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Polysulphide
GD-116 is a two-part solvent-less polysulphide sealant
designed to be used as a secondary edge sealant for dual-seal insulating glass
units. It has high stability and elasticity and good gas permeability
characteristics. The pot life and curing speed of GD-116 can be quickly and
easily modified by changing the B-component, which is available in three cure
speeds….fast, standard and slow. This adds flexibility to the application
process. Furthermore, batch matching of both A & B components is not required.
GD-116 has excellent adhesion, without the use of primers, to clean surfaces
such as glass, aluminum, galvanized and stainless steel.
GD-116 demonstrates many advantages over other secondary sealants such as:
- High stability and elasticity.
- Excellent slump characteristics.
- Good flow characteristics provide for less wear and tear on equipment.
No abrasive compounds to plug screens or check valves.
- Low gas permeability.
- Very good flow behavior onto butyl PIB without trapping air.
- Fast curing speed in relation to a relatively long pot life. Flexibility
of pot life/curing speed by changing B-component (e.g. summer & winter).
- Good processing characteristics on both automatic and manual systems.
- Excellent adhesion to glass, aluminum and steel.
- Wide tolerance with respect to dosage fluctuations - maintains
physical properties.
GD-116 is formulated to work in both hand-gunning and
automated robotic applications. Due to its good flow
characteristics, it takes lower pressure to run which reduces the wear and tear on expensive machinery.
Although Kömmerling lead the way in 1960 introducing the first primer-free
polysulphide sealant, it was the low-viscosity formula developed in 1984 that
distinguished it from other sealants. The new version successfully combined
shorter curing times with a longer pot life. This was critical as polysulphide
could now be used in conjunction with the automated sealing machines that were
being introduced in the mid-80’s.
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