Sikafloor®-29 NA PurCem®

HIGH STRENGTH CEMENTITIOUS URETHANE COVING,VERTICAL AND DETAILING MORTAR

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Sikafloor®-29 NA PurCem® is a vertical grade, three-component, solid color, water dispersed polyurethane based/cement and aggregate mortar used for detailing, vertical work and coving. It has a finely textured smooth aggregate appearance that provides excellent resistance to abrasion, impact, chemical attack and other physical aggression. System is typically installed to any height from at 1/8'' to 1/4'' (125 to 250 mils) thickness.

Can be applied on green concrete, typically 7-10 days. Full 28 days cure time is not necessary.
Can be applied over partially cured concrete substrates (> 4% mass (pbw –part by weight) as measured with Tramex® CME/CMExpert type concrete moisture meter surface moisture).
Can be applied to concrete substrates where <100 % relative humidity is measured as per ASTM F2170.
Substrate has tensile bond strength in excess of 218 psi (1.5 MPa). Substrate has tensile bond strength in excess of 218 psi (1.5 MPa).
Resists a very wide range of organic and inorganic acids, alkalis, amines, salts and solvents. Consult Sika Technical Service for full details. Refer to the Sikafloor -29 NA Purcem Chemical Resistance Chart.
Similar coefficient of thermal expansion to concrete allowing movement with the substrate through normal thermal cycling. It will perform and retain its physical characteristics through a wide temperature range from -40 °F (-40 °C) up to 248 °F (120 °C).
Steam cleanable at 1/8'' to 1/4'' (125 to 250 mils) thickness.
Non-tainting, odorless.
Behaves plastically under impact / deforms but will not crack or debond.
High abrasion qualities result from its aggregate structure.
Extra Expansion joints are not necessary; maintain and extend existing expansion joints up through the Sikafloor PurCem Flooring System.
Minimal maintenance costs, superior life cycle cost advantage versus tile.
Meets the requirements of USDA for use in food plants.

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Product Data Sheet Show all documents

Usage

Sikafloor-29NA PurCem is primarily used for vertical application of cove/cant on concrete substrates
Typically used in food processing plants, wet and dry process areas, freezers and coolers, dairies, breweries, wineries, distilleries, laboratories, chemical process plants, pulp and paper plants, warehouses and storage areas.

Advantages

Can be applied on green concrete, typically 7-10 days. Full 28 days cure time is not necessary.
Can be applied over partially cured concrete substrates (> 4% mass (pbw –part by weight) as measured with Tramex® CME/CMExpert type concrete moisture meter surface moisture).
Can be applied to concrete substrates where <100 % relative humidity is measured as per ASTM F2170.
Substrate has tensile bond strength in excess of 218 psi (1.5 MPa). Substrate has tensile bond strength in excess of 218 psi (1.5 MPa).
Resists a very wide range of organic and inorganic acids, alkalis, amines, salts and solvents. Consult Sika Technical Service for full details. Refer to the Sikafloor -29 NA Purcem Chemical Resistance Chart.
Similar coefficient of thermal expansion to concrete allowing movement with the substrate through normal thermal cycling. It will perform and retain its physical characteristics through a wide temperature range from -40 °F (-40 °C) up to 248 °F (120 °C).
Steam cleanable at 1/8'' to 1/4'' (125 to 250 mils) thickness.
Non-tainting, odorless.
Behaves plastically under impact / deforms but will not crack or debond.
High abrasion qualities result from its aggregate structure.
Extra Expansion joints are not necessary; maintain and extend existing expansion joints up through the Sikafloor PurCem Flooring System.
Minimal maintenance costs, superior life cycle cost advantage versus tile.
Meets the requirements of USDA for use in food plants.

Packaging

Component A:	0.5 US gal (1.89 L) 4.25 lb (1.94 kg)
Component B:	0.35 US gal (1.32 L) 3.65 lb (1.66 kg)
Component C:	47.92 lbs (21.74 kg) in a bag (powder)
Components A+B+C:	A+B+C: 55.82 lb (25.31 kg)

Color

RAL 7012 Basalt Gray

RAL 7038 Agate Gray

RAL 7042 Traffic Grey

RAL 3009 Oxide Red

RAL 1001 Beige

Product Details

Product Information

Shelf Life

Components A+B: 1 year in original unopened packaging

Component C: 6 months in original unopened packaging

Storage Conditions

Store dry between 50°- 77°F (10°- 25°C). Protect from freezing.

