GREENTEC Line Versatile, VOC-compliant, eco-friendly With its GREENTEC Line products, Spies Hecker has given South African refinishers the option to use products that are more compatible with our sensitive environment. The GREENTEC LINE - which includes refinishing favourite Premium Surfacer Filler 5310 - has been available locally for a number of years. Fully compliant with European VOC standards, these products are even compatible with MS technology.