SikaForce®-812 L07 MR

Fast curing, moisture resistant adhesive and surface filler for blade repair applications

Image not available

SikaForce®-812 L07 MR is a 2-component polyurethane based adhesive and surface filler that works best at temperature above 10 °C. The product is characterised by fast curing and optimised moisture resistance.  

  • Good mixing, application and tooling properties
  • Optimised moisture resistance 
  • Very good adhesion to GFRP
  • High strength and stiffness
 

Find this product in your country

Go

Overview

PRODUCT BENEFITS

  • Good mixing, application and tooling properties
  • Optimised moisture resistance 
  • Very good adhesion to GFRP
  • High strength and stiffness
 

Areas of Application

SikaForce®-812 L07 MR is used for profile shaping and surface filling of damaged rotor blades as well as fast bonding applications in the wind turbine industry. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.  

Product Details

Properties

Component A

SikaForce®-812 L07 MR

Component B

SikaForce®-010 

Chemical base

Polyols

Isocyanate derivatives

Color (CQP001-1)

  

mixed

White

Brown

Beige

Cure mechanism

Polyaddition

Density (uncured)

  

mixed (calculated)

1.30 g/cm3

1.24 g/cm3

1.27 g/cm3

Mixing ratio

by volume

by weight

100 : 42

100 : 40

Viscosity (CQP029-4)

25 °C, 40 mm PP, d = 0.8 mm, 500 s-1
25 °C, 40 mm PP, d = 0.5 mm, 50 s-1

5.0 Pa·s 
 


0.2 Pa·s

Application temperature

10 ─ 35 °C

Shore D hardness (CQP023-1 / ISO 48-4)

80 A, B

Tensile strength (CQP036-2 / ISO 527)

40 MPa A, B, C

Elongation at break (CQP036-2 / ISO 527)

2 % A, B, C

E-Modulus (CQP036-2 / ISO 527)

3 200 MPa A, B, C

Tensile lap-shear strength (CQP046-9 / ISO 4587)

12 MPa A, B, D

Glass transition temperature (CQP509-1 / ISO 6721)

60 °C B

Shelf life

12 months

9 months

CQP = Corporate Quality Procedure

A) 23 °C / 50 % r.h.

B) cured for 28 days at 23 °C

C) tested at 2 mm/minD) adhesive layer: 25 x 12.5 x 3 mm / on GFRP

CURE MECHANISM

The curing of SikaForce®-812 L07 MR takes place by a chemical reaction of the two components. Higher temperatures speed up and lower temperatures slow down the curing process. The final glass transition temperature, as well as the tensile and shear strengths, may be increased with higher curing temperature.

CHEMICAL RESISTANCE

In case of chemical or thermal exposure, it is required to conduct project related testing.

Application

Surface preparation

Surfaces must be clean, dry and free from grease, oil, dust and contaminants. After the cleaning process, a physical or chemical pre-treatment might be required, depending on surface and type of material. The type of pre-treatment must be determined by tests.

Application

Apply with a trowel within working time. If mixed in larger amounts, the exothermic reaction can reduce the pot-life and open time significantly. For support on selecting and setting up a suitable pump system, contact the System Engineering department of Sika Industry.

 

Removal

Uncured SikaForce®-812 L07 MR may be removed from tools and equipment with Sika® Remover-208. Once cured, the material can only be removed mechanically.

Hands and exposed skin have to be washed immediately using hand wipes such as Sika® Cleaner-350H or a suitable industrial hand cleaner and water.

Do not use solvents on skin.

STORAGE CONDITIONS

SikaForce®-812 L07 MR has to be kept between 10 °C and 30 °C in a dry place. Do not expose it to direct sunlight or frost.

After opening of the packaging, the content has to be protected against humidity.