Product Data Sheet Safety Data Sheet Show all documents

SikaForce®-7800 BLUE

Fast curing profile and surface filler for blade repair applications

SikaForce®-7800 BLUE is a two component polyurethane based profile and surface filler that works best at temperature below 15 °C (59 °F). If ambient temperatures are higher than 15 °C (59 °F) it is advisable to use SikaForce®-7800 RED.  

  • Superior mixing, application and tooling properties
  • Very good adhesion to GFRP
  • Non-sag up to layer thicknesses of approx. 20 mm (0.75 in)
  • Fast sanding time
  • Easy to sand, does not clog the sandpaper
 
Product Data Sheet Safety Data Sheet Show all documents

PRODUCT BENEFITS

  • Superior mixing, application and tooling properties
  • Very good adhesion to GFRP
  • Non-sag up to layer thicknesses of approx. 20 mm (0.75 in)
  • Fast sanding time
  • Easy to sand, does not clog the sandpaper
 

Usage

SikaForce®-7800 BLUE is used for profile shaping and surface filling of damaged rotor blades 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.  

Packaging

  

SikaForce®-7800 BLUE

Coaxial cartridge

195 ml

Product Details

Typical Product Data
Properties

SikaForce®-7800 BLUE (A)

SikaForce®-7800 (B)

Chemical base

Polyols

Isocyanate derivatives

Color (CQP001-1)

 

mixed

Light blue

Brown

Light blue

Cure mechanism

Polyaddition

Density (uncured)

mixed (calculated)

1.30 kg/l (10.8 lb/gal) A

Solid content

100 %

Mixing ratio

by volume

100 : 50

Viscosity (CQP029-4)

25 mm PP, d = 1 mm, 10 s-1

35 Pa·s A

15 Pa·s A

Consistency

Thixotropic paste

Application temperature

5 ─ 30 °C (41 ─ 86 °F)

Working time

2 minutes A

Sanding time

at 5 °C (41 °F)

at 10 °C (50 °F)

at 15 °C (59 °F)

40 minutes

30 minutes

15 minutes

Elongation at break (CQP543-1 / ISO 527)

2.5 % A, B

Glass transition temperature (ISO 11357-2)

55 °C (131 °F)

Shelf life

15 months C

CQP = Corporate Quality Procedure

A) 23 °C (73 °F) / 50 % r.h.

B) tested at 2 mm/min

C) storage between 10 and 30 °C (50 and 86 °F)
Technical Information

CURE MECHANISM

The curing of SikaForce®-7800 BLUE takes place by a chemical reaction of the two components. Higher temperatures speed up the curing process and lower slow it down.

CHEMICAL RESISTANCE

In case of chemical or thermal exposure, conduct project related testing.

Application

Application Information

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

For the cartridge application use a suitable manual or a compressed air piston-type cartridge gun. To ensure good mixing quality a static mixer of type Sulzer MixPac® Quadro MGQ 08-20T is to be used.

Extrude adhesive without mixer to equalize the filling levels. Attach the mixer and dispose the first few cm of the bead before the application.

Removal

Uncured SikaForce®-7800 BLUE 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 a suitable industrial hand cleaner and water.

Do not use solvents on skin.

 

STORAGE CONDITIONS

SikaForce®-7800 BLUE has to be kept between 10 °C and 30 °C (50 °F and 86 °F) in a dry place. Do not expose it to direct sunlight or frost.

Minimum temperature during transporation is

-20 °C (-4 °F) for maximum 7 days.

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