From its Stow headquarters, Struktol Company of America manufactures specialty additives that help processors work with rubber, plastics, PVC and wood-plastic compounds. A member of the Schill+Seilacher group, the company pairs its manufacturing operations with in-house research, development, quality control and compound-laboratory testing to develop application-specific solutions. Struktol has manufactured at its Stow facility since 1979 and operates an additional manufacturing site in Villa Rica, Georgia, with ISO 9001:2015-certified operations.
ISO 9001:2015 with Design
ISO 9001:2015
DIN EN ISO 9001:2015
DIN EN ISO 14001:2015
DIN EN ISO 50001:2011
RSPO Certification Mass Balance
EcoVadis Bronze Medal 2025
Compliance program
BBB Accredited Business
Compliance program
RSPOMASSBALANCE
Quality certification
BBBACCREDITATION
Quality certification
Norac AdditivesSince entering the metallic stearate business in 1966, Norac Additives has made oleochemical additives, with its Helena, Arkansas plant serving as the company’s manufacturing base. The Peter Greven Group company is particularly focused on plastics, where its metallic stearates and ester lubricants support PVC and other processing applications, while its Ambler, Pennsylvania laboratory develops application-specific solutions. Norac also operates an equipped quality laboratory in Helena and offers RSPO Mass Balance products.AMBLER, PA
FlexsysBorn from tire-additive technology that dates to 1944, Flexsys makes specialty chemicals that help tires and other rubber products last longer, perform better and run more efficiently. Based in Akron, Ohio, the company operates seven manufacturing facilities and technology centers across four continents, combining global production with customer-focused technical support. All of its manufacturing sites are ISO 9001:2015 certified, and Flexsys received a Platinum EcoVadis sustainability rating in 2025.AKRON, OH
Baerlocher USABaerlocher USA develops and manufactures additives for plastics, drawing on a group history dating to 1823 and more than 200 years of experience. The Baerlocher group says it has about 1,150 employees and a global presence, and identifies plastic additives as a long-standing specialty. Its U.S. locations include its Cincinnati headquarters and production site and a Dover production site.CINCINNATI, OH
Valtris Specialty ChemicalsValtris Specialty Chemicals is a global producer of specialty chemical additives and precursors, with more than 75 years of experience developing materials for customers worldwide. Headquartered in Independence, Ohio, the company combines technical expertise and formulation capabilities to make products for plastics and other industrial and consumer applications. Its global operations include nine facilities and the Valtris Champlor rapeseed-processing business in France.INDEPENDENCE, OH