"Hesoolver 264 2021" appears to be an extremely niche or specific internal identifier, as there is no publicly documented software, organization, or historical event associated with this exact phrase.
Hessol 264 generally refers to a specialized category of industrial oils, typically positioned within the spectrum of process oils or rubber extension oils . In the context of the chemical and manufacturing industry, products in this series are often utilized as plasticizers or processing aids. They are designed to improve the elasticity and processability of rubber compounds and elastomers. hesoolver 264 2021