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Sikafloor-425, Elastic Smooth Pu Floor Coating, 1-Component, Interior

Sikafloor-425, Elastic Smooth Pu Floor Coating, 1-Component, Interior

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SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Ambalaj 6.5 kg (5 L)
Baza chimică Elastomeric aliphatic polyurethane
Utilizare Waterproof coating for concrete and under tiles
Metoda de aplicare Roller or trowel
Zona de utilizare Interior
Culoare Slate Grey
Temperatura aerului ambiant +2 °C min. / +30 °C max.
Condiții de depozitare The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.Refer to current Safety Data Sheet for information on safe handling and storage.
Timp de întărire As soon as the container is opened, surface film formation will happen within 1–2 hours. High temperatures and high air humidity will accelerate curing significantly.
Timp de lucru N/A
Densitate Mixed Product: 1.29 kg/L
Consum 0.9–1.4 kg/m²

1-part elastic smooth polyurethane floor coating

Sikafloor-425 is a 1-part coloured, UV resistant polyurethane resin floor coating. It provides a seamless, waterproof and slip resistant smooth matt finish. It is part of the Sikafloor Monoflex flooring range for decorative or engineered applications

  • iCure based technology
  • Moisture-activated curing
  • Good crack-bridging ability
  • Fast curing
  • Abrasion resistant
  • Good adhesion to substrate
  • Slip resistant
  • Waterproof
  • Water vapour permeable
  • Resistant to weathering
  • High yellowing resistance
Usage
The Product can be used as a:
  • Waterproof coating on concrete and underneath tiles
Please note:
  • The Product may only be used by experienced professionals.
 
Advantages
  • iCure based technology
  • Moisture-activated curing
  • Good crack-bridging ability
  • Fast curing
  • Abrasion resistant
  • Good adhesion to substrate
  • Slip resistant
  • Waterproof
  • Water vapour permeable
  • Resistant to weathering
  • High yellowing resistance
Packaging

6.5 kg (5 L) container

19.5 kg (15.1 L) container

Refer to current price list for packaging variations.
Colour

Final floor finish colour

RAL 7015 (slate grey), RAL 85 00 (light grey), RAL 9016 (traffic white)

Applied colours selected from colour charts will be approximate.

For colour matching: Apply colour sample and confirm selected colour under real lighting conditions.
Technical Information
Abrasion Resistance

AR0.5 (special) - Accelerated Resistance

(BS 8204-2)

Tensile Strength

Unreinforced

~7.5 MPa

Reinforced

~17 MPa

Chemical Resistance

Resistant to many chemicals. Contact Sika Technical Services for additional information.

Note: Wine, coffee, certain leaves, flower petals and similar organic materials may cause surface discolouration. This will have no effect on the product performance and durability. Use a suitable top coat, such as Sikafloor-418, for improved cleanability and resistance to contamination
Application Information
Layer Thickness

Refer to the relevant System Data Sheet
Product Temperature

Minimum

+2 °C

Maximum

+30 °C
Ambient Air Temperature

Minimum

+2 °C

Maximum

+30 °C
Relative Air Humidity

Maximum

80 %

Minimum

35 %
Dew Point

Beware of condensation. The substrate and uncured applied floor material 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

+2 °C

Maximum

+30 °C
Substrate Moisture Content

< 4 % parts by weight (Sika Tramex moisture meter)

No rising moisture (ASTM D4263, polyethylene sheet)

The substrate must be visibly dry with no standing water.
Pot Life

As soon as the container is opened, surface film formation will happen within 1–2 hours. High temperatures and high air humidity will accelerate curing significantly.
Waiting Time / Overcoating

Note: Times are given at 50 % r.h.. Times in brackets are with the use of Sika PU Accelerator.

Substrate temperature

Minimum

Maximum

+10 °C

~24 hours (6 hours)

~14 days (14 days)

+20 °C

~16 hours (4 hours)

~14 days (7 days)

+30 °C

~12 hours (2 hours)

~7 days (7 days)

Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.
Applied Product Ready for Use

Note: Times are given at 50 % r.h.. Times in brackets are with the use of Sika PU Accelerator.

Temperature

Rain resistant

Foot traffic

Full cure

+10 °C

~15 hours

(2 hours)

~24–48 hours

(4 hours)

~7–14 days

(36 hours)

+20 °C

~5 hours

(1 hour)

~24 hours

(3 hours)

~5–9 days

(24 hours)

+30 °C

~3 hours

(30 min)

~18 hours

(2 hours)

~3–5 days

(16 hours)

Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity. Times are also dependant on layer thickness.