SikaBiresin® GC108 GC155

Epoxy gelcoat with very high temperature resistance

No image available

SikaBiresin® GC108 GC155 is a 2-component epoxy gelcoat with very high heat resistance.  

  • Good mechanical properties
  • Very high temperature resistance up to 160 °C
  • Easy to apply
 
Show all documents
Find this product in your country

Overview

PRODUCT BENEFITS

  • Good mechanical properties

  • Very high temperature resistance up to 160 °C

  • Easy to apply

 

Areas of Application

SikaBiresin® GC108 GC155 is designed for production of hand laminates with very high heat resistance. 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® GC108 (A)

Pail

8 kg

SikaBiresin® GC155 (B)

Canister

1.4 kg

 

Product Details

Properties

Component A

SikaBiresin® GC108

Component B

SikaBiresin® GC155

Chemical base

Epoxy resin, filled

Amine, unfilled

Color

 

mixed

Black

Amber

Black

Density

 

cured

1.21 kg/l

0.98 kg/l

1.19 kg/l

Mixing ratio

by weight

100 : 28

Viscosity (CQP029-4 / ISO 3219)

 

mixed

Pasty

120 mPa·s

21 000 mPa·s

Pot life (CQP021-4)

200 g at 23 °C

100 minutes

Tack free time (CQP019-3)

at 23 °C

230 minutes

Demolding time

earliest after

24 hours

Shore D hardness (CQP023-1 / ISO 868)

86 A

Flexural modulus (CQP027-2 / ISO 178)

3100 MPa A

Flexural strength (CQP027-2 / ISO 178)

101 MPa A

Impact resistance (CQP038-2 / ISO 179)

17 kJ/m2 A

Compressive strength (CQP028-5 / ISO 604)

130 MPa A

Heat deflection temperature (CQP030-1 / ISO 75B)

160 °C A

Glass transition temperature (CQP053-1 / ISO 11359)

164 °C A

Shelf life

24 months

CQP = Corporate Quality Procedure

A) curing condition: 160 °C for 8 hours

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 at 160 °C for 8 hours improves the resistance of the gelcoat in respect of temperature, solvents and water.
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.

Documents