This water-rinseable bio-blend is designed for removing tar, asphalt, road oil and grease from road equipment vehicles, storage tanks and machinery. When diluted per label directions the product will gel providing longer contact time when used on vertical surfaces. SOLAR GOLD Gellable Tar Remover is VOC compliant in all States, including California. It is non-acid, non-caustic, non-corrosive and contains no petroleum distillates or NPEs. United 696 is readily biodegradable.