WHITE PAPER
NEW RELEASE
SikaForce®-820 L06 FOR POLYCARBONATE BONDING

Fig.1: Cross section of a polycarbonate specimen using SikaForce®-820 L06 vs. standard PUR

EXECUTIVE SUMMARY
Polycarbonate (PC) is one of the most fascinating polymers used in Automotive Industry. It’s clear andtough behavior makes it an ideal solution for many applications in designed interior and exterior parts.
Due to the stress cracking susceptible behavior of PC, joining processes play a major role.
Environmental Stress Cracking (ESC) occurs when polymers are stressed, and a critical substance ispresent. Many adhesives contain these critical substrates like plasticizer, solvents, or even just certain
monomers.
SikaForce® adhesives have been in use for many years and have proven themselves in numerous
projects and applications. Flexible or semi-structural bonds, with high requirements, for long-termrobustness and weather resistance are key functions of SikaForce® adhesives. The high processability
requirements in the automotive industry, for PC bonding, require short cycle times and pretreatment
less application. With SikaForce® adhesives, highly industrialized and automated performance can beachieved in joining assembly parts such as spoilers, roofs, and decorative components.
The new SikaForce®-820 L06 adhesive complements the strong SikaForce® portfolio. SikaForce®-820
L06 is a flexible adhesive that offers new benefits for customers who need a strong bond on PC without
the risk of stress cracking. Fast cure, good nonsagging behavior and processing properties makeSikaForce®-820 L06 the specialist for automated applications in PC and PC blend bonding.

ADVANTAGES AT A GLANCE•Process simplification- due to adjusted flow behavior and the correct balance of open time andstrength build-up•

Absence of plasticizer in the formulation minimizes risk for Environmental Stress Cracking (ESC)•Good adhesion to PC and PC-Blends without physical or chemical pretreatment•

Superior sagging behavior allows for high applicable bead thicknesses and a remarkable
tolerance compensation

KEY DATAPROPERTIESTYPICAL VALUES

Mixing ratio (by volume)

2:1

Tensile strength

3.5 MPa

Elongation at break

350 %E-Modulus (0,5 – 5 %)7 MPa

Tensile lap-shear strength

2.5 MPaOpen time at (23 °C / 50 % r. h.)

3 min

SAGGING BEHAVIOR

Round and triangle bead could be applied to a compressed bead thickness of 6 mm
STRESS CRACKING

PC specimen using SikaForce®-820 L06

2PC Specimen using a standard PUR adhesiveNEWS FROM THE MARKETThe first projects are underway using SikaForce®-820 L06 to bond PC covers for roof modules without
pretreatment. These projects demonstrate that the formulation of the new SikaForce®-820 L06 results
in reliable bonding without stress cracking in the field.
The result of a strong global network in all regions and close cooperation between all stakeholders andexperts enabled Sika once again to help customers write success stories.
OUTLOOK
Further new SikaForce®-8XX products in our pipeline – stay tuned!

Florian Altenwegner
Product Manager
Assembly Line Adhesives
Supporting roof, headlamp anddirect glazing bonding solutions
For more details on Sika solutions for Automotive contact us or visit our website
www.sika-automotive.com
LEGAL NOTE
The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in good faith
based on Sika's current knowledge and experience of the products when properly stored, handled and applied under normal condi tions inaccordance with Sika’s recommendations. in practice, the differences in materials, substrates and actual site conditions are such that nowarranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal rel ationshipwhatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The
user of the product must test the products suitability for the intended application and purpose. Sika reserves the right to c hange theproperties of its products. The proprietary rights of third parties must be observed. All orders are accepted subject to our current termsof sale and delivery. Users must always refer to the most recent issue of the local Product Data Sheet for the product concer ned, copies
of which will be supplied on request.

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