Schrauben­sicherungs­lack.

Torque sealant is a varnish that is applied to mechanical fasteners and usually acts as a "visual safety mark" or inspection seal. Torque sealant is available in different colors and in transparent. Most torque sealants currently available on the market are solvent-based but more environmentally friendly variants, for example water-based (VOC-free) torque sealants, have been gaining in importance in recent years as they are much gentler on humans and nature.