SikaBiresin® F27 F55

Unfilled fastcast resin for rotomolding production

No image available

SikaBiresin® F27 F55 is an unfilled fast curing 2-component polyurethane system suitable for rotomolding production of hollow molds.  

  • High quality of surface detail reproduction
  • Low shrinkage and good dimensional
    stability
  • Short pot life and demolding time
  • Can be easily machined
  • Very fine structure
 
Show all documents
Find this product in your country
Go

Overview

PRODUCT BENEFITS

  • High quality of surface detail reproduction

  • Low shrinkage and good dimensional
    stability

  • Short pot life and demolding time

  • Can be easily machined

  • Very fine structure

 

Areas of Application

SikaBiresin® F27 F55 is designed for casting of master and core models, negatives and moldings of small up to medium dimensions. The Product is suitable for applications across thin layers. SikaBiresin® F27 F55 is well suited for casting of art and crafts articles. Due to the low viscosity it can reproduce very fine surface details. Due to its short pot life and demolding time, the Product can be used for rotomolding production of hollow molds. This product is suitable for experienced professional users only.  

Packaging

  

SikaBiresin® F27 (A)

Canister

5 kg

20 kg

Drum200 kg

SikaBiresin® F55 (B)

Canister

5 kg

20 kg

 

Product Details

Properties

Component A

SikaBiresin® F27

Component B

SikaBiresin® F55

Chemical base

Polyol, unfilled

MDI-based isocyanate, unfilled

Color

 

mixed

Beige

Colorless

White

Density

 

cured

1.02 kg/l

1.22 kg/l

1.1 kg/l

Mixing ratio

by weight

100 : 80

Viscosity (CQP029-4)

 

mixed

70 mPa·s

250 mPa·s

140 mPa·s

Pot life (CQP021-4)

200 g at 23 °C

1 minute 30 seconds

Demolding time

15 minutes

Curing time

at 23 °C

3 days

Shore D hardness (CQP023-1 / ISO 868)

75 A

Tensile strength (CQP036-2 / ISO 527)

40 MPa A

Elongation at break (CQP036-2 / ISO 527)

7 % A

Flexural strength (CQP027-2 / ISO 178)

60 MPa A

Flexural modulus (CQP027-2 / ISO 178)

1500 MPa A

Impact resistance (CQP038-2 / ISO 179)

50 kJ/m2 A

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

75 °C A

Shelf life

12 months

CQP = Corporate Quality Procedure

A) curing condition: after demolding 7 days at 23 °C

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

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.

STORAGE CONDITIONS

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

Documents