About Rose Mill Company

Rose Mill Company, a Kish Group Company

Specialty materials, made for your process.

For more than 30 years, Rose Mill Company has supplied manufacturers with borates, specialty minerals, and mineral-based chemicals, processed and packaged to their exact specifications. We are an ISO 9001:2015 certified manufacturer operating 30,000 sf processing facilities in West Hartford, Connecticut.

Rose Mill is now part of Kish Group, combining our processing expertise with Kish’s broad portfolio of performance minerals. Our customers now have one trusted partner for a much wider range of materials; held to the same quality standards they’ve always counted on.

Custom and Toll Processing

We don’t just supply materials. We process them to fit your application.

Pulverizing and particle size reduction

Screening

Mixing and custom blending

Bagging, filling and packaging

Large and small projects are welcome, and quick turnaround is often available.

Our Materials

Borates: boric acid, borax, and specialty borates

Molybdenum disulfide

Industrial lubricants and heat treating compounds

Extendospheres® ceramic microspheres

Mica, graphite, and silica

Flame retardants

Functional fillers, pigments, and fibers

Other minerals and mineral-based inorganic chemicals

Why Customers Choose Us

Secure supply. Boron is a U.S.-designated critical mineral, and global supply is tight. Our long-standing relationships with major refined borate producers give customers a dependable supply position.

Built to spec. Every order is processed to your requirements, not pulled off a shelf.

Certified quality. ISO 9001:2015 certified, serving customers in demanding industries who expect consistency lot after lot.

Our office hours are 8:00am-4:00pm EST, Monday through Friday (except for holidays).

Shipping and receiving hours are 8:00am-3:00pm EST, Monday-Friday, and by appointment.