Density

17.53 lb/US gal. (1.40 kg/L)

ASTM C905

at 73°F (23°C) and 50% R.H

Volatile organic compound (VOC) content

5 g/L

(A+B+ C Combined)

Technical Information

Shore D Hardness

80 - 85

ASTM D2240

at 73°F (23°C) and 50% R.H

Indentation

~ 0%	MIL -PRF -24613 at 73°F (23°C) and 50% R.H

Impact Strength

6.70 ft - lb (9.08 joules)
at 1/8” (3 mm) of thicknesss

ASTM D2794

at 73°F (23°C) and 50% R.H

Abrasion Resistance

CS-17/1,000 cycles/1,000 g (2.2 lb) -0.09 g

(-0.0031 oz)

H-22/1,000 cycles/1,000 g (2.2 lb) -4.01 g

(-0.141 oz)

Compressive Strength

2,901 psi (20 MPa) 24 hrs

ASTM C579

at 73°F (23°C) and 50% R.H

Flexural Strength

8.1 MPa (1175 psi)

ASTM C580

at 73°F (23°C) and 50% R.H

>254 psi (1.75 MPa) (substrate failure)

Pull-off Strength

ASTM D4541

at 73°F (23°C) and 50% R.H

Tensile Strength

2.5 MPa (363 psi)

ASTM C307

at 73°F (23°C) and 50% R.H

Coefficient of Thermal Expansion

0.72 x 10-5 n/in/°F (1.3 x 10-5 mm/mm/°C)

ASTM D696

at 73°F (23°C) and 50% R.H

Chemical Resistance

Please consult Sikafloor Technical Services.

Microbiological Resistance

Resistance to Fungi Growth Rated 0

(no growth)

ASTM G21

at 73°F (23°C) and 50% R.H

Resistance to Mold Growth Rated 10

(highest resistance)

ASTM D3273

at 73°F (23°C) and 50% R.H

Thermal Compatibility

Pass	ASTM C884 at 73°F (23°C) and 50% R.H

Water Absorption

0.16%

ASTM C413

at 73°F (23°C) and 50% R.H

Softening point

266°F (130°C)	at 73°F (23°C) and 50% R.H
Flow	0 in (0 mm)

Application

Application Information

Ambient Air Temperature

Minimum/Maximum 40˚/85˚F (4˚/30˚C).

Substrate Temperature

Minimum/Maximum 40˚/85˚F (4˚/30˚C).

Pot Life

Material Temperature	Time
+ 50°F (10°C)	~ 30 - 35 minutes
+ 68°F (20°C)	~ 20 - 25 minutes
+ 86°F (30°C	~ 10 - 15 minutes

Cure Time

Ambient & Substrate Temperature	Full cure
+ 50°F (10°C)	~ 10 days
+ 68°F (20°C)	~ 7 days
+ 86°F (30°C)	~ 5 days

Waiting / Recoat Times

Before applying sealer coat on Sikafloor-29NA PurCem allow

Substrate Temperature	Minimum	Maximum
+58°F (10°C)	24 hours	7 days
+68°F (20°C)	12 hours	3 days
+86°F (30°C)	6 hours	2 days

Consumption

Coverage

At 1/8 inch thick & 1 inch radius:
Cove height: 6 in = 25 linear ft
Cove height: 4 in = 30 linear ft
(The above figures do not allow for surface porosity, profile or waste)

Application steps

MIXING

Mix Ratio: Components A : B : C

Note: Mix full units only
A “kol” type mixer, incorporating a motor spun mixing pail and a shear angle mixing blade, or a forced action mixer is recommended. Mixing will be affected by temperature; condition materials for use to 65 - 75º F (18 - 24º C). Premix Components A and B separately, make sure all pigment is evenly distributed. Pour Components A into a clean mixing bucket/container large enough to accommodate the mix size quantity. and mix for 30 seconds. Add Component C (powder) pouring slowly over a period of 20 seconds.

Note: Do not dump powder into resin! Allow Component C to blend for an additional 2 1/2 minutes after all powder is emptied into the resin to ensure complete mixing and that all powders are evenly distributed. During the mixing operations, scrape down the sides and bottom of the container with a flat or straight edge trowel at least once to ensure complete mixing (Components A+B+C).

APPLICATION

Mix and apply Sikafloor®-29 NA PurCem® using steel trowels to spread and compact the mortar on vertical surfaces. Minimum of a 3/4'' radius cove trowel recommended. A light brushing while the mortar is still workable will close any surface voids. Allow a minimum 10 hour cure period at 68°F (20°C).Low level halogen light will assist in identifying trowel marks and waves while finishing the cove base.