12
•
For very thin roof panel materials and insuffi cient purchase in the insulating material, through holes
(Ø: 5.5 mm) into the interior of the vehicle are necessary; galvanised M5 raised head screws of suffi cient
length should then be used.
Make sure that you use a suffi ciently strong support that can accept the screw tensile forces (large plain
washers or a complete reinforcing plate).
Figure:
C
*) (not
included)
• Create the holes necessary to secure the mounting plate (Fig. C).
• In addition to the screwed 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 due to its broad range of adhesion.
Before you begin working with Sikafl ex® 291 sealing compound, make sure that you have carefully
read the safety information for Sikafl ex® products on the data sheet and the technical code of
practice 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.
For painted surfaces, ensure that the paint fi nish is suffi ciently well bonded to the substrate.
If the coat of paint is already loose or fl aky, it must be removed down to a stable layer in the area of the
adhesive application. 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 characteristics 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 attachment *)
