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Sika® Ucrete® MF 40 AS

(former Ucrete® MF 40 AS)

Antistatic, smooth heavy-duty polyurethane flooring screed

Sika® Ucrete® MF 40 AS is a heavy-duty resin floor which provides a smooth protective antistatic floor finish suitable for applications in predominantly dry ESD and ECF environments.

  • Resistant to bacterial or mould growth
  • Suitable for application on to 7-day-old concrete and 3-day-old polymer screed
  • Electrostatically conductive
  • Very good resistance to specific chemicals
  • Very good mechanical resistance
  • Impermeable to liquids
  • Non-tainting after curing
  • Odourless
  • Thermal expansion properties similar to concrete
  • Tolerant to substrates with high moisture content
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Usage

Sika® Ucrete® MF 40 AS is used in the electronics industry to protect sensitive electronic devices and in explosion hazarded areas. Sika® Ucrete® MF 40 AS is used within dry process areas including the following application areas:
  • Food and beverage facilities
  • Pharmaceutical facilities
  • Chemical and processing facilities
  • Clean rooms
  • Electronic facilities and data centres
  • Defence estates
Please note:
  • The Product may only be used by experienced professionals.
 

Advantages

  • Resistant to bacterial or mould growth
  • Suitable for application on to 7-day-old concrete and 3-day-old polymer screed
  • Electrostatically conductive
  • Very good resistance to specific chemicals
  • Very good mechanical resistance
  • Impermeable to liquids
  • Non-tainting after curing
  • Odourless
  • Thermal expansion properties similar to concrete
  • Tolerant to substrates with high moisture content

Packaging

Refer to the current price list for available packaging variations

Colour

Cured colour

Red, Orange, Yellow, Grey, Green, Green/Brown, Blue.

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

  • Food and Beverage Facilities Suitability, Sika® Ucrete®, HACCP, Test Report No. I-PE-769-SA-2-RG-06b

  • Halal Certification Europe (HCE), Sika® Ucrete®, WHFC, Certificate No. 21453-2/1/1/Y1

  • Indoor Air Comfort Gold EN 16516, Sika® Ucrete®, eurofins, Certificate No. IACG-321-01-01-2023
Product Information

Composition

Water-based polyurethane cement hybrid

Shelf life

Always refer to the best-before date of the individual packaging.

Storage conditions

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 the packaging.

Density

~1.97 kg/l (mixed)

(EN ISO 2811-1)

 
System information

System structure

glo-en-02-Ucrete-3

Layer

Product

1.

Option 1: Primer slurry

Sika® Ucrete® PFS

Option 2: Scratch coatSika® Ucrete® MF

2.

Earthing connection

Copper tape

3.

Wearing layer

Sika® Ucrete® MF 40 AS
Technical Information

Compressive strength

Cured 28 days at +23 °C

48–53 N/mm²

Modulus of elasticity in compression

3250–4000 MPa

(BS 6319-6)

Flexural-strength

Cured 28 days at +23 °C

18–21 N/mm²

Tensile strength

Cured for 28 days at +20 °C

7–9 MPa

Tensile adhesion strength

> 2.0 N/mm² (concrete failure)

(EN 1542)

Coefficient of thermal expansion

3.6 × 10-5 °C-1

(ASTM C531)

Reaction to fire

Class Bfl-s1

(EN 13501-1)

Chemical resistance

Laboratory-defined resistance to many individual chemicals. Before proceeding, contact Sika Technical Service for specific information.

Skid / slip resistance

PTV, slider 96

30–35 wet conditions

Class

R 10

Note: Optimum slip resistance can only be maintained with regular cleaning.

Electrostatic behaviour

Resistance to ground

RG< 1 × 106 Ω

Resistance to ground

RG < 109 Ω

Body voltage generation

< 100 V

System Resistance (Person/Footwear/Floor)

< 35 MΩ

Note: Measurement results can be affected by ESD clothing, ambient conditions, measurement equipment, cleanliness of the floor and the test personnel.

Service temperature

Min. -15 °C / Max. +70 °C

Application

Application Information

Layer thickness

~4–6 mm

Material temperature

Min. +18 °C / Max. +25 °C

Ambient air temperature

Min. +18 °C / Max. +35 °C

Substrate temperature

Min. +18 °C / Max. +30 °C

Curing time

Substrate temperature

Return to traffic

+18 °C

< 24 hours

+15 °C

4 hours (with Sika® Ucrete® Accelerator)

Note: Times are approximate and will be affected by changing ambient and substrate conditions.

 
Consumption

Consumption

Layer

Product

Consumption

Option 1: Primer slurry

Sika® Ucrete® PFS

1.6–2.5 kg/m2

Option 2: Scratch coatSika® Ucrete® MF2–3 kg/m2

Earthing connection

Copper tape

Maximum distance 10 m between strips

Wearing layer

Sika® Ucrete® MF 40 AS

8–10 kg/m2 for 4 mm

12–14 kg/m2 for 6 mm
Application steps

SUBSTRATE PREPARATION

IMPORTANT

Reduced service life due to incorrect treatment of cracks

The incorrect assessment and treatment of cracks may lead to a reduced service life and reflective cracking.

  1. For static cracks, ensure the width is suitable for overcoating with Sika® Ucrete® MF 40 AS.
  2. For dynamic cracks, ensure the movement is within the movement capacity of Sika® Ucrete® MF 40 AS.
 

TREATMENT OF JOINTS AND CRACKS

Construction joints and existing static surface cracks in substrate require pre-treating before full layer application. Use Sikadur® or Sikafloor® resins.

The System can be applied on green or damp concrete with no standing water. Allow for at least 3 days for early concrete shrinkage to occur to prevent shrinkage cracks from appearing on the wearing surface.

Cementitious substrates must be structurally sound and of sufficient compressive strength (minimum 30 N/mm2) with a minimum tensile strength of 1.5 N/mm2.

Substrates must be clean, dry and free of contaminants such as dirt, oil, grease, coatings, laitance, surface treatments and loose friable material.

APPLICATION

Application must be undertaken by a fully trained and licensed Sika® Ucrete® applicator.

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