Product Data Sheet Show all documents

Sikafloor®-328

2-Component Polyurethane part of the Sika ComfortFloor® system series

Sikafloor®-328 is a two part, solvent free, very low VOC emission, elastic, self-smoothing PUR resin.

  • Very low VOC emission
  • Solvent free
  • Permanently tough elastic
  • Good mechanical resistance
  • Easy to apply
  • Easy to maintain
 
Product Data Sheet Show all documents

Usage

  • Tough-elastic smooth wearing course for the Sika ComfortFloor® PS-27 flooring system
  • Particularly suitable for hospitals, schools, sales premises, showrooms, entrance halls, lobbies, open-plan offices, museums and light to medium heavy industrial use
  • For interior use only

Advantages

  • Very low VOC emission
  • Solvent free
  • Permanently tough elastic
  • Good mechanical resistance
  • Easy to apply
  • Easy to maintain
 

Packaging

Part A

15.8 kg containers

Part B

4.2 kg containers

Part A+B

20.0 kg ready to mix units

Colour

Resin - part A

coloured, liquid

Hardener - part B

light brown, transparent, liquid

10 Standard colours available: Grey white, beige, light grey, middle grey, dark grey, light blue, dark blue, light green, dark green, red.

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

LEED Rating

Sikafloor®-328 conforms to the requirements of LEED EQ Credit 4.2: Low-Emitting Materials: Paints & Coatings
SCAQMD Method 304-91 VOC Content < 100 g/l

APPROVALS / STANDARDS

  • Synthetic resin screed material according to EN 13813:2002, Declaration of Performance 02 08 01 04 040 0 000008 1041, certified by notified factory production control certification body 0620, and provided with the CE marking.
  • Coating for surface protection of concrete according to EN 1504-2:2004, Declaration of Performance 02 08 01 04 040 0 000008 1041, certified by notified factory production control certification body 0620, and provided with the CE marking.
  • Fire classification according to EN 13501-1, Test report 11-491, University of Ghent - Belgium
Product Information

Chemical Base

PUR

Shelf Life

12 months from date of production

Storage Conditions

The product must be stored properly in original, unopened and undamaged sealed packaging, in dry conditions at temperatures between +5 °C and +30 °C.

Density

Mixed resin

~ 1.57 kg/l

All Density values at +23 °C

Solid content by weight

~100 %

Solid content by volume

~100 %
Technical Information

Shore D Hardness

~60–70 (14 days / +23 °C)

(ISO 868)

Tensile Strength

~ 18.0 N/mm² (14 days / +23 °C)(DIN 53504)

Tensile Adhesion Strength

> 1.5 N/mm2 (failure in concrete)

(EN 13892-8)

Tear Strength

~ 75 N/mm (14 days / +23 °C)(ISO 34-1)

Chemical Resistance

Sikafloor®-328 always has to be sealed with Sikafloor®-305 W. Therefore, refer to chemical resistance of Sikafloor®-305 W.

Application

Application Information

Mixing Ratio

Part A : part B = 79 : 21 (by weight)

Layer Thickness

2.80 kg/m² - film thickness ~ 1.6 mm

Refer to the respective System Data Sheet.

Ambient Air Temperature

+10 °C min. / +30 °C max.

Relative Air Humidity

80 % r.h. max.

Dew Point

Beware of condensation!
The substrate and uncured floor must be at least 3 °C above dew point to reduce the risk of condensation or blooming on the floor finish.

Substrate Temperature

+10 °C min. / +30 °C max.

Substrate Moisture Content

< 4 % pbw moisture content.
Test method: Sika®-Tramex meter, CM - measurement or Oven-dry-method.
No rising moisture according to ASTM (Polyethylene-sheet).

Pot Life

Temperature

Time

+10 °C

~ 21 minutes

+20 °C

~ 15 minutes

+30 °C~ 12 minutes

 

Curing Time

Before overcoating Sikafloor®-328 allow:

Substrate temperature

Minimum

Maximum

+10 °C

24 hours

72 hours

+20 °C

18 hours

48 hours

+30 °C

16 hours

36 hours

Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
If maximum waiting time is exceeded, the surface of Sikafloor®-328 has to be grinded to achieve mechanical bonding between the layers of Sikafloor® system.

Applied Product Ready for Use

Temperature

Foot traffic

Full cure

+10 °C

~ 24 hours

~ 72 hours

+20 °C

~ 18 hours

~ 60 hours

+30 °C

~ 16 hours

~ 48 hours
Consumption

Consumption

~ 1.5 kg/m2/mm
Application steps

MIXING

Prior to mixing, stir part A mechanically. When all of part B has been added to part A, mix continuously for 2 minutes until a uniform mix has been achieved. To ensure thorough mixing pour materials into another container and mix again to achieve a consistent mix. Over mixing must be avoided to minimise air entrainment.

Mixing Tools

Sikafloor®-328 must be thoroughly mixed using a low speed electric stirrer (300 - 400 rpm) or other suitable equipment.

APPLICATION

Prior to application, confirm substrate moisture content, relative humidity and dew point.
Sikafloor®-328 is poured and spread evenly by means of a serrated trowel or pin rake. When used in a self-smoothing system, roll in two directions with a spike roller to ensure even thickness and to remove entrapped air.

CLEANING OF TOOLS

Clean all tools and application equipment with Thinner C immediately after use. Hardened and/or cured material can only be removed mechanically.

 

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