SikaBiresin® UR572 L20

Elastomeric casting resin for production of parts and molds

Image not available

SikaBiresin® UR572 L20 is a 2-component polyurethane elastomeric casting resin for production of parts and molds.  

  • Easy processing
  • Very good tear strength
  • Good chemical resistance to dedicated release agents for cement concrete
  • Solvent and mercury free
  • Casting thickness up to 100 mm
 

Overview

PRODUCT BENEFITS

  • Easy processing
  • Very good tear strength
  • Good chemical resistance to dedicated release agents for cement concrete
  • Solvent and mercury free
  • Casting thickness up to 100 mm
 

Areas of Application

SikaBiresin® UR572 L20 is designed for production of flexible parts and molds by hand casting or with help of a 2-component low pressure equipment. 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® UR505 (A)

Canister

11 kg

Drum225 kg
IBC1125 kg

SikaBiresin® UR572 L20 (B)

Pail

18.3 kg

 

Product Details

Properties

Component A

SikaBiresin® UR505

Component B

SikaBiresin® UR572 L20

Chemical base

Isocyanate

Polyol

Color

 

mixed

Straw yellow

Beige

Beige

Density

 

cured

1.21 kg/l

1.22 kg/l

1.25 kg/l

Mixing ratio

by weight

by volume

30 : 100

30 : 100

Viscosity (CQP029-4)

 

mixed

450 mPa·s

1500 mPa·s

1000 mPa·s

Pot life (CQP021-4)

130 g at 23 °C

20 minutes

Casting thickness

up to 100 mm

Shore A hardness (CQP023-1 / ISO 868)

A1

A15

75 A

71 A

Tensile strength (CQP036-6 / ISO 37)

9 MPa A

Tear strength (CQP045-1 / ISO 34)

31 kN/m A

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

700 % A

BASHORE resilience (ASTM 2632)

30 % A

Linear shrinkage (CQP014-5)

1020 x 140 x 100 mm

5.9 mm/m A

Abrasion resistance (Taber) (ISO 5470)

40 mm3/100U A

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

0 °C A

Shelf life

9 months

CQP = Corporate Quality Procedure

A) curing condition: 80 °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.