Product Data Sheet
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Sikafloor®-19 NA PurCem®

Sikafloor®-19 NA PurCem®

TROWEL APPLIED CEMENTITIOUS URETHANE MORTAR

Sikafloor®-19 NA PurCem® is a trowel grade, solid color, three-component, water dispersed polyurethane based cement and aggregate mortar, designed to provide excellent resistance to abrasion, impact, chemical attack and other physical aggression. Sikafloor®-19 NA PurCem® can be textured aggregate surface providing moderate slip resistance. Sikafloor®-19 NA PurCem® Broadcast can be broadcasted with aggregate texture for increased slip resistance. Both systems are typically installed at 1/4" to 3/8'' (250 to 375 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 -19 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  1/4" to 3/8' (250 to 375 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.
 
Product Data Sheet
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Usage

  • Sikafloor®-19 NA PurCem® is primarily used to protect concrete substrates in severe environments.
  • Typically used in food processing plants, wet and dry process areas, freezers and coolers, thermal shock areas, 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 -19 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  1/4" to 3/8' (250 to 375 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: 

(2) 39.66 lb.(18.02 kg) per bag

kits (A+B+2C):  95.18 lb (43.17 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 + C: 12 months in original unopened packaging.

Storage Conditions

Store dry between 50 °F and 75 °F (10–25 °C). Protect from freezing

Density

17.8 lb./US gal. (2.14 kg/L)  

ASTM C905

at 73° F (23° C) and 50% R.H:

  

Volatile organic compound (VOC) content

5 g/l

Components A+B+C:
Technical Information

Shore D Hardness

82

 ASTM D2240

at 73° F (23° C) and 50% RH

Indentation

~ 0%

MIL-PRF -24613

at 73° F (23° C) and 50% R.H

Impact Strength

4.18 ft/lb  (5.67 joules) at 1/8'' (3mm) of thickness

ASTM D2794

at 73° F (23° C) and 50% R.H

Abrasion Resistance

CS-17/1,000 cycles/1,000 g -0.155 g loss
H-22/1,000 cycles/1,000 g -2.18 g loss

ASTM D4060

at 73° F (23° C) and 50% R.H:

Compressive Strength

6,050 psi (41.7 MPa) 28 days

ASTM 579

at 73° F (23° C) and 50% RH

Flexural Strength

1,572 psi (10.8 MPa)

 6.29 x 105 psi (4.34 x 103 MPa)

Flexural Modulus

Tensile Strength

540 psi (3.7 MPa)

ASTM C307

at 73° F (23° C) and 50% RH

400 psi (>2.5 MPa) (Substrate failure)

Pull- off Strength

ASTM D4541

at 73° F (23° C) and 50% RH

Tensile Adhesion Strength

> 400 psi (> 2.5 MPa)

(substrate failure)    

(ASTM D-4541)

at 73° F (23° C) and 50% RH

Coefficient of Thermal Expansion

1.06 x 105 in/in/ºF

(1.9 x 105 mm/ mm/ºC)

ASTM D696

at 73° F (23° C) and 50% RH

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

0.28%

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) up to 248°F (120°C)

Softening point

266°F (130°C)

Application

Application Information

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

Waiting / Recoat Times

Before applying Sikafloor®-19 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 hours24 hours
Consumption

Coverage

Approx. 34 ft2 (2.8 m2) per unit at 1/4” (6 mm)

Approx. 22 ft2 (1.8 m2) per unit at 3/8” (9 mm)

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

MIXING

Mix Ratio: Components A : B : C (“C” Consist of two bags of 39.66 lbs each) = 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 - 75ºF (18 - 24ºC). Premix Component A,make sure all pigment is evenly distributed. Pour Components A and B 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 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)

                
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

Sikafloor®-19 NA PurCem®: trowel grade materials are applied with standard steel plastering or cement-finishing trowel 12 x 4 in (30 x 10 cm). Do not use serrated hand trowels. Pour the material from the mixing pail, working to terminations or along the wet edge of previous pours.

                     

Using considerable top pressure on the trowel, spread material from side to side, pushing back into the previous mix (wet edge), pulling forward to establish the thickness and then, with a lighter pressure, trowel from side to side to close up. The last few strokes should always be in one direction only, left to right or right to left, but never back and forth.

                                

Excessive trowelling will bring the resin to the surface reducing the anti-slip surface. Screed box applicators may be used with Sikafloor®-19 NA PurCem® It is recommended to not use screed boxes greater than 24-inch width. Mix and apply materials as outlined above in Mixing and Application. Sikafloor®-19 NA PurCem® Broadcast requires quartz color aggregate to be broadcast on to the wet surface.

                                                              

Evenly distribute the matching solid color aggregate by hand, covering all areas to avoid bald spots. Allow a minimum 10 hours cure at 68°F (20°C) before foot traffic. Alternatively, selected mineral aggregates can be broadcast on to the wet surface and sealed with a top coat of Sikafloor-31NA PurCem to lock in the aggregate. This application method requires a minimum 14 hours cure period at 68°F (20°C) before foot traffic, see Sikafloor-31NA PurCem Product Data Sheet.

 

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