SikaBiresin® GC050

Epoxy gelcoat with good spreading properties for tooling applications

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SikaBiresin® GC050 is a 2-component epoxy gelcoat with good spreading properties for tooling applications.
SikaBiresin® GC050 is also available with hardener SikaBiresin® GC14 for longer pot life.  

  • Good spreading and covering properties
  • Good workability
 
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Overview

PRODUCT BENEFITS

  • Good spreading and covering properties

  • Good workability

 

Areas of Application

SikaBiresin® GC050 is designed for manufacturing of gauges, negatives and foundry patterns. 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® GC050 (A)

Box with bottles

12 x 0.5 kg

Pail

5 kg

10 kg

SikaBiresin® GC11 (B)

Box with bottles12 x 0.05 kg

Bottle

0.5 kg

Canister9 kg
 

Product Details

Properties

Component A

SikaBiresin® GC050

Component B

SikaBiresin® GC11

Chemical base

Epoxy resin, filled

Amine, unfilled

Color

 

mixed

White

Amber

White

Density

 

cured

1.59 kg/l

1.08 kg/l

1.57 kg/l

Mixing ratio

by weight

100 : 10

Viscosity (CQP029-4 / ISO 3219)

 

mixed

13 000 mPa·s

1400 mPa·s

13 000 mPa·s

Pot life (CQP021-4)

165 g at 23 °C

19 minutes

Tack free time (CQP019-3)

at 23 °C

60 minutes

Shore D hardness (CQP023-1 / ISO 868)

88 A

Flexural modulus (CQP027-2 / ISO 178)

4450 MPa A

Flexural strength (CQP027-2 / ISO 178)

72 MPa A

Glass transition temperature (CQP053-1 / ISO 11359)

23 °C for 48 h

50 °C for 16 h

80 °C for 16 h

50 °C

75 °C

85 °C

Shelf life

24 months

CQP = Corporate Quality Procedure

A) curing condition: 23 °C for 24 h + 50 °C for 16 h

Application

Surface preparation

The material, processing and mold or master-model 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 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

Apply the gelcoat to the mold in a uniform thickness using a flat, short-haired brush. The material must be applied in a uniform direction to produce a homogeneous, gap-free surface layer.
A coupling layer or other backfill layer shall be applied as close as possible to the tacky phase to ensure proper adhesion and prevent bonding issues. Tack-free time depends on application thickness, room and mold temperature.

 

Post-curing of the finished part improves the resistance of the gelcoat in respect of temperature, solvents and water.
The duration of the post-curing process depends on the mass and thickness of the finished part.
Note: The post-curing requires a slow temperature increase and decrease process.
Depending on the geometry and weight of the part, it is recommended to use a counterpart (conformer) during post-curing.

STORAGE CONDITIONS

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

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