SikaForce®-472 L9

Non sagging structural adhesive

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SikaForce®-472 L9 is a high viscous 2-component polyurethane adhesive for assembling sandwich panels and similar constructions of various materials.  

  • Room temperature curing
  • Highly impact resistant
  • High tensile strength
  • Solvent free
  • Good non-sag properties
 
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Overview

PRODUCT BENEFITS

  • Room temperature curing
  • Highly impact resistant
  • High tensile strength
  • Solvent free
  • Good non-sag properties
 

Areas of Application

SikaForce®-472 L9 is used primarily for industrial structural bonding of different materials like metals, ceramics, wood and wood derivatives. 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®-472 L9

Component B

SikaForce®-040

Chemical base

Polyols

Isocyanate derivatives

Color (CQP001-1)

 

mixed

Grey

Brown

Grey

Cure mechanism

Polyaddition

Density (uncured)

 

mixed (calculated)

1.50 g/cm3

1.23 g/cm3

1.44 g/cm3

Solid content

100 %

100 %

Mixing ratio

by volume

by weight

100 : 31

100 : 25

Viscosity (CQP029-4)

Rheometer, CC25, shear rate 7.255 s-1

mixed

128 500 mPa∙s A

200 mPa∙s B

55 000 mPa∙s A

Application temperature

15 – 30 °C

Pot life (CQP536-2)

9 minutes B

Open time (CQP526-3)

20 minutes B

Press time (CQP590-4)

1 MPa

45 minutes B

Shore D hardness (CQP023-1 / ISO 868)

75 C

Tensile strength (CQP543-1 / ISO 527)

27 MPa C

Elongation at break (CQP543-1 / ISO 527)

5 % C

Tensile lap-shear strength (CQP546-1 / ISO 4587)

13 MPa C

Shelf life

9 months

9 months

CQP = Corporate Quality Procedure

A) 25 °C

B) 23 °C / 50 % r.h.

C) 12 weeks at 23 °C / 50 % r.h.

CURE MECHANISM

The curing of SikaForce®-472 L9 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

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

Volume and positioning of the adhesive must be defined in a way, that the intended gap is sufficiently filled after joining the parts. The specific applied quantity and position must be determined by tests.
The procedure for manual application is as follows: Ensure that the A-component is stirred thoroughly to avoid any sediment or separation, taking care not to stir too vigorously as this may introduce air into the product. Add the B-component in the specified ratio and stir thoroughly, ensuring a homogeneous mixture is achieved.
Apply before reaching half of the pot-life and join parts together within the open time. Consider that, if mixed in larger amounts, the exothermic reaction can reduce the pot-life and open time significantly.
For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.

 

Pressing

An adequate bonding pressure is necessary to obtain a voidless contact between the substrates and the adhesive. The specific pressure is, however, dependent on the core material and must be determined by tests. The pressure must always be below the maximum compressive strength of the core. After starting the press process, do not release the pressure until the press time has elapsed.

Removal

Uncured SikaForce®-472 L9 may be removed from tools and equipment with SikaForce®-096 Cleaner. 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®-472 L9 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.

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