HYDROL L-HL hydraulic oils for hydrostatic hydraulic systems are based on high quality mineral base oils and a package of refining additives that improve anti-corrosion and anti-oxidation properties. DIN 51524 Part 1, NO-91-A231: 1998,
The oil has been approved for use in the mining industry and has a certificate issued by the Central Mining Institute authorising the products to carry the safety mark.