Functional Products Inc. released a liquid polymer additive for use in biobased, lithium and calcium sulfonate greases. V-4051 is a grafted hydrocarbon polymer in biodegradable methyl ester that improves water resistance of greases at treat rates between 1 and 5 percent by weight to minimize spray-off and increase mechanical stability, the company says. It also raises the tackiness of the grease and reduces the required soap content, resulting in higher product yield. The polymer has a flash point over 150 degrees Celsius and kinematic viscosity between 2,000 and 3,000 centistokes at 100 C. Web: www.functionalproducts.com