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• For very thin roof panel materials and insuffi cient support in the insulating material, through holes
(Ø: 5.5 mm) into the interior of the vehicle are necessary; galvanised M5 round head screws of
suffi cient length should then be used.
Make sure that you use a suffi ciently strong support that can withstand the bolt tensile forces (large
plain washer or a complete reinforcing plate).
Figure: C
*) Not included
• Create the holes necessary to secure the mounting plate (Fig. C).
• In addition to the bolted connection, the mounting plate and roof gland must be bonded to the roof
with adhesive and sealed. This is done using the Sikafl ex
®
291 adhesive sealant supplied, which is
ideally suited for this purpose thanks to its broad range of adhesion.
Before starting to use Sikafl ex
®
291 adhesive sealant, be sure to read the Sikafl ex
®
Products
safety data sheet and technical data sheet in this installation manual!
The prerequisite for good adhesive characteristics is a clean, dry and grease-free substrate. You
should therefore clean the roof surface with a suitable cleaning agent within a circumference of 17 cm
around the drilled hole and allow the surface to dry thoroughly.
If the surface is painted, ensure that the paint fi nish is suffi ciently well bonded to the substrate.
If the coat of paint is already loose or peeling, it must be removed down to a stable layer in the area
to which the adhesive will bond. If you have any doubts concerning the adhesive characteristics, consult
a paint and lacquer specialist, or the manufacturer of your vehicle.
Under certain circumstances, it may be necessary for you to improve the adhesive properties of the roof
surface by pre-treatment with a cleaning agent available from specialist dealers (e.g. Sika
®
Cleaner)
or a primer (e.g. Sika
®
Primer).
The procedure for gluing the mounting plate is as follows:
INSTALLATION AND CONNECTION
Figure: D
Adhesive area
within the grooves
Adhesive area
Alternative
roof fastening
Ø 5.5
Ø 2.5–3