Installation Instructions

SABIC Innovative Plastics 29
Installation
Dry Glazing Systems
This selection illustrates some glazing proposals using
commercially available proles which have proven to
be successful in combination with Lexan Thermoclear
sheet. Situations may occur where sheet expansion
exceeds sealant limitations and, often for aesthetic
reasons, this type of ‘dry’ glazing system provides an
ideal solution.
The advantage of dry systems is that the rubber
gaskets snap-t into the glazing strips which then allow
free movement of the sheet during expansion and
contraction. See g.16 and 17.
WARNING!
Do not use PVC gaskets.
Due to the migration of additives from soft PVC, the
Lexan Thermoclear sheet can be chemically affected
resulting in surface cracks or even sheet breakage.
A wide range of easy to use glazing bars and xing
accessories, designed specically for glazing Lexan
Thermoclear sheet, is available from most of the
approved Lexan Thermoclear sheet distributors and
specialised installers.
16-17-18-19. Different
installation
profile examples
Wet Glazing Systems
This type of installation system is mainly used in small
domestic type applications, car ports, warehouses,
conservatories and other glass replacement situations.
With standard metal proles or wooden sections,
in combination with glazing tapes and glazing
compounds, many different congurations are possible.
See g.18 and 19.
When using glazing compounds it is essential that the
sealant system accepts a certain amount of movement,
to allow for thermal expansion, without loss of adhesion
to the frame or sheet. Silicone sealants are generally
recommended for use with Lexan Thermoclear sheet,
but it is strongly advised when using sealing compounds
to check compatibility before use.
Care should be taken not to use amine nor benzamide
curing silicone sealants, which are not compatible with
Lexan sheet and result in crazing, particularly when
stress is involved. See page 17, Table 5, for suitable
sealant.
16
17
Thermal expansion allowance
min. 20 mm
Glazing filler tape
Silicone sealant
18
Metal frame Glazing filler tape
Silicone sealant
19