Product Data Sheet Show all documents

Sikafloor®-20 ZA

High strength, chemical and thermal shock resistant polyurethene hybrid trowel grade flooring screed with high slip resistance

Sikafloor®-20 ZA is a multi-component, water based colored polyurethane hybrid flooring screed. It has flat, high abrasion, chemical, impact and high slip-resistant finish.

  • Good resistance to specific chemicals
  • High mechanical resistance
  • Non-tainting
  • Odourless
  • Thermal expansion properties similar to concrete
  • Tolerant to substrates with high moisture content
Product Data Sheet Show all documents

Usage

The Product is used as a wearing layer and levelling screed flooring system. Please note:
  • The Product may only be used by experienced professionals.

Advantages

  • Good resistance to specific chemicals
  • High mechanical resistance
  • Non-tainting
  • Odourless
  • Thermal expansion properties similar to concrete
  • Tolerant to substrates with high moisture content

Packaging

Container Part A

3 kg

Container Part B

3 kg

Part C

26.5 kg bag

Packaging combined

32.5 kg ready to mix units

Colour

Part A

Coloured liquid

Part B

Brown liquid

Part C

Natural grey powder

Cured appearance

Matt finish

Cured colour

Telegrey 1&2, Beige, Golden Yellow, Dusty Grey, Traffic Red, Oxide Red, Light Grey, Dark Grey, Sky Blue, Leaf Green

Product Details

Product Information

Chemical Base

Water-based polyurethane cement hybrid

Shelf Life

Part A

12 months from date of production

Part B

12 months from date of production

Part C

9 months from date of production

Density

Mixed Product

~2.08 kg/l at +20 °C

(EN ISO 2811-1)
Technical Information

Shore D Hardness

Cured 7 days at +23 °C

85

(ASTM D2240)

Compressive Strength

Cured 28 days at +23 °C

50 N/mm²

(EN 13892-2)

Tensile Strength

Cured 28 days at +23 °C

10 N/mm²

(EN 13892-2)

Reaction to Fire

Class Bfl-s1

(EN 13501-1)

Application

Application Information

Mixing Ratio

Part A : Part B : Part C

3.0 : 3.0 : 26.5

Layer Thickness

Wear coat

6-9 mm

Levelling screed

12-30 mm (where defined aggregates are added)

Product Temperature

Sikafloor®-20 ZA

Minimum

+10 °C

Maximum

+35 °C

Ambient Air Temperature

Minimum

+10 °C

Maximum

+35 °C

Relative Air Humidity

Maximum

80 %

Dew Point

Beware of condensation. The substrate and uncured applied product must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the surface of the applied product. Low temperatures and high humidity conditions increase the probability of blooming.

Substrate Temperature

Minimum

+10 °C

Maximum

+35 °C

Substrate Moisture Content

The Product can be installed on substrates with a higher moisture content. No ponding water may be present on the surface. Check for rising moisture. The substrate must be visibly dry and must have a minimum pull-off strength of 1.5 N/mm².

Pot Life

+10 °C

~40 minutes

+20 °C

~25 minutes

+30 °C

~18 minutes

+35 °C

~15 minutes

 

Waiting Time / Overcoating

Before overcoating the Product allow:

Substrate temperature

Minimum

Maximum

+10 °C

24 hours

72 hours

+20 °C

24 hours

48 hours

+30 °C

12 hours

24 hours

+35 °C

12 hours

24 hours

Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.

Note: If a primer other than a scratch coat of Sikafloor PurCem is applied, refer to the relevant PDS of the chosen product for curing times. Ensure that the primer or scratch coat is fully cured before the application of subsequent Sikafloor-20 ZA layers.
Consumption

Consumption

~2.1 kg/m² per mm thickness
Application steps

EQUIPMENT

MIXING EQUIPMENT

  • Electric single paddle mixer (300 to 400 rpm)

  • Electric double paddle mixer (>700 W, 300 to 400 rpm)

  • Forced action / rotating pan / double paddle or trough type mixer (300–400 rpm )

APPLICATION EQUIPMENT

  • Flat, round edge steel trowel

  • Short pile roller

MIXING

3 PART MIXING PROCEDURE

  1. Mix Part A (resin) for ~30 seconds.
  2. Add Part D (colour pack) to Part A.
  3. Mix Part A + B continuously for 30 seconds until a uniformly coloured mix is achieved.
  4. Pour the mixed resin Parts into the pan mixer.
  5. Start the pan mixer and gradually add Part C (aggregate) to the mixed resin Parts over a period of 15 seconds.
  6. After combining all parts, mix for an additional 2 minutes, until a uniform mix is achieved. Note: At ambient temperatures less than +15 °C mix between 30 seconds and 1 minute longer.
  7. During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing.

APPLICATION

IMPORTANT

Protecting the material after application

After application, protect the System from damp, condensation and direct water contact for at least 24 hours.

IMPORTANT

Protect from overhead leaks and condensation

Protect the Product during application from pipe condensation or any overhead leaks.

IMPORTANT

Ventilation in confined spaces

Always ensure good ventilation when applying the Product in a confined space.

IMPORTANT

Application on polymer modified cement mortars

Do not apply the product on polymer modified cement mortars if the mortar expands when sealed with an impervious resin.

IMPORTANT

Waiting time for foodstuff

Allow a minimum of 48 hours after application before placing foodstuff in the same area.

RESIN SCREED

  1. Pour the mixed Product "wet on wet" onto the still tacky primer. Note: The consumption is specified in Application Information.
  2. Spread and compact the Product with a trowel to the required thickness between screed rails / battens, if installed.
  3. Level the screed surface with a levelling beam spanning onto the screed rails / battens.
  4. Finish the surface to the required surface texture with trowels or walk-behind power floats.

CLEANING OF TOOLS

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

 

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