SikaBiresin® G519

Epoxy casting resin with good workability and high compressive strength

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SikaBiresin® G519 is a 2-component epoxy casting resin with very good mechanical properties for mold manufacturing.
The Product is applicable with high admixture of filler, e.g. with aluminum grit up to 100 : 100 parts per weight on component A.  

  • Very good mechanical properties
  • Long pot life
  • High temperature resistance
  • High compressive strength
  • Casting thickness up to 40 mm unfilled
 

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Overview

PRODUCT BENEFITS

  • Very good mechanical properties
  • Long pot life
  • High temperature resistance
  • High compressive strength
  • Casting thickness up to 40 mm unfilled
 

Areas of Application

SikaBiresin® G519 is designed for manufacturing of molds and stamping tools for metal sheet forming. 
The Product is also well suited for manufacturing of foundry and copy patterns and core boxes.
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® G519 (A)

Box with tins

6 x 1.5 kg

Pail15 kg

SikaBiresin® G519 (B)

Box with bottles

6 x 0.15 kg

Canister1.5 kg
 

Product Details

Properties

SikaBiresin® G519 (A)

SikaBiresin® G519 (B)

Chemical base
Epoxy resin, filled Amine, unfilled

Color

 

mixed

Black

Amber

Black

Mixing ratio

by weight

100 : 10

Density

 

cured

2.7 kg/l

0.98 kg/l

2.25 kg/l

Viscosity (CQP029-4)

 

mixed

75 000 mPa·s

2500 mPa·s

24 500 mPa·s

Pot life (CQP021-4)

850 g at 23 °C

80 minutes

Demolding time

24 hours

Curing time

at 23 °C

4 days

Maximum casting thickness

40 mm

Shore D hardness (CQP023-1 / ISO 868)

90 A

Flexural strength (CQP027-2 / ISO 178)

80 MPa A

Flexural modulus (CQP027-2 / ISO 178)

6000 MPa A

Tensile strength (CQP036-2 / ISO 527)

40 MPa A

Impact resistance (CQP038-2 / ISO 179)

9 kJ/m2 A

Compressive strength (CQP028-5 / ISO 604)

110 MPa A

Linear shrinkage (CQP014-5)

500 x 40 x 25 mm

1.7 mm/m A

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

74 °C A

Coefficient of thermal expansion (CQP053-1 / ISO 11359)

50 x 10-6 1/K A

Shelf life

18 months

24 months

CQP = Corporate Quality Procedure

A) curing condition: 50 °C for 16 hours

Application

Surface preparation

The material, processing and mold or mastermodel temperature shall be between 18 °C and 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 properly sealed prior applying the release agent.
Wax-based release agents are recommended. 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.
Further post curing of the demolded part can improve the final mechanical properties.
Depending on the geometry and weight of the part, it is recommended to use a conformer while post curing.

STORAGE CONDITIONS

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