Sealant is the unsung hero of any good IG unit or energy-efficient window. Once the glass panes and spacer bars are in place, the addition of sealant keeps the entire construction structurally sound, prevents moisture and warm or cold air from entering through the window, and maintains the integrity of the interlayer gas pocket.
There are several different types of sealants on the market today, each with unique advantages and applications. Two-component and single-component sealants usually both require some form of curing. In two-component sealants, curing occurs when the two components are mixed, setting off a chemical reaction that creates a stable seal. Single-component sealants may require curing in the form of exposure to water vapor (which happens when the sealant is removed from the packaging and applied), or heat. While these types of sealants are widely used and generally sufficient for the job, the need for a curing process opens up the potential for error or failure, which can affect the overall integrity of the seals when used across a large number of IG units.
In the manufacture of insulated glass units, a primary and secondary sealant may be used in conjunction to enhance the overall integrity of the window. The extremely low moisture vapor and argon transmission rates offered by PIB butyl make it a good choice for a primary sealant. Sealing the IG unit against moisture helps keep condensation to a minimum, which enhances the life of window components and offers better energy efficiency overall, with the added bonus of keeping the view crisp and clear, even when there is indoor humidity or a significant temperature difference between indoor and outdoor. Likewise, low argon transmission keeps the denser gas inside the air pocket between the glass panes, reducing energy loss through windows over time and keeping heating and air conditioning bills low.
PIB butyl slugs must be heated before application, and are designed for use with industrial sealant extruders. Coniston distributes PIB butyl slugs in a variety of weights, so you can find what you’re looking for to keep your manufacturing process and supply chain running smoothly. Contact us for product details.
