Product Data Sheet Show all documents
Sikafloor®-420

Sikafloor®-420

1-part PUR highly elastic coating

Sikafloor®-420 is a one part, elastic, low solvent containing, low odour, UV resistant, coloured, moisture-triggered polyurethane resin coating.

  • Low odour formulation
  • High solids
  • Moisture-triggered
  • Good UV and yellowing resistance
  • Weather resistant
  • Abrasion resistant with normal use
  • Slip resistant surfaces are possible
  • A range of finishes are available
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Product Data Sheet Show all documents

Usage

  • Smooth or slip resistant, UV resistant, waterproof, abrasion resistant coating for concrete and cementitious screed substrates.
  • For light to medium mechanical exposure.
  • For balconies, terraces, footbridges, stairways, etc.
 

Advantages

  • Low odour formulation
  • High solids
  • Moisture-triggered
  • Good UV and yellowing resistance
  • Weather resistant
  • Abrasion resistant with normal use
  • Slip resistant surfaces are possible
  • A range of finishes are available

Packaging

5 litre (6.45 kilos), 15 litre (19.35 kilos) units

Colour

Masterbatch: Coloured liquid. White.
Tinted product: Coloured liquid. Broad colour range available.

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Classification of reaction to fire performance in accordance with EN 13501-1:2007+A1:2009. Reaction to fire classification: Dfl-s1.
  • Synthetic resin screed material according to EN 13813:2002, Declaration of Performance 98311139, and provided with the CE-marking.
  • Ignitability of building products subjected to direct impingement of flame. Part 2: Single flame source test. Passed.
  • Odour concentration (EN 13725:2003), tested at Odournet GmbH in Germany.
Product Information

Chemical Base

Elastomeric Aliphatic Polyurethane

Shelf Life

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

Storage Conditions

12 months from date of production

Density

~1.29kg/litre

(DIN EN ISO 2811-11)

Solid content by mass

~89.3%

Solid content by volume

~85.9%
Technical Information

Abrasion Resistance

~23mg (CS 10/1000 revolutions)

(BS EN ISO 7784-2:2006)

Tensile Strength

~5.0MPa

(EN ISO 527-3)

Chemical Resistance

Resistant to many chemicals.  Please ask for a detailed chemical resistance chart.
Please Note:   Wine, coffee, some leaves and flower petals etc. may cause surface discolouration.  This will have no effect on the product performance and durability.

Application

Application Information

Ambient Air Temperature

+5°C min. / +30°C max.

Lower temperature and humidity will prolong curing times.  Ensure the floor is protected from foot traffic until adequately cured.

Relative Air Humidity

80% r.h. max.
35% min. (below +20°C: 45% min.)

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

*+5°C min. / +30°C max.

* Lower temperature and humidity will prolong curing times.  Ensure the floor is protected from foot traffic until adequately cured.

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

The material in opened containers should be applied immediately.  With open containers surface film formation will occur within 1–2 hours.
High temperatures and high air humidity will accelerate curing significantly.

Curing Time

Before overcoating Sikafloor®-420 allow:

Substrate temperature

Minimum

Maximum

+10°C

24 hours

14 days

+20°C

16 hours

14 days

+30°C

12 hours

7 days

Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.  After thorough cleaning, Sikafloor®-420 can be overworked with itself at any time, assuming that all dirt has been removed and contamination is avoided.

Applied Product Ready for Use

Temperature (r.h. 50%)

Rain resistant

Foot traffic

Full Cure

+10°C

~ 15 hours

~ 1–2 days*

~ 7 -14 days*

+20°C

~ 5 hours

~ 24 hours*

~ 5–9 days*

+30°C

~ 3 hours

~ 18 hours*

~ 3–5 days*

When using Sika®-PU Accelerator:

Temperature (r.h. 75%)

Rain Resistant

Foot Traffic

Full Cure

+20°C

~ 1 hour

~ 3 hours*

~ 3-5 days*

*Strongly influenced by layer thickness

Note:  Times are approximate and will be affected by changing ambient conditions
Application steps

MIXING

Prior to use stir Sikafloor®-420 mechanically for 3 minutes.  If required the Extender T should be added into the Sikafloor®-420 until a uniform mix has been achieved.  Over mixing must be avoided to minimise air entrapment.

        
Mixing Tools:
Sikafloor®-420 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®-420 can be applied by brush, roller or squeegee. At higher coverage rates Sikafloor®-420 may be poured and spread evenly with a trowel.

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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