| INTRODUCTION
MF-840 is
solvent free, two components and room temperature
cured polysulfide sealant. It has excellent
adhesion to most building materials such as
glass, aluminum alloy, galvanized-steel and
so on. The product is formulated to facilitate
optimal performance on both mechanical and manual
application equipment. MF-840 is used for the
manufacture of IG units (IGU) or double glazing
as a secondary seal in conjugation with butyl
as the primary sealant. MF-840 can also be used
singly as primary seal without butyl.
CHARACTERISTIC
MF-840 is a two parts component sealant cure
at room temperature. It is good at adhesion
and has excellent resistance to air aging.
It is free of solvent with low boiling point
and it has no pollution to the environment.
APPLICATION
MF-840 is mainly applied in the sealing of
IG insulated glass for building, construction,
transportation and refrigeration/freezing/chilling
industries.
NOTE
Polysulfide sealant is not recommended to be
used together with silicone sealant, or adhesion
would be affected. The operating temperature
should be at least 5℃ or above, or curing time
and adhesion would be affected.
APPLICATION METHODS
Surface cleaning
Surfaces where polysulphide shall be applied
must be cleaned, dried and free of grease.
Mixing
Part A and Part B must be mixed according to
the designated ratio, A:B = 100:6-14. Curing
speed can be adjusted (the larger the Part B,
the faster the curing time and, vice versa).
Part A and Part B should be mixed thoroughly
until there is no chromatic aberration.
Sealant applied direction
The sealant is always applied along one direction
to prevent any bubbles from creating.
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