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SikaPower®-498/3

Highly crash toughened body shop adhesive

SikaPower®-498/3 is a one-part, epoxy based, warm-applied, heat-curing, impact modified structural adhesive. It is designed for sheet metal assembly work in the body shop and is cured with heat, e.g. in the paint oven.  

  • Highly crash toughened
  • Adheres well to oily substrates
  • High wash-out resistance
  • Can be spot-welded
  • High strength
  • Suitable to join different metals
  • Solvents, PVC and isocyanate free
 
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PRODUCT BENEFITS

  • Highly crash toughened
  • Adheres well to oily substrates
  • High wash-out resistance
  • Can be spot-welded
  • High strength
  • Suitable to join different metals
  • Solvents, PVC and isocyanate free
 

Areas of Application

SikaPower®-498/3 is suitable for high structural bonding of different types of metal and specific plastic materials. It is designed for use in combination with spot-welding, riveting, clinching and other mechanical fastening techniques, and in some cases as a partial replacement for them. The bonding of oily substrates (standard anti-corrosion treatment and deep drawing oils, approx. 2 g/m2) is possible because of the oil uptake during the heat curing. This product is suitable for experienced professional users only. Test with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.  

Product Details

Typical Product Data
Chemical base

Epoxy hybrid

Color (CQP001-1)

Gray

Solid content (CQP576-1)

99 %

Density (uncured)

1.3 kg/l

Application temperature

50 — 60 °C

Viscosity η* (DIN 54458)

flowability A4 at 45 °C

260 Pa∙s

Levelling behavior G' (DIN 54458)

A2 at 45 °C

40 000 Pa

Curing conditions

standard 180 °C 

minimum 160 °C

30 minutes A

15 minutes A

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

at 10 mm/minute

30 MPa B/C

Dynamic resistance to cleavage (CQP505-1, CQP580-6)

at 2 m/s

40 N/mm B/D

T-peel strength (CQP580-2, -6 / ISO 11339)

at 100 mm/minute

18 N/mm B/D

Tensile strength (CQP580-5, -6 / ISO 527)

at 2 mm/minute

30 MPa

Elongation at break (CQP036-2 / ISO 527)

at 2 mm/minute

5 %

Young's modulus (CQP036-2 / ISO 527)

at 2 mm/minute

2 000 MPa

Glass transition temperature (CQP039-1 / ISO 6721)

peak

110 °C F

Shelf life

10 months E

CQP = Corporate Quality Procedure

A) substrate temperature

B) steel, HDG, H420, 1.2 mm

C) bondline thickness 0.2 mmD) bondline thickness 0.3 mm

E) stored at temperature below 25 °C

F) tensile vibration, frequency 1 Hz, deformation stat./dyn. 0.3/0.05 %, heating rate 1 K/min
Technical Information

CURE MECHANISM

SikaPower®-498/3 is cured by heat. The cure-rate depends on temperature and time of exposure. The most common heat sources are convection ovens. The maximum temperature must not exceed 210 °C for more than 10 minutes.

Application

Application Information

METHOD OF APPLICATION

SikaPower®-498/3 is typically applied in bead form with a diameter of 1 to 3 mm.

All parts of the application system in contact with the product must be heated. A phased temperature increase from 35 °C at the follower plate to 55 °C at the application nozzle is typically used. During longer breaks (e.g. overnight or weekends) suitable standby temperatures and switch-off times must be taken into account.

The time between application and curing must be as short as possible, since moisture uptake could cause formation of blisters during the heat curing process. However, moisture uptake can be prevented by pre-curing the assemblies or car bodies for 15 minutes at 160 °C (substrate temperature).

SikaPower®-498/3 can be processed with hand-, pneumatic- or electric driven piston guns as well as dispensing equipment.
For advice on selecting and setting up a suitable pump system and related process parameters, contact the System Engineering Department of Sika Industry.

 

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