SikaBiresin® UR563 L20

Elastomeric casting resin for mold making

No image available

SikaBiresin® UR563 L20 is a 2-component polyurethane elastomeric casting resin for mold making.  

  • High chemical resistance
  • Casting thickness up to 100 mm
  • Good flow behavior
  • Solvent and mercury free
  • Good mechanical properties
 
Show all documents
Find this product in your country

Overview

PRODUCT BENEFITS

  • High chemical resistance

  • Casting thickness up to 100 mm

  • Good flow behavior

  • Solvent and mercury free

  • Good mechanical properties

 

Areas of Application

SikaBiresin® UR563 L20 is designed for production of flexible molds and tools for concrete industry. The Product is especially well suited for large serie production. This product is suitable for experienced professional users only. Tests under actual processing conditions and with additional materials such as coatings and release agents must be performed to proof material compatibility.  

Packaging

  

SikaBiresin® UR503 (A)

Canister

2.5 kg

5 kg

Drum227.5 kg

SikaBiresin® UR563 L20 (B)

Pail

14.3 kg

Drum200 kg
 

Product Details

Properties

Component A

SikaBiresin® UR503

Component B

SikaBiresin® UR563 L20

Chemical base

Isocyanate

Polyol

Color

 

mixed

Amber

Grey

Grey

Density

 

cured

1.16 kg/l

1.33 kg/l

1.31 kg/l

Mixing ratio

by weight

35 : 100

Viscosity (CQP029-4)

 

mixed

2000 mPa·s

4700 mPa·s

2500 mPa·s

Pot life (CQP021-3 / Gel Timer TECAM)

135 g at 23 °C

20 minutes

Demolding time

24 hours

Curing time

at 23 °C

5 days

Casting thickness

up to 100 mm

Shore A hardness (CQP023-1 / ISO 868)

A1

A15

65 A

63 A

Tensile strength (CQP036-6 / ISO 37)

4.8 MPa A

Tear strength (CQP045-1 / ISO 34)

16.5 kN/m A

Elongation at break (CQP 036-6 / ISO 37)

670 % A

Linear shrinkage (CQP014-5)

1020 x 140 x 100 mm

3.8 mm/m

Glass transition temperature TMA (CQP053-1 / ISO 11359)

0 °C A

Service temperature

-40 – 70 °C

Shelf life

6 months

12 months

CQP = Corporate Quality Procedure

A) curing condition: 2 hours in a mold at 40 °C + 70 °C for 12 hours

Application

Surface preparation

The material, processing and mold or master-model temperature shall be between 18 °C – 25 °C.
Make sure the mold or master model is clean, dry, dust and grease free.
If mold or master-model surface is porous, it must be sealed prior applying the release agent.
It is recommended to use wax-based release agents. For further information regarding Sika release agent consult the corresponding Product Data Sheet.

Application

Immediately after mixing pour the Product into the mold starting at the deepest point.
Demolding time may vary depending on casted thickness and room temperature.
To achieve the highest performance, leave the elastomeric mold at a temperature ≥ 23 °C for 5 days before using it.

STORAGE CONDITIONS

Both components must be stored at temperature between 15 °C and 25 °C in original unopened containers.

Documents