Thioplast™ G in Insulating Glass
The Industry's First Choice
Polysulfide sealants are the most popular and widely used secondary sealants in insulating glass worldwide. The polysulfide resins provide the unique combination of chemical and physical properties which make polysulfide resins the industry's first choice.
A secondary sealant has many important functions in the insulating glass unit. The most important function is to hold the unit together. A secondary sealant must be strong enough to maintain the cavity between the glass panes, but also it should remain elastic enough to compress and stretch as environmental changes dimensionally stress the unit. Thioplast™ G resins provide both the strength and elasticity required. These properties can be tailored to any specific environment, be it the Alaskan tundra or the Gobi desert.
Polysulfide resins are exceptionally good at maintaining gas integrity. In fact, they are three times better at retaining gas than silicone resins. With greater and greater use of gas filling driven by demands for greater insulating performance, the use of polysulfides is more critical than ever before.
One of the signs that an insulating glass unit has failed is clearly the moisture condensation inside the panes of the inner cavity. So therefore it stands to reason that the seals should act as a barrier to moisture incursion. Polysulfide based sealants form a very tight chemical lattice that is smaller than the diameter of a water molecule. Water is obstructed from passing through and long term moisture protection
With polysulfides you get a sealant that has great curing characteristics. Polysulfides are cured with readily available catalysts, can be formulated to give the optimal pot life, and completely cure over a wider mixing ratio range than other two component sealants. Another criterion is compatibility with other adhesives and sealants used in the manufacturing and glazing processes. Polysulfides are more chemically resistant to other typical components than silicones or polyurethanes, so your secondary seal won't be compromised by what a glazer might be using in installation.
Stella has decades of experience providing high quality products and service to insulating glass sealant manufacturers around the globe. If you are interested in talking to us about insulating glass sealants, please contact us.