About Us

Kadant GranTek Inc., a subsidiary of Kadant Inc., transforms papermaking sludge into cellulose-based granular products used as carriers for pest control in crop protection and green space maintenance, as a universal granular absorbent, and as premium cat box filler.

Our primary product brands include Biodac® dust free carrier, Gran-sorb® granular industrial absorbent, and several private label cat litter box filler products.

Our focus is on environmentally friendly manufacturing processes and products providing a safer, cleaner, and healthier environment.

Kadant GranTek uses post consumer recycled papermaking waste and transforms this waste material into several valuable commercial products, making a positive impact on the environment while providing safe and user-friendly biodegradable products.

In addition, Kadant GranTek creates no new waste in the manufacturing processes used for its products, keeping the earth greener in both the production process and with its products.


Kadant GranTek Inc.
607 Liberty Street
Green Bay, WI 54304 USA
Email: info@gran-sorb.com