The performance of an insulating glass unit depends heavily on the quality of its sealants, determining how well the window resists moisture, retains gas, and delivers long-term durability. For manufacturers, the reliability of these sealants directly influences production efficiency, product performance and customer satisfaction. This is the environment in which IGK has built its reputation by combining dependable chemistry with hands-on technical support to help customers keep their operations running smoothly.

Founded in Germany and known for developing the first non-mercury polyurethane sealant in 1988, IGK has spent nearly four decades advancing the materials used in insulating glass production. But what truly differentiates the company is not just its formulation expertise, it’s the emphasis on service, troubleshooting, and partnership.

“We do not believe in selling a product and walking away. We want to build a relationship and support each customer’s business,” says James Rodo, CEO. This philosophy shapes how IGK responds to challenges, develops new solutions, and supports manufacturers in their day-to-day operations.

IGK’s product range reflects both its history and continuous development efforts. The company produces polyurethane systems that have long formed the backbone of its portfolio, alongside reliable polysulfide materials for secondary sealing. Its polyisobutylene product provides a critical primary barrier for moisture and gas protection. As automated production has evolved, IGK has introduced thermoplastic spacer technology and is preparing to launch a new reactive TPS system. It also formulates a fire-resistant sealant for specialized applications and supplies cleaning solutions that help maintain equipment accuracy and cleanliness. Together, these materials allow IGK to support insulating glass production from preparation through long-term performance.

Behind this is a technical team that anchors IGK’s support model. The laboratory in Hasselroth is led by a head chemist and supported by an R&D chemist, three laboratory technicians, and an external R&D contractor with more than 35 years of experience. When a customer reports an issue, it begins by reviewing lot numbers and comparing samples with in-house retainers to determine if the sealant is performing correctly. If the material checks out, the case is escalated to IGK’s two field technicians, who specialize in identifying equipment-related issues. Distributor partners across Europe also provide ground insights, speaking with operators and observing production conditions to ensure an accurate assessment before the technical team intervenes.

  • We do not believe in selling a product and walking away. We want to build a relationship and support each customer’s business.


This structured approach helps customers avoid unnecessary downtime and waste, challenges that can quickly escalate in cost if not addressed properly. The company’s commitment to quality reinforces this support system. IGK holds certifications like CE, EN 1279 and ASTM 2190 and verifies every batch through daily testing in its laboratory. It also performs in-house compatibility studies and manages documentation and waste control through a dedicated officer, ensuring consistent reliability for customers.

The trust created through this combination of reliable products, careful testing and structured support can be seen in IGK’s customer base. The company supplies major manufacturers like Saint Gobain, Pilkington, AGC and Press Glass. These companies consume significant volumes each year across residential and commercial applications, reflecting the confidence they place in IGK’s products, service, and integrity.

To further support customers, IGK is preparing to introduce a dedicated maintenance department that will offer preventative maintenance programs for both existing and future equipment. This initiative aligns with the company’s long-term focus on reducing downtime, improving efficiency, and ensuring reliable production.

IGK’s story is one of partnership. By combining consistent product quality with experienced technical support, it helps customers keep production stable, equipment running efficiently, and insulating glass units performing as they should. As the industry continues to evolve, IGK remains focused on the same principles that have shaped it from the beginning: dependable chemistry, honest guidance and a long-term commitment to every customer it serves.