |
Volatile organic compound (VOC) content
A+B+C = ~5 g/L
Shore D Hardness
| ~85 | (ASTM D2240) |
Abrasion Resistance
| ~0.17 g (~0.006 oz) CS-17 / 1000 cycles / 1000 g (2.2 lb) ~2.65 g (~0.09 oz) H-22 / 1000 cycles / 1000 g (2.2 lb) | (ASTM D4060) |
Resistance to Impact
| ~9.08 joules (~6.70 ft*lb) | ASTM D2794 |
Indentation
| ~0 % | (MIL-PRF-24613) |
Compressive Strength
| 24 hours | ~25 MPa (~3626 psi) |
| 3 days | ~33 MPa (~4786 psi) |
| 7 days | ~34 MPa (~4931 psi) |
| 28 days | ~35 MPa (~5076 psi) |
Tensile Strength in Flexure
| ~9.8 MPa (~1421 psi) | (ASTM C580) |
Tensile Strength
| ~3.89 MPa (~564 psi) | (ASTM C307) |
Pull-Off Strength
| > 3.0 MPa (> 435 psi) (substrate failure) | (ASTM D7234) |
Shrinkage
| ~0.147 % | (ASTM C531) |
Coefficient of Thermal Expansion
| ~2.6 x 10-5 mm/mm/°C (~1.44 x 10-5 in/in/°F) | (ASTM D696) |
Service Temperature
Minimum -40 °C (-40 °F) / Maximum 120 °C (248 °F)
Softening Point
~130°C (~266°F)
Thermal Compatibility
| Pass | ASTM C884 |
Water Absorption
| ~0.16% | ASTM C413 |
Chemical Resistance
Consult Sika Canada
Microbiological Resistance
| Resistance to Fungi Growth | Rated 0 (no growth) |
| (ASTM D3273 |
Application
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®-29 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®-29 NA PurCem® surface post application.
Pot Life
~25 minutes
Curing Time
| at 20 °C (68 °F) and 50 % R.H. 6 mm (1/4 in) |
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® Vertical Epoxy Primer:
Approx. 4 m2/L (160 ft2/US gal.) ~10 mil w.f.t.
Sikafloor®-29 NA PurCem® Mortar:
1 x 25.33 kg mix (55.84 lb mix) consisting of:
1 Part A foil pouch + 1 Part B foil pouch + 1 Part C multi-wall paper bag
~3.6 m2 per 25.33 kg mix (~39 ft2 per 55.84 lb mix) at 3 mm (1/8 in) w.f.t.
~1.8 m2 per 25,33 kg mix (~19.5 ft2 per 55.84 lb mix) at 6 mm (1/4 in) w.f.t.
NOTE: A 202.64 kg (446.74 lb) unit will produce
8 x 25.33 kg (55.84 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.
MIXING
Mix Ratio: Components A:B:C (A x 1 : B x 1 : C x 1)
Do not hand mix Sikafloor® PurCem® 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 (eg. 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 Components A and B separately, making sure all solids, including pigments, are uniformly distributed. Start mixer; add Component A and Component B, blending for 30 seconds. Add Component C (powder) pouring slowly over a period of 20 seconds. DO NOT DUMP POWDER INTO RESIN, ADD GRADUALLY. Allow Component C 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 Components A + B + C. 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.
Cool 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.
APPLICATION
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.).
Primer
Prepare and apply Sikafloor® Vertical Epoxy Primer at a rate of approximately 4 m2/L (160 ft2/US gal.) ~10 mil w.f.t. using a brush or roller to provide uniform coverage. Primer must be tacky during the application of Sikafloor®-29 NA PurCem® mortar. Only mix and apply enough primer that can be overlaid before it cures (approximately 1 hour at 20 °C / 68 °F). If the primer becomes glossy or loses tackiness, remove any surface contaminants then recoat with additional Sikafloor® Vertical Epoxy Primer.
Sikafloor®-29 NA PurCem® Mortar
Place and spread Sikafloor®-29 NA PurCem® onto vertical surfaces using steel trowels, ensuring the mortar is well compacted onto the primer and within itself. Bottle coves and other shaped fillets at wall/floor junctions can be achieved using the appropriate tools. A light brushing of the surface of the mortar, while it is still workable, will close any surface voids. Allow a minimum 18 hours cure period at 20 °C (68 °F) before exposure to light contact, five (5) days before exposure to normal mechanical elements.
Important: 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.
CLEAN UP
Clean all tools and equipment with Sika® Urethane Thinner and Cleaner. Once hardened, product can only be removed mechanically.
