SI Group

About SI Group

At SI Group, we create smart chemistry that solves global challenges and makes great things possible. SI Group is a performance additives and intermediates business. We offer a broad array of products that feed into diverse applications including pharmaceuticals; plastics; oil and gas; and tires, among many others. We create solutions that provide formulators and manufacturers with the ability to increase efficacy, efficiency, productivity, and purity in countless industrial and consumer goods.