Sikafloor®-22 NA PurCem®

SELF-LEVELING BROADCAST CEMENTITIOUS URETHANE SLURRY

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Sikafloor®-22 NA PurCem® is a self-leveling, solid color, three component, cementitious urethane Mortar designed to provide excellent resistance to abrasion, impact, and chemical attack. Sikafloor®-22 NA PurCem® is broadcast with dried quartz sand and sealed with Sikafloor 31NA PurCem to produce a solid color finish, or can be broadcasted with colored quartz aggregate and sealed with Sikafloor resinous flooring products for a decorative finish. The system is typically installed at 3/16'' to 1/4'' (188 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 -22 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 3/16 to 1/4 inch (188 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 22NA PurCem is primarily used to protect concrete substrates in aggressive environments.
Food processing plants, wet and dry process areas, kitchen and oven areas, freezers and coolers, dairies, breweries, wineries, distilleries, laboratories, chemical process plants, pulp and paper plants, warehouses and storage areas and pharmaceutical facilities.

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 -22 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 3/16 to 1/4 inch (188 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 :	1 US gallon Pail(3.78 L) (8.53 lb)
Component B :	0.7 US gallon Pail (2.64 L) (7.33 lb)
Component C:	43.96 lbs.(19.94 kg) in a bag (powder)
kits (A+B+C):	59.83 lbs (27.14 kg)

Color

RAL 7012 Basalt Gray
RAL 3009 Oxide Red
RAL 7038 Agate Gray
RAL 1001 Beige
RAL 7042 Traffic Grey

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

16.84 lb/US gal. (2.02 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

5.02 ft - lb (6.81 joules)

at 1/8'' (3 mm) of thickness

ASTM D2794

at 73°F (23°C) and 50% R.H

Abrasion Resistance

CS-17/1,000 cycles/1,000 g -0.110g
H-22/1,000 cycles/1,000 g -2.26g

ASTM D4060

at 73°F (23°C) and 50% R.H

Compressive Strength

5,657 Psi (39 MPa)

28 days

ASTM C579

at 73°F (23°C) and 50% R.H:

Flexural Strength

2,790 psi (8.9 MPa)

ASTM C580

at 73°F (23°C) and 50% R.H

Tensile Strength

1,045 psi (6.5 MPa)

ASTM C307

at 73°F (23°C) and 50% R.H

Tensile Adhesion Strength

254 psi (> 1.75 MPa)

(substrate failure) Pull -off Strength

ASTM D4541

at 73°F (23°C) and 50% R.H

Coefficient of Thermal Expansion

0.89 x 10⁵ in/in/ºF (1.6 x10⁵ mm/mm/ºC)

ASTM D696

at 73°F (23°C) and 50% R.H

Coefficient of Friction

0.69

ANSI 326.3

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

Water Absorption

0.10%

ASTM C413

at 73°F (23°C) and 50% R.H

Thermal Resistance

Pass	ASTM C884 at 73° F (23° C) and 50% RH

Service Temperature

-40°F (- 40°C) min./248°F (120°C) max.

Softening point

266°F (130°C)

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)	~ 25 - 30 minutes
+68°F (20°C)	~ 15 - 20 minutes
+86°F (30°C)	~ 5 -10 minutes

Cure Time

Temperature:	Foot traffic	Light traffic	Full cure
+50°F (10°C)	~ 24 hours	~ 6 days	~ 10 days
+68°F (20°C)	~ 12 hours	~ 4 days	~ 7 days
+86°F (30°C)	~ 6 hours	~ 2 days	~ 5 days

Reduced cure times may be achieved by using Sikafloor 15NA Accelerator. See the Sikafloor 15NA product data sheet for complete use and mixing information.

Waiting / Recoat Times

Before applying Sikafloor®-22 NA PurCem® when a Scratch primer is used allow;

Substrate Temperature	Minimum	Maximum
+50°F (10°C	24 hours	7 days
+68°F (20°C)	6 hours	72 hours
+86°F (40°C)	4 hours	24 hours

Consumption

Coverage

Approx. 37 ft2 (3.4m2) per unit at 160 mils (4.mm)

Approx. 31 ft2 (2.8 m2) per unit at 3/16” (4.7 mm)

Approx. 25 ft2 (2.3 m2) per unit at 1/4” (6.3 mm)

(The above figures do not allow for surface porosity, profile or waste).

Application steps

MIXING

Mix Ratio Components A : B : C = 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 60 - 70ºF (15 - 21ºC). Premix Components A and B separately, make sure all pigment is evenly distributed. Pour Components A into a clean mixing bucket, 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 a further 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).

Note: Improved flowability on cool substrates can be achieved by removing a maximum of 2.2 lb (1.0 kg) of Component C (powder) per unit.
Do not mix more material than can be applied within the working time limits (i.e. Pot Life) at the actual field temperature.

APPLICATION

Scratch Coat

Typically not required (see priming instructions)
Body Coat: Priming of concrete substrates is not usually required under typical circumstances. However, due to variations in concrete quality, surface conditions, surface preparation and ambient conditions, reference test areas are recommended to determine whether priming is required to prevent the possibility of blisters, debonding, pinholes and other aesthetic variations.

Mix and pour the Sikafloor®-22 NA PurCem® materials on the floor. Spread to the desired thickness (160 mils - 1/4”) using a screed gauge rake or trowel. 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.

Sikafloor®-22 NA PurCem® requires the wet surface to be broadcast to rejection with quartz or mineral aggregates. Aggregate must fall vertically to avoid surface defects / do not broadcast up to the transition line of new mixes, always broadcast 2 - 3 feet beyond the wet edge. Allow broadcast surface to cure sufficiently to be able to resist foot traffic without damaging the surface. Remove excess aggregate by sweeping or vacuuming until surface is free of all loose particles and dust.

A topcoat of Sikafloor 31NA PurCem can be applied to lock in the aggregate. Allow a minimum 24 hour cure period at 68ºF (20ºC) before light traffic after the Sikafloor 31NA PurCem is applied. Please refer to the individual most current and respective Product Data Sheet for specific and detailed information.